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1 <?php |
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2 /** |
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3 * SimplePie |
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4 * |
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5 * A PHP-Based RSS and Atom Feed Framework. |
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6 * Takes the hard work out of managing a complete RSS/Atom solution. |
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7 * |
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8 * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors |
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9 * All rights reserved. |
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10 * |
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11 * Redistribution and use in source and binary forms, with or without modification, are |
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12 * permitted provided that the following conditions are met: |
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13 * |
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14 * * Redistributions of source code must retain the above copyright notice, this list of |
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15 * conditions and the following disclaimer. |
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16 * |
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17 * * Redistributions in binary form must reproduce the above copyright notice, this list |
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18 * of conditions and the following disclaimer in the documentation and/or other materials |
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19 * provided with the distribution. |
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20 * |
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21 * * Neither the name of the SimplePie Team nor the names of its contributors may be used |
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22 * to endorse or promote products derived from this software without specific prior |
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23 * written permission. |
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24 * |
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25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS |
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26 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
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27 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS |
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28 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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33 * POSSIBILITY OF SUCH DAMAGE. |
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34 * |
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35 * @package SimplePie |
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36 * @version 1.3.1 |
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37 * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue |
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38 * @author Ryan Parman |
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39 * @author Geoffrey Sneddon |
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40 * @author Ryan McCue |
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41 * @link http://simplepie.org/ SimplePie |
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42 * @license http://www.opensource.org/licenses/bsd-license.php BSD License |
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43 */ |
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44 |
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45 |
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46 /** |
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47 * Date Parser |
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48 * |
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49 * @package SimplePie |
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50 * @subpackage Parsing |
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51 */ |
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52 class SimplePie_Parse_Date |
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53 { |
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54 /** |
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55 * Input data |
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56 * |
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57 * @access protected |
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58 * @var string |
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59 */ |
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60 var $date; |
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61 |
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62 /** |
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63 * List of days, calendar day name => ordinal day number in the week |
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64 * |
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65 * @access protected |
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66 * @var array |
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67 */ |
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68 var $day = array( |
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69 // English |
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70 'mon' => 1, |
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71 'monday' => 1, |
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72 'tue' => 2, |
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73 'tuesday' => 2, |
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74 'wed' => 3, |
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75 'wednesday' => 3, |
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76 'thu' => 4, |
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77 'thursday' => 4, |
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78 'fri' => 5, |
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79 'friday' => 5, |
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80 'sat' => 6, |
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81 'saturday' => 6, |
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82 'sun' => 7, |
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83 'sunday' => 7, |
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84 // Dutch |
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85 'maandag' => 1, |
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86 'dinsdag' => 2, |
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87 'woensdag' => 3, |
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88 'donderdag' => 4, |
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89 'vrijdag' => 5, |
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90 'zaterdag' => 6, |
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91 'zondag' => 7, |
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92 // French |
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93 'lundi' => 1, |
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94 'mardi' => 2, |
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95 'mercredi' => 3, |
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96 'jeudi' => 4, |
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97 'vendredi' => 5, |
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98 'samedi' => 6, |
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99 'dimanche' => 7, |
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100 // German |
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101 'montag' => 1, |
