1 <?php

     2 

     3 /**

     4  * Generates version 4 UUIDs

     5  * from https://github.com/ramsey/uuid/blob/2.8/src/Uuid.php

     6  * and http://stackoverflow.com/a/2040279

     7  *

     8  * @return string

     9  */

    10 function genUuid4() {

    11 

    12     if (function_exists('openssl_random_pseudo_bytes')) {

    13         $bytes = openssl_random_pseudo_bytes(16);

    14     }

    15     else {

    16         $bytes = '';

    17         mt_srand(crc32(serialize([microtime(true), 'USER_IP', 'ETC'])));

    18         for ($i = 1; $i <= $length; $i++) {

    19             $bytes = chr(mt_rand(0, 255)) . $bytes;

    20         }

    21     }

    22 

    23 

    24     $bytes[6] = chr(ord($bytes[6]) & 0x0f | 0x40); // set version to 0100

    25     $bytes[8] = chr(ord($bytes[8]) & 0x3f | 0x80); // set bits 6-7 to 10

    26 

    27     return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($bytes), 4));

    28 }

    29 

    30 

    31 /**

    32  * get page self url

    33  * from http://stackoverflow.com/a/2236887

    34  */

    35 function strleft($s1, $s2) { return substr($s1, 0, strpos($s1, $s2)); }

    36 function selfURL()

    37 {

    38     $s = empty($_SERVER["HTTPS"]) ? '' : ($_SERVER["HTTPS"] == "on") ? "s" : "";

    39     $protocol = strleft(strtolower($_SERVER["SERVER_PROTOCOL"]), "/").$s;

    40     $port = ($_SERVER["SERVER_PORT"] == "80") ? "" : (":".$_SERVER["SERVER_PORT"]);

    41     return $protocol."://".$_SERVER['SERVER_NAME'].$port.$_SERVER['REQUEST_URI'];

    42 }

    43 

    44 function selfBaseURL()

    45 {

    46     $s = empty($_SERVER["HTTPS"]) ? '' : ($_SERVER["HTTPS"] == "on") ? "s" : "";

    47     $protocol = strleft(strtolower($_SERVER["SERVER_PROTOCOL"]), "/").$s;

    48     $port = ($_SERVER["SERVER_PORT"] == "80") ? "" : (":".$_SERVER["SERVER_PORT"]);

    49     return $protocol."://".$_SERVER['SERVER_NAME'].$port.dirname($_SERVER['REQUEST_URI']);

    50 }