function guid( $opt = true ){ ??????// ?Set to true/false as your default way to do this. ???if( function_exists(‘com_create_guid‘) ){ ???????if( $opt ){ return com_create_guid(); } ???????????else { return trim( com_create_guid(), ‘{}‘ ); } ???????} ???????else { ???????????mt_srand( (double)microtime() * 10000 ); ???// optional for php 4.2.0 and up. ???????????$charid = strtoupper( md5(uniqid(rand(), true)) ); ???????????$hyphen = chr( 45 ); ???// "-" ???????????$left_curly = $opt ? chr(123) : ""; ????// ?"{" ???????????$right_curly = $opt ? chr(125) : ""; ???// ?"}" ???????????$uuid = $left_curly ???????????????. substr( $charid, 0, 8 ) . $hyphen ???????????????. substr( $charid, 8, 4 ) . $hyphen ???????????????. substr( $charid, 12, 4 ) . $hyphen ???????????????. substr( $charid, 16, 4 ) . $hyphen ???????????????. substr( $charid, 20, 12 ) ???????????????. $right_curly; ???????????return $uuid; ???????????}}php 生成 guid
原文地址：https://www.cnblogs.com/xiaoyucoding/p/9626914.html