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102 'dienstag' => 2, |
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103 'mittwoch' => 3, |
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104 'donnerstag' => 4, |
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105 'freitag' => 5, |
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106 'samstag' => 6, |
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107 'sonnabend' => 6, |
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108 'sonntag' => 7, |
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109 // Italian |
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110 'lunedì' => 1, |
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111 'martedì' => 2, |
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112 'mercoledì' => 3, |
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113 'giovedì' => 4, |
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114 'venerdì' => 5, |
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115 'sabato' => 6, |
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116 'domenica' => 7, |
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117 // Spanish |
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118 'lunes' => 1, |
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119 'martes' => 2, |
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120 'miércoles' => 3, |
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121 'jueves' => 4, |
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122 'viernes' => 5, |
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123 'sábado' => 6, |
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124 'domingo' => 7, |
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125 // Finnish |
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126 'maanantai' => 1, |
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127 'tiistai' => 2, |
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128 'keskiviikko' => 3, |
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129 'torstai' => 4, |
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130 'perjantai' => 5, |
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131 'lauantai' => 6, |
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132 'sunnuntai' => 7, |
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133 // Hungarian |
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134 'hétfő' => 1, |
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135 'kedd' => 2, |
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136 'szerda' => 3, |
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137 'csütörtok' => 4, |
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138 'péntek' => 5, |
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139 'szombat' => 6, |
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140 'vasárnap' => 7, |
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141 // Greek |
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142 'Δευ' => 1, |
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143 'Τρι' => 2, |
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144 'Τετ' => 3, |
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145 'Πεμ' => 4, |
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146 'Παρ' => 5, |
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147 'Σαβ' => 6, |
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148 'Κυρ' => 7, |
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149 ); |
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150 |
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151 /** |
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152 * List of months, calendar month name => calendar month number |
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153 * |
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154 * @access protected |
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155 * @var array |
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156 */ |
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157 var $month = array( |
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158 // English |
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159 'jan' => 1, |
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160 'january' => 1, |
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161 'feb' => 2, |
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162 'february' => 2, |
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163 'mar' => 3, |
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164 'march' => 3, |
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165 'apr' => 4, |
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166 'april' => 4, |
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167 'may' => 5, |
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168 // No long form of May |
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169 'jun' => 6, |
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170 'june' => 6, |
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171 'jul' => 7, |
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172 'july' => 7, |
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173 'aug' => 8, |
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174 'august' => 8, |
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175 'sep' => 9, |
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176 'september' => 8, |
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177 'oct' => 10, |
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178 'october' => 10, |
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179 'nov' => 11, |
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180 'november' => 11, |
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181 'dec' => 12, |
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182 'december' => 12, |
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183 // Dutch |
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184 'januari' => 1, |
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185 'februari' => 2, |
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186 'maart' => 3, |
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187 'april' => 4, |
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188 'mei' => 5, |
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189 'juni' => 6, |
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190 'juli' => 7, |
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191 'augustus' => 8, |
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192 'september' => 9, |
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193 'oktober' => 10, |
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194 'november' => 11, |
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195 'december' => 12, |
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196 // French |
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197 'janvier' => 1, |
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198 'février' => 2, |
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199 'mars' => 3, |
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200 'avril' => 4, |
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201 'mai' => 5, |
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202 'juin' => 6, |
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203 'juillet' => 7, |
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204 'août' => 8, |
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205 'septembre' => 9, |
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206 'octobre' => 10, |
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207 'novembre' => 11, |
