<?
function guid(){
	mt_srand((double)microtime()*10000);
	//optional for php 4.2.0 and up.
	$charid = md5(uniqid(rand(), true));
	$hyphen = chr(45);
	// "-"
	$uuid =  substr($charid, 0, 8).$hyphen
			.substr($charid, 8, 4).$hyphen
			.substr($charid,12, 4).$hyphen
			.substr($charid,16, 4).$hyphen
			.substr($charid,20,12);
	return $uuid;
} 
echo guid();

?>

# xiaoxiao [ 2018-04-26 ]

# Address in this article

# http://www.s7smile.com/php/44

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