php uuid
function uuid($prefix = ''){
$chars = md5(uniqid(mt_rand(), true));
$uuid= substr($chars,0,8) . '-';
$uuid .= substr($chars,8,4) . '-';
$uuid .= substr($chars,12,4) . '-';
$uuid .= substr($chars,16,4) . '-';
$uuid .= substr($chars,20,12);
return $prefix . $uuid;
}
links
http://blog.longwin.com.tw/2008/09/uuid-generator-function-php-javascript-ruby-2008/
http://www.ajaxray.com/blog/2008/02/06/php-uuid-generator-function/http://www.soulhuntre.com/2004/10/29/uuid-guid-in-native-php/
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