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208 'décembre' => 12, |
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209 // German |
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210 'januar' => 1, |
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211 'februar' => 2, |
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212 'märz' => 3, |
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213 'april' => 4, |
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214 'mai' => 5, |
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215 'juni' => 6, |
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216 'juli' => 7, |
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217 'august' => 8, |
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218 'september' => 9, |
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219 'oktober' => 10, |
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220 'november' => 11, |
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221 'dezember' => 12, |
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222 // Italian |
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223 'gennaio' => 1, |
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224 'febbraio' => 2, |
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225 'marzo' => 3, |
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226 'aprile' => 4, |
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227 'maggio' => 5, |
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228 'giugno' => 6, |
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229 'luglio' => 7, |
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230 'agosto' => 8, |
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231 'settembre' => 9, |
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232 'ottobre' => 10, |
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233 'novembre' => 11, |
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234 'dicembre' => 12, |
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235 // Spanish |
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236 'enero' => 1, |
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237 'febrero' => 2, |
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238 'marzo' => 3, |
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239 'abril' => 4, |
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240 'mayo' => 5, |
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241 'junio' => 6, |
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242 'julio' => 7, |
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243 'agosto' => 8, |
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244 'septiembre' => 9, |
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245 'setiembre' => 9, |
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246 'octubre' => 10, |
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247 'noviembre' => 11, |
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248 'diciembre' => 12, |
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249 // Finnish |
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250 'tammikuu' => 1, |
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251 'helmikuu' => 2, |
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252 'maaliskuu' => 3, |
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253 'huhtikuu' => 4, |
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254 'toukokuu' => 5, |
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255 'kesäkuu' => 6, |
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256 'heinäkuu' => 7, |
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257 'elokuu' => 8, |
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258 'suuskuu' => 9, |
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259 'lokakuu' => 10, |
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260 'marras' => 11, |
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261 'joulukuu' => 12, |
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262 // Hungarian |
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263 'január' => 1, |
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264 'február' => 2, |
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265 'március' => 3, |
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266 'április' => 4, |
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267 'május' => 5, |
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268 'június' => 6, |
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269 'július' => 7, |
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270 'augusztus' => 8, |
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271 'szeptember' => 9, |
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272 'október' => 10, |
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273 'november' => 11, |
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274 'december' => 12, |
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275 // Greek |
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276 'Ιαν' => 1, |
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277 'Φεβ' => 2, |
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278 'Μάώ' => 3, |
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279 'Μαώ' => 3, |
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280 'Απρ' => 4, |
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281 'Μάι' => 5, |
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282 'Μαϊ' => 5, |
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283 'Μαι' => 5, |
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284 'Ιούν' => 6, |
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285 'Ιον' => 6, |
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286 'Ιούλ' => 7, |
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287 'Ιολ' => 7, |
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288 'Αύγ' => 8, |
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289 'Αυγ' => 8, |
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290 'Σεπ' => 9, |
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291 'Οκτ' => 10, |
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292 'Νοέ' => 11, |
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293 'Δεκ' => 12, |
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294 ); |
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295 |
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296 /** |
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297 * List of timezones, abbreviation => offset from UTC |
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298 * |
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299 * @access protected |
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300 * @var array |
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301 */ |
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302 var $timezone = array( |
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303 'ACDT' => 37800, |
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304 'ACIT' => 28800, |
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305 'ACST' => 34200, |
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306 'ACT' => -18000, |
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307 'ACWDT' => 35100, |
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308 'ACWST' => 31500, |
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309 'AEDT' => 39600, |
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310 'AEST' => 36000, |
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311 'AFT' => 16200, |
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312 'AKDT' => -28800, |
