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1 <?php |
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2 /** |
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3 * Canonical API to handle WordPress Redirecting |
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4 * |
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5 * Based on "Permalink Redirect" from Scott Yang and "Enforce www. Preference" |
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6 * by Mark Jaquith |
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7 * |
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8 * @package WordPress |
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9 * @since 2.3.0 |
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10 */ |
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11 |
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12 /** |
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13 * Redirects incoming links to the proper URL based on the site url. |
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14 * |
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15 * Search engines consider www.somedomain.com and somedomain.com to be two |
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16 * different URLs when they both go to the same location. This SEO enhancement |
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17 * prevents penalty for duplicate content by redirecting all incoming links to |
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18 * one or the other. |
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19 * |
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20 * Prevents redirection for feeds, trackbacks, searches, comment popup, and |
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21 * admin URLs. Does not redirect on non-pretty-permalink-supporting IIS 7+, |
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22 * page/post previews, WP admin, Trackbacks, robots.txt, searches, or on POST |
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23 * requests. |
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24 * |
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25 * Will also attempt to find the correct link when a user enters a URL that does |
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26 * not exist based on exact WordPress query. Will instead try to parse the URL |
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27 * or query in an attempt to figure the correct page to go to. |
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28 * |
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29 * @since 2.3.0 |
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30 * @uses $wp_rewrite |
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31 * @uses $is_IIS |
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32 * |
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33 * @param string $requested_url Optional. The URL that was requested, used to |
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34 * figure if redirect is needed. |
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35 * @param bool $do_redirect Optional. Redirect to the new URL. |
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36 * @return null|false|string Null, if redirect not needed. False, if redirect |
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37 * not needed or the string of the URL |
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38 */ |
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39 function redirect_canonical( $requested_url = null, $do_redirect = true ) { |
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40 global $wp_rewrite, $is_IIS, $wp_query, $wpdb; |
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41 |
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42 if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || !empty($_POST) || is_preview() || is_robots() || ( $is_IIS && !iis7_supports_permalinks() ) ) |
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43 return; |
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44 |
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45 if ( !$requested_url ) { |
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46 // build the URL in the address bar |
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47 $requested_url = is_ssl() ? 'https://' : 'http://'; |
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48 $requested_url .= $_SERVER['HTTP_HOST']; |
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49 $requested_url .= $_SERVER['REQUEST_URI']; |
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50 } |
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51 |
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52 $original = @parse_url($requested_url); |
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53 if ( false === $original ) |
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54 return; |
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55 |
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56 // Some PHP setups turn requests for / into /index.php in REQUEST_URI |
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57 // See: http://trac.wordpress.org/ticket/5017 |
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58 // See: http://trac.wordpress.org/ticket/7173 |
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59 // Disabled, for now: |
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60 // $original['path'] = preg_replace('|/index\.php$|', '/', $original['path']); |
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61 |
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62 $redirect = $original; |
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63 $redirect_url = false; |
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64 |
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65 // Notice fixing |
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66 if ( !isset($redirect['path']) ) |
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67 $redirect['path'] = ''; |
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68 if ( !isset($redirect['query']) ) |
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69 $redirect['query'] = ''; |
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70 |
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71 if ( is_feed() && ( $id = get_query_var( 'p' ) ) ) { |
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72 if ( $redirect_url = get_post_comments_feed_link( $id, get_query_var( 'feed' ) ) ) { |
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73 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed'), $redirect_url ); |
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74 $redirect['path'] = parse_url( $redirect_url, PHP_URL_PATH ); |
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75 } |
