http://www.snippetit.com/2009/04/php-short-url-algorithm-implementation/ IT News, Programming, Internet and Blogging Thu, 13 May 2010 02:36:59 -0400 http://wordpress.org/?v=2.9.2 hourly 1 http://www.snippetit.com/2009/04/php-short-url-algorithm-implementation/comment-page-1/#comment-124 Short Url（短网址）实现方式 | I@laoer.com Mon, 27 Apr 2009 06:18:15 +0000 http://www.snippetit.com/?p=83#comment-124 [...] 另一个算法来自http://www.snippetit.com/2009/04/php-short-url-algorithm-implementation/ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 function shorturl($input) { $base32 = array ( 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5' );   $hex = md5($input); $hexLen = strlen($hex); $subHexLen = $hexLen / 8; $output = array();   for ($i = 0; $i < $subHexLen; $i++) { $subHex = substr ($hex, $i * 8, 8); $int = 0x3FFFFFFF & (1 * ('0x'.$subHex)); $out = '';   for ($j = 0; $j < 6; $j++) { $val = 0x0000001F & $int; $out .= $base32[$val]; $int = $int >> 5; }   $output[] = $out; }   return $output; } [...] [...] 另一个算法来自http://www.snippetit.com/2009/04/php-short-url-algorithm-implementation/ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 function shorturl($input) { $base32 = array ( ‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’, ‘g’, ‘h’, ‘i’, ‘j’, ‘k’, ‘l’, ‘m’, ‘n’, ‘o’, ‘p’, ‘q’, ‘r’, ’s’, ‘t’, ‘u’, ‘v’, ‘w’, ‘x’, ‘y’, ‘z’, ‘0′, ‘1′, ‘2′, ‘3′, ‘4′, ‘5′ );   $hex = md5($input); $hexLen = strlen($hex); $subHexLen = $hexLen / 8; $output = array();   for ($i = 0; $i < $subHexLen; $i++) { $subHex = substr ($hex, $i * 8, 8); $int = 0×3FFFFFFF & (1 * (’0x’.$subHex)); $out = ”;   for ($j = 0; $j < 6; $j++) { $val = 0×0000001F & $int; $out .= $base32[$val]; $int = $int >> 5; }   $output[] = $out; }   return $output; } [...]

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