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313 'AKST' => -32400, |
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314 'AMDT' => 18000, |
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315 'AMT' => -14400, |
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316 'ANAST' => 46800, |
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317 'ANAT' => 43200, |
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318 'ART' => -10800, |
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319 'AZOST' => -3600, |
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320 'AZST' => 18000, |
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321 'AZT' => 14400, |
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322 'BIOT' => 21600, |
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323 'BIT' => -43200, |
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324 'BOT' => -14400, |
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325 'BRST' => -7200, |
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326 'BRT' => -10800, |
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327 'BST' => 3600, |
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328 'BTT' => 21600, |
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329 'CAST' => 18000, |
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330 'CAT' => 7200, |
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331 'CCT' => 23400, |
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332 'CDT' => -18000, |
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333 'CEDT' => 7200, |
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334 'CET' => 3600, |
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335 'CGST' => -7200, |
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336 'CGT' => -10800, |
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337 'CHADT' => 49500, |
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338 'CHAST' => 45900, |
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339 'CIST' => -28800, |
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340 'CKT' => -36000, |
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341 'CLDT' => -10800, |
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342 'CLST' => -14400, |
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343 'COT' => -18000, |
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344 'CST' => -21600, |
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345 'CVT' => -3600, |
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346 'CXT' => 25200, |
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347 'DAVT' => 25200, |
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348 'DTAT' => 36000, |
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349 'EADT' => -18000, |
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350 'EAST' => -21600, |
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351 'EAT' => 10800, |
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352 'ECT' => -18000, |
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353 'EDT' => -14400, |
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354 'EEST' => 10800, |
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355 'EET' => 7200, |
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356 'EGT' => -3600, |
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357 'EKST' => 21600, |
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358 'EST' => -18000, |
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359 'FJT' => 43200, |
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360 'FKDT' => -10800, |
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361 'FKST' => -14400, |
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362 'FNT' => -7200, |
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363 'GALT' => -21600, |
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364 'GEDT' => 14400, |
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365 'GEST' => 10800, |
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366 'GFT' => -10800, |
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367 'GILT' => 43200, |
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368 'GIT' => -32400, |
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369 'GST' => 14400, |
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370 'GST' => -7200, |
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371 'GYT' => -14400, |
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372 'HAA' => -10800, |
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373 'HAC' => -18000, |
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374 'HADT' => -32400, |
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375 'HAE' => -14400, |
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376 'HAP' => -25200, |
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377 'HAR' => -21600, |
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378 'HAST' => -36000, |
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379 'HAT' => -9000, |
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380 'HAY' => -28800, |
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381 'HKST' => 28800, |
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382 'HMT' => 18000, |
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383 'HNA' => -14400, |
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384 'HNC' => -21600, |
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385 'HNE' => -18000, |
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386 'HNP' => -28800, |
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387 'HNR' => -25200, |
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388 'HNT' => -12600, |
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389 'HNY' => -32400, |
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390 'IRDT' => 16200, |
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391 'IRKST' => 32400, |
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392 'IRKT' => 28800, |
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393 'IRST' => 12600, |
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394 'JFDT' => -10800, |
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395 'JFST' => -14400, |
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396 'JST' => 32400, |
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397 'KGST' => 21600, |
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398 'KGT' => 18000, |
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399 'KOST' => 39600, |
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400 'KOVST' => 28800, |
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401 'KOVT' => 25200, |
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402 'KRAST' => 28800, |
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403 'KRAT' => 25200, |
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404 'KST' => 32400, |
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405 'LHDT' => 39600, |
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406 'LHST' => 37800, |
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407 'LINT' => 50400, |
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408 'LKT' => 21600, |
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409 'MAGST' => 43200, |
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410 'MAGT' => 39600, |
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411 'MAWT' => 21600, |
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412 'MDT' => -21600, |
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413 'MESZ' => 7200, |
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414 'MEZ' => 3600, |
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415 'MHT' => 43200, |
