src/Auth.php
public static function createUuid() {
		$data = \openssl_random_pseudo_bytes(16);

		// set the version to 0100
		$data[6] = \chr(\ord($data[6]) & 0x0f | 0x40);
		// set bits 6-7 to 10
		$data[8] = \chr(\ord($data[8]) & 0x3f | 0x80);

		return \vsprintf('%s%s-%s-%s-%s-%s%s%s', \str_split(\bin2hex($data), 4));
	}
public static function createUuid() {
		$data = \openssl_random_pseudo_bytes(16);

		// set the version to 0100
		$data[6] = \chr(\ord($data[6]) & 0x0f | 0x40);
		// set bits 6-7 to 10
		$data[8] = \chr(\ord($data[8]) & 0x3f | 0x80);

		return \vsprintf('%s%s-%s-%s-%s-%s%s%s', \str_split(\bin2hex($data), 4));
	}
public static function createUuid ( ) { $ data = \ openssl_random_pseudo_bytes ( 16 ) ; // set the version to 0100 $ data [ 6 ] = \ chr ( \ ord ( $ data [ 6 ] ) & 0x0f | 0x40 ) ; // set bits 6-7 to 10 $ data [ 8 ] = \ chr ( \ ord ( $ data [ 8 ] ) & 0x3f | 0x80 ) ; return \ vsprintf ( '%s%s-%s-%s-%s-%s%s%s' , \ str_split ( \ bin2hex ( $ data ) , 4 ) ) ; }
Creates a UUID v4 as per RFC 4122

The UUID contains 128 bits of data (where 122 are random), i.e. 36 characters

@return string the UUID
@author Jack @ Stack Overflow
Creates a UUID v4 as per RFC 4122