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76 } |
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77 |
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78 if ( is_singular() && 1 > $wp_query->post_count && ($id = get_query_var('p')) ) { |
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79 |
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80 $vars = $wpdb->get_results( $wpdb->prepare("SELECT post_type, post_parent FROM $wpdb->posts WHERE ID = %d", $id) ); |
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81 |
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82 if ( isset($vars[0]) && $vars = $vars[0] ) { |
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83 if ( 'revision' == $vars->post_type && $vars->post_parent > 0 ) |
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84 $id = $vars->post_parent; |
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85 |
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86 if ( $redirect_url = get_permalink($id) ) |
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87 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); |
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88 } |
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89 } |
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90 |
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91 // These tests give us a WP-generated permalink |
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92 if ( is_404() ) { |
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93 |
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94 // Redirect ?page_id, ?p=, ?attachment_id= to their respective url's |
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95 $id = max( get_query_var('p'), get_query_var('page_id'), get_query_var('attachment_id') ); |
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96 if ( $id && $redirect_post = get_post($id) ) { |
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97 $post_type_obj = get_post_type_object($redirect_post->post_type); |
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98 if ( $post_type_obj->public ) { |
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99 $redirect_url = get_permalink($redirect_post); |
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100 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); |
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101 } |
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102 } |
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103 |
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104 if ( get_query_var( 'day' ) && get_query_var( 'monthnum' ) && get_query_var( 'year' ) ) { |
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105 $year = get_query_var( 'year' ); |
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106 $month = get_query_var( 'monthnum' ); |
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107 $day = get_query_var( 'day' ); |
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108 $date = sprintf( '%04d-%02d-%02d', $year, $month, $day ); |
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109 if ( ! wp_checkdate( $month, $day, $year, $date ) ) { |
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110 $redirect_url = get_month_link( $year, $month ); |
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111 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum', 'day' ), $redirect_url ); |
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112 } |
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113 } elseif ( get_query_var( 'monthnum' ) && get_query_var( 'year' ) && 12 < get_query_var( 'monthnum' ) ) { |
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114 $redirect_url = get_year_link( get_query_var( 'year' ) ); |
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115 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'year', 'monthnum' ), $redirect_url ); |
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116 } |
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117 |
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118 if ( ! $redirect_url ) { |
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119 if ( $redirect_url = redirect_guess_404_permalink() ) { |
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120 $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'page', 'feed', 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url ); |
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121 } |
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122 } |
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123 |
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124 } elseif ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) { |
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125 // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101 |
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126 if ( is_attachment() && !empty($_GET['attachment_id']) && ! $redirect_url ) { |
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127 if ( $redirect_url = get_attachment_link(get_query_var('attachment_id')) ) |
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128 $redirect['query'] = remove_query_arg('attachment_id', $redirect['query']); |
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129 } elseif ( is_single() && !empty($_GET['p']) && ! $redirect_url ) { |
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130 if ( $redirect_url = get_permalink(get_query_var('p')) ) |
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131 $redirect['query'] = remove_query_arg(array('p', 'post_type'), $redirect['query']); |
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132 } elseif ( is_single() && !empty($_GET['name']) && ! $redirect_url ) { |
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133 if ( $redirect_url = get_permalink( $wp_query->get_queried_object_id() ) ) |
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134 $redirect['query'] = remove_query_arg('name', $redirect['query']); |
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135 } elseif ( is_page() && !empty($_GET['page_id']) && ! $redirect_url ) { |
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136 if ( $redirect_url = get_permalink(get_query_var('page_id')) ) |
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137 $redirect['query'] = remove_query_arg('page_id', $redirect['query']); |
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138 } elseif ( is_page() && !is_feed() && isset($wp_query->queried_object) && 'page' == get_option('show_on_front') && $wp_query->queried_object->ID == get_option('page_on_front') && ! $redirect_url ) { |
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139 $redirect_url = home_url('/'); |
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140 } elseif ( is_home() && !empty($_GET['page_id']) && 'page' == get_option('show_on_front') && get_query_var('page_id') == get_option('page_for_posts') && ! $redirect_url ) { |