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416 'MIT' => -34200, |
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417 'MNST' => 32400, |
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418 'MSDT' => 14400, |
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419 'MSST' => 10800, |
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420 'MST' => -25200, |
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421 'MUT' => 14400, |
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422 'MVT' => 18000, |
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423 'MYT' => 28800, |
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424 'NCT' => 39600, |
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425 'NDT' => -9000, |
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426 'NFT' => 41400, |
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427 'NMIT' => 36000, |
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428 'NOVST' => 25200, |
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429 'NOVT' => 21600, |
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430 'NPT' => 20700, |
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431 'NRT' => 43200, |
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432 'NST' => -12600, |
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433 'NUT' => -39600, |
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434 'NZDT' => 46800, |
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435 'NZST' => 43200, |
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436 'OMSST' => 25200, |
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437 'OMST' => 21600, |
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438 'PDT' => -25200, |
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439 'PET' => -18000, |
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440 'PETST' => 46800, |
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441 'PETT' => 43200, |
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442 'PGT' => 36000, |
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443 'PHOT' => 46800, |
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444 'PHT' => 28800, |
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445 'PKT' => 18000, |
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446 'PMDT' => -7200, |
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447 'PMST' => -10800, |
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448 'PONT' => 39600, |
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449 'PST' => -28800, |
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450 'PWT' => 32400, |
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451 'PYST' => -10800, |
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452 'PYT' => -14400, |
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453 'RET' => 14400, |
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454 'ROTT' => -10800, |
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455 'SAMST' => 18000, |
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456 'SAMT' => 14400, |
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457 'SAST' => 7200, |
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458 'SBT' => 39600, |
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459 'SCDT' => 46800, |
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460 'SCST' => 43200, |
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461 'SCT' => 14400, |
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462 'SEST' => 3600, |
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463 'SGT' => 28800, |
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464 'SIT' => 28800, |
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465 'SRT' => -10800, |
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466 'SST' => -39600, |
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467 'SYST' => 10800, |
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468 'SYT' => 7200, |
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469 'TFT' => 18000, |
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470 'THAT' => -36000, |
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471 'TJT' => 18000, |
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472 'TKT' => -36000, |
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473 'TMT' => 18000, |
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474 'TOT' => 46800, |
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475 'TPT' => 32400, |
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476 'TRUT' => 36000, |
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477 'TVT' => 43200, |
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478 'TWT' => 28800, |
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479 'UYST' => -7200, |
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480 'UYT' => -10800, |
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481 'UZT' => 18000, |
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482 'VET' => -14400, |
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483 'VLAST' => 39600, |
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484 'VLAT' => 36000, |
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485 'VOST' => 21600, |
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486 'VUT' => 39600, |
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487 'WAST' => 7200, |
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488 'WAT' => 3600, |
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489 'WDT' => 32400, |
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490 'WEST' => 3600, |
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491 'WFT' => 43200, |
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492 'WIB' => 25200, |
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493 'WIT' => 32400, |
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494 'WITA' => 28800, |
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495 'WKST' => 18000, |
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496 'WST' => 28800, |
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497 'YAKST' => 36000, |
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498 'YAKT' => 32400, |
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499 'YAPT' => 36000, |
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500 'YEKST' => 21600, |
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501 'YEKT' => 18000, |
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502 ); |
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503 |
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504 /** |
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505 * Cached PCRE for SimplePie_Parse_Date::$day |
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506 * |
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507 * @access protected |
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508 * @var string |
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509 */ |
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510 var $day_pcre; |
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511 |
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512 /** |
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513 * Cached PCRE for SimplePie_Parse_Date::$month |
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514 * |
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515 * @access protected |
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516 * @var string |
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517 */ |
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518 var $month_pcre; |
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519 |
