PHP generate UUIDv4 - Space #1

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PHP generate UUIDv4 PHP 229
By IST on 2nd December 2019 10:02:46 PM

function guidv4($data = null) {
$data = $data ?? random_bytes(16);
assert(strlen($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));
}
$data = openssl_random_pseudo_bytes(16);
echo guidv4($data) . "\n";
echo guidv4() . "\n";

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