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141 if ( $redirect_url = get_permalink(get_option('page_for_posts')) ) |
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142 $redirect['query'] = remove_query_arg('page_id', $redirect['query']); |
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143 } elseif ( !empty($_GET['m']) && ( is_year() || is_month() || is_day() ) ) { |
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144 $m = get_query_var('m'); |
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145 switch ( strlen($m) ) { |
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146 case 4: // Yearly |
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147 $redirect_url = get_year_link($m); |
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148 break; |
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149 case 6: // Monthly |
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150 $redirect_url = get_month_link( substr($m, 0, 4), substr($m, 4, 2) ); |
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151 break; |
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152 case 8: // Daily |
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153 $redirect_url = get_day_link(substr($m, 0, 4), substr($m, 4, 2), substr($m, 6, 2)); |
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154 break; |
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155 } |
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156 if ( $redirect_url ) |
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157 $redirect['query'] = remove_query_arg('m', $redirect['query']); |
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158 // now moving on to non ?m=X year/month/day links |
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159 } elseif ( is_day() && get_query_var('year') && get_query_var('monthnum') && !empty($_GET['day']) ) { |
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160 if ( $redirect_url = get_day_link(get_query_var('year'), get_query_var('monthnum'), get_query_var('day')) ) |
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161 $redirect['query'] = remove_query_arg(array('year', 'monthnum', 'day'), $redirect['query']); |
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162 } elseif ( is_month() && get_query_var('year') && !empty($_GET['monthnum']) ) { |
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163 if ( $redirect_url = get_month_link(get_query_var('year'), get_query_var('monthnum')) ) |
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164 $redirect['query'] = remove_query_arg(array('year', 'monthnum'), $redirect['query']); |
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165 } elseif ( is_year() && !empty($_GET['year']) ) { |
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166 if ( $redirect_url = get_year_link(get_query_var('year')) ) |
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167 $redirect['query'] = remove_query_arg('year', $redirect['query']); |
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168 } elseif ( is_author() && !empty($_GET['author']) && preg_match( '|^[0-9]+$|', $_GET['author'] ) ) { |
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169 $author = get_userdata(get_query_var('author')); |
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170 if ( ( false !== $author ) && $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE $wpdb->posts.post_author = %d AND $wpdb->posts.post_status = 'publish' LIMIT 1", $author->ID ) ) ) { |
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171 if ( $redirect_url = get_author_posts_url($author->ID, $author->user_nicename) ) |
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172 $redirect['query'] = remove_query_arg('author', $redirect['query']); |
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173 } |
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174 } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (Tags/categories) |
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175 |
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176 $term_count = 0; |
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177 foreach ( $wp_query->tax_query->queries as $tax_query ) |
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178 $term_count += count( $tax_query['terms'] ); |
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179 |
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180 $obj = $wp_query->get_queried_object(); |
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181 if ( $term_count <= 1 && !empty($obj->term_id) && ( $tax_url = get_term_link((int)$obj->term_id, $obj->taxonomy) ) && !is_wp_error($tax_url) ) { |
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182 if ( !empty($redirect['query']) ) { |
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183 // Strip taxonomy query vars off the url. |
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184 $qv_remove = array( 'term', 'taxonomy'); |
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185 if ( is_category() ) { |
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186 $qv_remove[] = 'category_name'; |
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187 $qv_remove[] = 'cat'; |
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188 } elseif ( is_tag() ) { |
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189 $qv_remove[] = 'tag'; |
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190 $qv_remove[] = 'tag_id'; |
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191 } else { // Custom taxonomies will have a custom query var, remove those too: |
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192 $tax_obj = get_taxonomy( $obj->taxonomy ); |
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193 if ( false !== $tax_obj->query_var ) |
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194 $qv_remove[] = $tax_obj->query_var; |
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195 } |
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196 |
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197 $rewrite_vars = array_diff( array_keys($wp_query->query), array_keys($_GET) ); |
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198 |
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199 if ( !array_diff($rewrite_vars, array_keys($_GET)) ) { // Check to see if all the Query vars are coming from the rewrite, none are set via $_GET |
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200 $redirect['query'] = remove_query_arg($qv_remove, $redirect['query']); //Remove all of the per-tax qv's |
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201 |
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202 // Create the destination url for this taxonomy |
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203 $tax_url = parse_url($tax_url); |