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520 /** |
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521 * Array of user-added callback methods |
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522 * |
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523 * @access private |
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524 * @var array |
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525 */ |
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526 var $built_in = array(); |
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527 |
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528 /** |
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529 * Array of user-added callback methods |
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530 * |
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531 * @access private |
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532 * @var array |
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533 */ |
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534 var $user = array(); |
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535 |
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536 /** |
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537 * Create new SimplePie_Parse_Date object, and set self::day_pcre, |
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538 * self::month_pcre, and self::built_in |
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539 * |
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540 * @access private |
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541 */ |
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542 public function __construct() |
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543 { |
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544 $this->day_pcre = '(' . implode(array_keys($this->day), '|') . ')'; |
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545 $this->month_pcre = '(' . implode(array_keys($this->month), '|') . ')'; |
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546 |
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547 static $cache; |
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548 if (!isset($cache[get_class($this)])) |
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549 { |
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550 $all_methods = get_class_methods($this); |
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551 |
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552 foreach ($all_methods as $method) |
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553 { |
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554 if (strtolower(substr($method, 0, 5)) === 'date_') |
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555 { |
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556 $cache[get_class($this)][] = $method; |
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557 } |
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558 } |
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559 } |
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560 |
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561 foreach ($cache[get_class($this)] as $method) |
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562 { |
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563 $this->built_in[] = $method; |
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564 } |
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565 } |
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566 |
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567 /** |
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568 * Get the object |
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569 * |
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570 * @access public |
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571 */ |
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572 public static function get() |
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573 { |
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574 static $object; |
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575 if (!$object) |
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576 { |
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577 $object = new SimplePie_Parse_Date; |
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578 } |
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579 return $object; |
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580 } |
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581 |
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582 /** |
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583 * Parse a date |
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584 * |
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585 * @final |
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586 * @access public |
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587 * @param string $date Date to parse |
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588 * @return int Timestamp corresponding to date string, or false on failure |
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589 */ |
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590 public function parse($date) |
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591 { |
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592 foreach ($this->user as $method) |
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593 { |
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594 if (($returned = call_user_func($method, $date)) !== false) |
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595 { |
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596 return $returned; |
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597 } |
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598 } |
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599 |
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600 foreach ($this->built_in as $method) |
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601 { |
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602 if (($returned = call_user_func(array($this, $method), $date)) !== false) |
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603 { |
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604 return $returned; |
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605 } |
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606 } |
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607 |
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608 return false; |
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609 } |
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610 |
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611 /** |
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612 * Add a callback method to parse a date |
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613 * |
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614 * @final |
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615 * @access public |
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616 * @param callback $callback |
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617 */ |
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618 public function add_callback($callback) |
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619 { |
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620 if (is_callable($callback)) |
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621 { |
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622 $this->user[] = $callback; |
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623 } |
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624 else |
