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AyrA/guid.php

Last active November 1, 2017 20:09
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PHP UUID Generator
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guid.php
<?php
//Generates cryptographically safe UUIDv4 (sometimes called GUID)
function guid()
{
$data=random_bytes(16);
assert(strlen($data)===16);
$data[6]=chr(ord($data[6])&0x0f|0x40); //set version to 0100
$data[8]=chr(ord($data[8])&0x3f|0x80); //set bits 6-7 to 10
return vsprintf('%s%s-%s-%s-%s-%s%s%s',str_split(bin2hex($data),4));
}
?>
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