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204 if ( ! empty($tax_url['query']) ) { // Taxonomy accessible via ?taxonomy=..&term=.. or any custom qv.. |
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205 parse_str($tax_url['query'], $query_vars); |
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206 $redirect['query'] = add_query_arg($query_vars, $redirect['query']); |
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207 } else { // Taxonomy is accessible via a "pretty-URL" |
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208 $redirect['path'] = $tax_url['path']; |
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209 } |
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210 |
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211 } else { // Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite |
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212 foreach ( $qv_remove as $_qv ) { |
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213 if ( isset($rewrite_vars[$_qv]) ) |
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214 $redirect['query'] = remove_query_arg($_qv, $redirect['query']); |
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215 } |
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216 } |
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217 } |
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218 |
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219 } |
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220 } elseif ( is_single() && strpos($wp_rewrite->permalink_structure, '%category%') !== false && $cat = get_query_var( 'category_name' ) ) { |
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221 $category = get_category_by_path( $cat ); |
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222 $post_terms = wp_get_object_terms($wp_query->get_queried_object_id(), 'category', array('fields' => 'tt_ids')); |
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223 if ( (!$category || is_wp_error($category)) || ( !is_wp_error($post_terms) && !empty($post_terms) && !in_array($category->term_taxonomy_id, $post_terms) ) ) |
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224 $redirect_url = get_permalink($wp_query->get_queried_object_id()); |
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225 } |
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226 |
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227 // Post Paging |
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228 if ( is_singular() && ! is_front_page() && get_query_var('page') ) { |
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229 if ( !$redirect_url ) |
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230 $redirect_url = get_permalink( get_queried_object_id() ); |
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231 $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); |
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232 $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); |
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233 } |
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234 |
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235 // paging and feeds |
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236 if ( get_query_var('paged') || is_feed() || get_query_var('cpage') ) { |
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237 while ( preg_match( "#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", $redirect['path'] ) || preg_match( '#/(comments/?)?(feed|rss|rdf|atom|rss2)(/+)?$#', $redirect['path'] ) || preg_match( '#/comment-page-[0-9]+(/+)?$#', $redirect['path'] ) ) { |
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238 // Strip off paging and feed |
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239 $redirect['path'] = preg_replace("#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing paging |
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240 $redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path']); // strip off feed endings |
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241 $redirect['path'] = preg_replace('#/comment-page-[0-9]+?(/+)?$#', '/', $redirect['path']); // strip off any existing comment paging |
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242 } |
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243 |
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244 $addl_path = ''; |
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245 if ( is_feed() && in_array( get_query_var('feed'), $wp_rewrite->feeds ) ) { |
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246 $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; |
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247 if ( !is_singular() && get_query_var( 'withcomments' ) ) |
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248 $addl_path .= 'comments/'; |
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249 if ( ( 'rss' == get_default_feed() && 'feed' == get_query_var('feed') ) || 'rss' == get_query_var('feed') ) |
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250 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == 'rss2' ) ? '' : 'rss2' ), 'feed' ); |
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251 else |
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252 $addl_path .= user_trailingslashit( 'feed/' . ( ( get_default_feed() == get_query_var('feed') || 'feed' == get_query_var('feed') ) ? '' : get_query_var('feed') ), 'feed' ); |
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253 $redirect['query'] = remove_query_arg( 'feed', $redirect['query'] ); |
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254 } elseif ( is_feed() && 'old' == get_query_var('feed') ) { |
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255 $old_feed_files = array( |
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256 'wp-atom.php' => 'atom', |
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257 'wp-commentsrss2.php' => 'comments_rss2', |
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258 'wp-feed.php' => get_default_feed(), |
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259 'wp-rdf.php' => 'rdf', |
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260 'wp-rss.php' => 'rss2', |
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261 'wp-rss2.php' => 'rss2', |
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262 ); |
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263 if ( isset( $old_feed_files[ basename( $redirect['path'] ) ] ) ) { |
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264 $redirect_url = get_feed_link( $old_feed_files[ basename( $redirect['path'] ) ] ); |
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265 wp_redirect( $redirect_url, 301 ); |
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266 die(); |
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267 } |