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625 { |
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626 trigger_error('User-supplied function must be a valid callback', E_USER_WARNING); |
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627 } |
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628 } |
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629 |
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630 /** |
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631 * Parse a superset of W3C-DTF (allows hyphens and colons to be omitted, as |
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632 * well as allowing any of upper or lower case "T", horizontal tabs, or |
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633 * spaces to be used as the time seperator (including more than one)) |
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634 * |
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635 * @access protected |
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636 * @return int Timestamp |
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637 */ |
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638 public function date_w3cdtf($date) |
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639 { |
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640 static $pcre; |
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641 if (!$pcre) |
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642 { |
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643 $year = '([0-9]{4})'; |
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644 $month = $day = $hour = $minute = $second = '([0-9]{2})'; |
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645 $decimal = '([0-9]*)'; |
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646 $zone = '(?:(Z)|([+\-])([0-9]{1,2}):?([0-9]{1,2}))'; |
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647 $pcre = '/^' . $year . '(?:-?' . $month . '(?:-?' . $day . '(?:[Tt\x09\x20]+' . $hour . '(?::?' . $minute . '(?::?' . $second . '(?:.' . $decimal . ')?)?)?' . $zone . ')?)?)?$/'; |
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648 } |
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649 if (preg_match($pcre, $date, $match)) |
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650 { |
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651 /* |
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652 Capturing subpatterns: |
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653 1: Year |
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654 2: Month |
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655 3: Day |
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656 4: Hour |
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657 5: Minute |
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658 6: Second |
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659 7: Decimal fraction of a second |
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660 8: Zulu |
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661 9: Timezone ± |
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662 10: Timezone hours |
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663 11: Timezone minutes |
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664 */ |
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665 |
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666 // Fill in empty matches |
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667 for ($i = count($match); $i <= 3; $i++) |
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668 { |
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669 $match[$i] = '1'; |
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670 } |
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671 |
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672 for ($i = count($match); $i <= 7; $i++) |
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673 { |
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674 $match[$i] = '0'; |
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675 } |
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676 |
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677 // Numeric timezone |
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678 if (isset($match[9]) && $match[9] !== '') |
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679 { |
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680 $timezone = $match[10] * 3600; |
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681 $timezone += $match[11] * 60; |
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682 if ($match[9] === '-') |
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683 { |
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684 $timezone = 0 - $timezone; |
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685 } |
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686 } |
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687 else |
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688 { |
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689 $timezone = 0; |
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690 } |
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691 |
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692 // Convert the number of seconds to an integer, taking decimals into account |
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693 $second = round($match[6] + $match[7] / pow(10, strlen($match[7]))); |
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694 |
|
695 return gmmktime($match[4], $match[5], $second, $match[2], $match[3], $match[1]) - $timezone; |
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696 } |
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697 else |
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698 { |
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699 return false; |
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700 } |
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701 } |
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702 |
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703 /** |
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704 * Remove RFC822 comments |
|
705 * |
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706 * @access protected |
|
707 * @param string $data Data to strip comments from |
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708 * @return string Comment stripped string |
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709 */ |
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710 public function remove_rfc2822_comments($string) |
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711 { |
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712 $string = (string) $string; |
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713 $position = 0; |
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714 $length = strlen($string); |
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715 $depth = 0; |
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716 |
|
717 $output = ''; |
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718 |
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719 while ($position < $length && ($pos = strpos($string, '(', $position)) !== false) |
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720 { |
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721 $output .= substr($string, $position, $pos - $position); |
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722 $position = $pos + 1; |
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723 if ($string[$pos - 1] !== '\\') |
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724 { |