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268 } |
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269 |
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270 if ( get_query_var('paged') > 0 ) { |
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271 $paged = get_query_var('paged'); |
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272 $redirect['query'] = remove_query_arg( 'paged', $redirect['query'] ); |
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273 if ( !is_feed() ) { |
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274 if ( $paged > 1 && !is_single() ) { |
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275 $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit("$wp_rewrite->pagination_base/$paged", 'paged'); |
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276 } elseif ( !is_single() ) { |
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277 $addl_path = !empty( $addl_path ) ? trailingslashit($addl_path) : ''; |
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278 } |
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279 } elseif ( $paged > 1 ) { |
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280 $redirect['query'] = add_query_arg( 'paged', $paged, $redirect['query'] ); |
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281 } |
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282 } |
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283 |
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284 if ( get_option('page_comments') && ( ( 'newest' == get_option('default_comments_page') && get_query_var('cpage') > 0 ) || ( 'newest' != get_option('default_comments_page') && get_query_var('cpage') > 1 ) ) ) { |
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285 $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit( 'comment-page-' . get_query_var('cpage'), 'commentpaged' ); |
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286 $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] ); |
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287 } |
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288 |
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289 $redirect['path'] = user_trailingslashit( preg_replace('|/' . preg_quote( $wp_rewrite->index, '|' ) . '/?$|', '/', $redirect['path']) ); // strip off trailing /index.php/ |
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290 if ( !empty( $addl_path ) && $wp_rewrite->using_index_permalinks() && strpos($redirect['path'], '/' . $wp_rewrite->index . '/') === false ) |
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291 $redirect['path'] = trailingslashit($redirect['path']) . $wp_rewrite->index . '/'; |
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292 if ( !empty( $addl_path ) ) |
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293 $redirect['path'] = trailingslashit($redirect['path']) . $addl_path; |
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294 $redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path']; |
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295 } |
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296 |
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297 if ( 'wp-register.php' == basename( $redirect['path'] ) ) { |
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298 if ( is_multisite() ) |
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299 /** This filter is documented in wp-login.php */ |
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300 $redirect_url = apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) ); |
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301 else |
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302 $redirect_url = site_url( 'wp-login.php?action=register' ); |
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303 wp_redirect( $redirect_url, 301 ); |
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304 die(); |
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305 } |
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306 } |
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307 |
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308 // tack on any additional query vars |
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309 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); |
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310 if ( $redirect_url && !empty($redirect['query']) ) { |
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311 parse_str( $redirect['query'], $_parsed_query ); |
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312 $redirect = @parse_url($redirect_url); |
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313 |
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314 if ( ! empty( $_parsed_query['name'] ) && ! empty( $redirect['query'] ) ) { |
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315 parse_str( $redirect['query'], $_parsed_redirect_query ); |
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316 |
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317 if ( empty( $_parsed_redirect_query['name'] ) ) |
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318 unset( $_parsed_query['name'] ); |
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319 } |
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320 |
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321 $_parsed_query = rawurlencode_deep( $_parsed_query ); |
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322 $redirect_url = add_query_arg( $_parsed_query, $redirect_url ); |
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323 } |
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324 |
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325 if ( $redirect_url ) |
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326 $redirect = @parse_url($redirect_url); |
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327 |
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328 // www.example.com vs example.com |
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329 $user_home = @parse_url(home_url()); |
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330 if ( !empty($user_home['host']) ) |
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331 $redirect['host'] = $user_home['host']; |
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332 if ( empty($user_home['path']) ) |
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333 $user_home['path'] = '/'; |
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334 |
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335 // Handle ports |
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336 if ( !empty($user_home['port']) ) |
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337 $redirect['port'] = $user_home['port']; |
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338 else |
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339 unset($redirect['port']); |
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340 |
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341 // trailing /index.php |
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342 $redirect['path'] = preg_replace('|/' . preg_quote( $wp_rewrite->index, '|' ) . '/*?$|', '/', $redirect['path']); |
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343 |
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344 // Remove trailing spaces from the path |
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345 $redirect['path'] = preg_replace( '#(%20| )+$#', '', $redirect['path'] ); |
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346 |
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347 if ( !empty( $redirect['query'] ) ) { |
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348 // Remove trailing spaces from certain terminating query string args |
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349 $redirect['query'] = preg_replace( '#((p|page_id|cat|tag)=[^&]*?)(%20| )+$#', '$1', $redirect['query'] ); |
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350 |
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351 // Clean up empty query strings |
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352 $redirect['query'] = trim(preg_replace( '#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query']), '&'); |
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353 |
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354 // Redirect obsolete feeds |
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355 $redirect['query'] = preg_replace( '#(^|&)feed=rss(&|$)#', '$1feed=rss2$2', $redirect['query'] ); |
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356 |
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357 // Remove redundant leading ampersands |
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358 $redirect['query'] = preg_replace( '#^\??&*?#', '', $redirect['query'] ); |
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359 } |
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360 |
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361 // strip /index.php/ when we're not using PATHINFO permalinks |
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362 if ( !$wp_rewrite->using_index_permalinks() ) |
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363 $redirect['path'] = str_replace( '/' . $wp_rewrite->index . '/', '/', $redirect['path'] ); |
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364 |
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365 // trailing slashes |
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366 if ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !is_404() && (!is_front_page() || ( is_front_page() && (get_query_var('paged') > 1) ) ) ) { |
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367 $user_ts_type = ''; |
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368 if ( get_query_var('paged') > 0 ) { |
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369 $user_ts_type = 'paged'; |
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370 } else { |
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371 foreach ( array('single', 'category', 'page', 'day', 'month', 'year', 'home') as $type ) { |
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372 $func = 'is_' . $type; |
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373 if ( call_user_func($func) ) { |
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374 $user_ts_type = $type; |
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375 break; |
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376 } |
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377 } |
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378 } |
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379 $redirect['path'] = user_trailingslashit($redirect['path'], $user_ts_type); |
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380 } elseif ( is_front_page() ) { |
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381 $redirect['path'] = trailingslashit($redirect['path']); |
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382 } |
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383 |
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384 // Strip multiple slashes out of the URL |
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385 if ( strpos($redirect['path'], '//') > -1 ) |
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386 $redirect['path'] = preg_replace('|/+|', '/', $redirect['path']); |
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387 |
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388 // Always trailing slash the Front Page URL |
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389 if ( trailingslashit( $redirect['path'] ) == trailingslashit( $user_home['path'] ) ) |
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390 $redirect['path'] = trailingslashit($redirect['path']); |
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391 |
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392 // Ignore differences in host capitalization, as this can lead to infinite redirects |
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393 // Only redirect no-www <=> yes-www |
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394 if ( strtolower($original['host']) == strtolower($redirect['host']) || |
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395 ( strtolower($original['host']) != 'www.' . strtolower($redirect['host']) && 'www.' . strtolower($original['host']) != strtolower($redirect['host']) ) ) |
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396 $redirect['host'] = $original['host']; |
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397 |
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398 $compare_original = array($original['host'], $original['path']); |
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399 |
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400 if ( !empty( $original['port'] ) ) |
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401 $compare_original[] = $original['port']; |
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402 |
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403 if ( !empty( $original['query'] ) ) |
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404 $compare_original[] = $original['query']; |
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405 |
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406 $compare_redirect = array($redirect['host'], $redirect['path']); |
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407 |
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408 if ( !empty( $redirect['port'] ) ) |
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409 $compare_redirect[] = $redirect['port']; |