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725 $depth++; |
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726 while ($depth && $position < $length) |
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727 { |
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728 $position += strcspn($string, '()', $position); |
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729 if ($string[$position - 1] === '\\') |
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730 { |
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731 $position++; |
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732 continue; |
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733 } |
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734 elseif (isset($string[$position])) |
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735 { |
|
736 switch ($string[$position]) |
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737 { |
|
738 case '(': |
|
739 $depth++; |
|
740 break; |
|
741 |
|
742 case ')': |
|
743 $depth--; |
|
744 break; |
|
745 } |
|
746 $position++; |
|
747 } |
|
748 else |
|
749 { |
|
750 break; |
|
751 } |
|
752 } |
|
753 } |
|
754 else |
|
755 { |
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756 $output .= '('; |
|
757 } |
|
758 } |
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759 $output .= substr($string, $position); |
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760 |
|
761 return $output; |
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762 } |
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763 |
|
764 /** |
|
765 * Parse RFC2822's date format |
|
766 * |
|
767 * @access protected |
|
768 * @return int Timestamp |
|
769 */ |
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770 public function date_rfc2822($date) |
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771 { |
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772 static $pcre; |
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773 if (!$pcre) |
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774 { |
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775 $wsp = '[\x09\x20]'; |
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776 $fws = '(?:' . $wsp . '+|' . $wsp . '*(?:\x0D\x0A' . $wsp . '+)+)'; |
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777 $optional_fws = $fws . '?'; |
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778 $day_name = $this->day_pcre; |
|
779 $month = $this->month_pcre; |
|
780 $day = '([0-9]{1,2})'; |
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781 $hour = $minute = $second = '([0-9]{2})'; |
|
782 $year = '([0-9]{2,4})'; |
|
783 $num_zone = '([+\-])([0-9]{2})([0-9]{2})'; |
|
784 $character_zone = '([A-Z]{1,5})'; |
|
785 $zone = '(?:' . $num_zone . '|' . $character_zone . ')'; |
|
786 $pcre = '/(?:' . $optional_fws . $day_name . $optional_fws . ',)?' . $optional_fws . $day . $fws . $month . $fws . $year . $fws . $hour . $optional_fws . ':' . $optional_fws . $minute . '(?:' . $optional_fws . ':' . $optional_fws . $second . ')?' . $fws . $zone . '/i'; |
|
787 } |
|
788 if (preg_match($pcre, $this->remove_rfc2822_comments($date), $match)) |
|
789 { |
|
790 /* |
|
791 Capturing subpatterns: |
|
792 1: Day name |
|
793 2: Day |
|
794 3: Month |
|
795 4: Year |
|
796 5: Hour |
|
797 6: Minute |
|
798 7: Second |
|
799 8: Timezone ± |
|
800 9: Timezone hours |
|
801 10: Timezone minutes |
|
802 11: Alphabetic timezone |
|
803 */ |
|
804 |
|
805 // Find the month number |
|
806 $month = $this->month[strtolower($match[3])]; |
|
807 |
|
808 // Numeric timezone |
|
809 if ($match[8] !== '') |
|
810 { |
|
811 $timezone = $match[9] * 3600; |
|
812 $timezone += $match[10] * 60; |
|
813 if ($match[8] === '-') |
|
814 { |
|
815 $timezone = 0 - $timezone; |
|
816 } |
|
817 } |
|
818 // Character timezone |
|
819 elseif (isset($this->timezone[strtoupper($match[11])])) |
|
820 { |
|
821 $timezone = $this->timezone[strtoupper($match[11])]; |
|
822 } |
|
823 // Assume everything else to be -0000 |
|
824 else |
|
825 { |
|
826 $timezone = 0; |
|
827 } |
|
828 |
|
829 // Deal with 2/3 digit years |
|
830 if ($match[4] < 50) |
|
831 { |
|
832 $match[4] += 2000; |
|
833 } |
|
834 elseif ($match[4] < 1000) |
|
835 { |
|
836 $match[4] += 1900; |
|
837 } |
|
838 |
|
839 // Second is optional, if it is empty set it to zero |
|
840 if ($match[7] !== '') |
|
841 { |
|
842 $second = $match[7]; |
|
843 } |
|
844 else |
|
845 { |
|
846 $second = 0; |
|
847 } |
|
848 |
|
849 return gmmktime($match[5], $match[6], $second, $month, $match[2], $match[4]) - $timezone; |
|
850 } |
|
851 else |
|
852 { |
|
853 return false; |
|
854 } |
|
855 } |
|
856 |
|
857 /** |
|
858 * Parse RFC850's date format |
|
859 * |
|
860 * @access protected |
|
861 * @return int Timestamp |
|
862 */ |
|
863 public function date_rfc850($date) |
|
864 { |
|
865 static $pcre; |
|
866 if (!$pcre) |
|
867 { |
|
868 $space = '[\x09\x20]+'; |
|
869 $day_name = $this->day_pcre; |
|
870 $month = $this->month_pcre; |
|
871 $day = '([0-9]{1,2})'; |
|
872 $year = $hour = $minute = $second = '([0-9]{2})'; |
|
873 $zone = '([A-Z]{1,5})'; |
|
874 $pcre = '/^' . $day_name . ',' . $space . $day . '-' . $month . '-' . $year . $space . $hour . ':' . $minute . ':' . $second . $space . $zone . '$/i'; |
|
875 } |
|
876 if (preg_match($pcre, $date, $match)) |
|
877 { |
|
878 /* |
|
879 Capturing subpatterns: |
|
880 1: Day name |
|
881 2: Day |
|
882 3: Month |
|
883 4: Year |
|
884 5: Hour |
|
885 6: Minute |
|
886 7: Second |
|
887 8: Timezone |
|
888 */ |
|
889 |
|
890 // Month |
|
891 $month = $this->month[strtolower($match[3])]; |
|
892 |
|
893 // Character timezone |
|
894 if (isset($this->timezone[strtoupper($match[8])])) |
|
895 { |
|
896 $timezone = $this->timezone[strtoupper($match[8])]; |
|
897 } |
|
898 // Assume everything else to be -0000 |
|
899 else |
|
900 { |
|
901 $timezone = 0; |
|
902 } |
|
903 |
|
904 // Deal with 2 digit year |
|
905 if ($match[4] < 50) |
|
906 { |
|
907 $match[4] += 2000; |
|
908 } |
|
909 else |
|
910 { |
|
911 $match[4] += 1900; |
|
912 } |
|
913 |
|
914 return gmmktime($match[5], $match[6], $match[7], $month, $match[2], $match[4]) - $timezone; |
|
915 } |
|
916 else |
|
917 { |
|
918 return false; |
|
919 } |
|
920 } |
|
921 |
|
922 /** |
|
923 * Parse C99's asctime()'s date format |
|
924 * |
|
925 * @access protected |
|
926 * @return int Timestamp |
|
927 */ |
|
928 public function date_asctime($date) |
|
929 { |
|
930 static $pcre; |
|
931 if (!$pcre) |
|
932 { |
|
933 $space = '[\x09\x20]+'; |
|
934 $wday_name = $this->day_pcre; |
|
935 $mon_name = $this->month_pcre; |
|
936 $day = '([0-9]{1,2})'; |
|
937 $hour = $sec = $min = '([0-9]{2})'; |
|
938 $year = '([0-9]{4})'; |
|
939 $terminator = '\x0A?\x00?'; |
|
940 $pcre = '/^' . $wday_name . $space . $mon_name . $space . $day . $space . $hour . ':' . $min . ':' . $sec . $space . $year . $terminator . '$/i'; |
|
941 } |
|
942 if (preg_match($pcre, $date, $match)) |
|
943 { |
|
944 /* |
|
945 Capturing subpatterns: |
|
946 1: Day name |
|
947 2: Month |
|
948 3: Day |
|
949 4: Hour |
|
950 5: Minute |
|
951 6: Second |
|
952 7: Year |
|
953 */ |
|
954 |
|
955 $month = $this->month[strtolower($match[2])]; |
|
956 return gmmktime($match[4], $match[5], $match[6], $month, $match[3], $match[7]); |
|
957 } |
|
958 else |
|
959 { |
|
960 return false; |
|
961 } |
|
962 } |
|
963 |
|
964 /** |
|
965 * Parse dates using strtotime() |
|
966 * |
|
967 * @access protected |
|
968 * @return int Timestamp |
|
969 */ |
|
970 public function date_strtotime($date) |
|
971 { |
|
972 $strtotime = strtotime($date); |
|
973 if ($strtotime === -1 || $strtotime === false) |
|
974 { |
|
975 return false; |
|
976 } |
|
977 else |
|
978 { |
|
979 return $strtotime; |
|
980 } |
|
981 } |
|
982 } |
|
983 |