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410 |
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411 if ( !empty( $redirect['query'] ) ) |
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412 $compare_redirect[] = $redirect['query']; |
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413 |
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414 if ( $compare_original !== $compare_redirect ) { |
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415 $redirect_url = $redirect['scheme'] . '://' . $redirect['host']; |
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416 if ( !empty($redirect['port']) ) |
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417 $redirect_url .= ':' . $redirect['port']; |
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418 $redirect_url .= $redirect['path']; |
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419 if ( !empty($redirect['query']) ) |
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420 $redirect_url .= '?' . $redirect['query']; |
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421 } |
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422 |
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423 if ( !$redirect_url || $redirect_url == $requested_url ) |
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424 return false; |
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425 |
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426 // Hex encoded octets are case-insensitive. |
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427 if ( false !== strpos($requested_url, '%') ) { |
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428 if ( !function_exists('lowercase_octets') ) { |
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429 function lowercase_octets($matches) { |
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430 return strtolower( $matches[0] ); |
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431 } |
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432 } |
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433 $requested_url = preg_replace_callback('|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url); |
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434 } |
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435 |
|
436 /** |
|
437 * Filter the canonical redirect URL. |
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438 * |
|
439 * Returning false to this filter will cancel the redirect. |
|
440 * |
|
441 * @since 2.3.0 |
|
442 * |
|
443 * @param string $redirect_url The redirect URL. |
|
444 * @param string $requested_url The requested URL. |
|
445 */ |
|
446 $redirect_url = apply_filters( 'redirect_canonical', $redirect_url, $requested_url ); |
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447 |
|
448 if ( !$redirect_url || $redirect_url == $requested_url ) // yes, again -- in case the filter aborted the request |
|
449 return false; |
|
450 |
|
451 if ( $do_redirect ) { |
|
452 // protect against chained redirects |
|
453 if ( !redirect_canonical($redirect_url, false) ) { |
|
454 wp_redirect($redirect_url, 301); |
|
455 exit(); |
|
456 } else { |
|
457 // Debug |
|
458 // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) ); |
|
459 return false; |
|
460 } |
|
461 } else { |
|
462 return $redirect_url; |
|
463 } |
|
464 } |
|
465 |
|
466 /** |
|
467 * Removes arguments from a query string if they are not present in a URL |
|
468 * DO NOT use this in plugin code. |
|
469 * |
|
470 * @since 3.4 |
|
471 * @access private |
|
472 * |
|
473 * @return string The altered query string |
|
474 */ |
|
475 function _remove_qs_args_if_not_in_url( $query_string, Array $args_to_check, $url ) { |
|
476 $parsed_url = @parse_url( $url ); |
|
477 if ( ! empty( $parsed_url['query'] ) ) { |
|
478 parse_str( $parsed_url['query'], $parsed_query ); |
|
479 foreach ( $args_to_check as $qv ) { |
|
480 if ( !isset( $parsed_query[$qv] ) ) |
|
481 $query_string = remove_query_arg( $qv, $query_string ); |
|
482 } |
|
483 } else { |
|
484 $query_string = remove_query_arg( $args_to_check, $query_string ); |
|
485 } |
|
486 return $query_string; |
|
487 } |
|
488 |
|
489 /** |
|
490 * Attempts to guess the correct URL based on query vars |
|
491 * |
|
492 * @since 2.3.0 |
|
493 * @uses $wpdb |
|
494 * |
|
495 * @return bool|string The correct URL if one is found. False on failure. |
|
496 */ |
|
497 function redirect_guess_404_permalink() { |
|
498 global $wpdb, $wp_rewrite; |
|
499 |
|
500 if ( get_query_var('name') ) { |
|
501 $where = $wpdb->prepare("post_name LIKE %s", like_escape( get_query_var('name') ) . '%'); |
|
502 |
|
503 // if any of post_type, year, monthnum, or day are set, use them to refine the query |
|
504 if ( get_query_var('post_type') ) |
|
505 $where .= $wpdb->prepare(" AND post_type = %s", get_query_var('post_type')); |
|
506 else |
|
507 $where .= " AND post_type IN ('" . implode( "', '", get_post_types( array( 'public' => true ) ) ) . "')"; |
|
508 |
|
509 if ( get_query_var('year') ) |
|
510 $where .= $wpdb->prepare(" AND YEAR(post_date) = %d", get_query_var('year')); |
|
511 if ( get_query_var('monthnum') ) |
|
512 $where .= $wpdb->prepare(" AND MONTH(post_date) = %d", get_query_var('monthnum')); |
|
513 if ( get_query_var('day') ) |
|
514 $where .= $wpdb->prepare(" AND DAYOFMONTH(post_date) = %d", get_query_var('day')); |
|
515 |
|
516 $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'"); |
|
517 if ( ! $post_id ) |
|
518 return false; |
|
519 if ( get_query_var( 'feed' ) ) |
|
520 return get_post_comments_feed_link( $post_id, get_query_var( 'feed' ) ); |
|
521 elseif ( get_query_var( 'page' ) ) |
|
522 return trailingslashit( get_permalink( $post_id ) ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' ); |
|
523 else |
|
524 return get_permalink( $post_id ); |
|
525 } |
|
526 |
|
527 return false; |
|
528 } |
|
529 |
|
530 add_action('template_redirect', 'redirect_canonical'); |
|
531 |
|
532 function wp_redirect_admin_locations() { |
|
533 global $wp_rewrite; |
|
534 if ( ! ( is_404() && $wp_rewrite->using_permalinks() ) ) |
|
535 return; |
|
536 |
|
537 $admins = array( |
|
538 home_url( 'wp-admin', 'relative' ), |
|
539 home_url( 'dashboard', 'relative' ), |
|
540 home_url( 'admin', 'relative' ), |
|
541 site_url( 'dashboard', 'relative' ), |
|
542 site_url( 'admin', 'relative' ), |
|
543 ); |
|
544 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $admins ) ) { |
|
545 wp_redirect( admin_url() ); |
|
546 exit; |
|
547 } |
|
548 |
|
549 $logins = array( |
|
550 home_url( 'wp-login.php', 'relative' ), |
|
551 home_url( 'login', 'relative' ), |
|
552 site_url( 'login', 'relative' ), |
|
553 ); |
|
554 if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $logins ) ) { |
|
555 wp_redirect( site_url( 'wp-login.php', 'login' ) ); |
|
556 exit; |
|
557 } |
|
558 } |
|
559 |
|
560 add_action( 'template_redirect', 'wp_redirect_admin_locations', 1000 ); |