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run code in 150+ php & hhvm versions
Bugs & Features
<?php class UUID { public static function v3($namespace, $name) { if(!self::is_valid($namespace)) return false; // Get hexadecimal components of namespace $nhex = str_replace(array('-','{','}'), '', $namespace); // Binary Value $nstr = ''; // Convert Namespace UUID to bits for($i = 0; $i < strlen($nhex); $i+=2) { $nstr .= chr(hexdec($nhex[$i].$nhex[$i+1])); } // Calculate hash value $hash = md5($nstr . $name); return sprintf('%08s-%04s-%04x-%04x-%12s', // 32 bits for "time_low" substr($hash, 0, 8), // 16 bits for "time_mid" substr($hash, 8, 4), // 16 bits for "time_hi_and_version", // four most significant bits holds version number 3 (hexdec(substr($hash, 12, 4)) & 0x0fff) | 0x3000, // 16 bits, 8 bits for "clk_seq_hi_res", // 8 bits for "clk_seq_low", // two most significant bits holds zero and one for variant DCE1.1 (hexdec(substr($hash, 16, 4)) & 0x3fff) | 0x8000, // 48 bits for "node" substr($hash, 20, 12) ); } public static function v4() { return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x', // 32 bits for "time_low" mt_rand(0, 0xffff), mt_rand(0, 0xffff), // 16 bits for "time_mid" mt_rand(0, 0xffff), // 16 bits for "time_hi_and_version", // four most significant bits holds version number 4 mt_rand(0, 0x0fff) | 0x4000, // 16 bits, 8 bits for "clk_seq_hi_res", // 8 bits for "clk_seq_low", // two most significant bits holds zero and one for variant DCE1.1 mt_rand(0, 0x3fff) | 0x8000, // 48 bits for "node" mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff) ); } public static function v5($namespace, $name) { if(!self::is_valid($namespace)) return false; // Get hexadecimal components of namespace $nhex = str_replace(array('-','{','}'), '', $namespace); // Binary Value $nstr = ''; // Convert Namespace UUID to bits for($i = 0; $i < strlen($nhex); $i+=2) { $nstr .= chr(hexdec($nhex[$i].$nhex[$i+1])); } // Calculate hash value $hash = sha1($nstr . $name); return sprintf('%08s-%04s-%04x-%04x-%12s', // 32 bits for "time_low" substr($hash, 0, 8), // 16 bits for "time_mid" substr($hash, 8, 4), // 16 bits for "time_hi_and_version", // four most significant bits holds version number 5 (hexdec(substr($hash, 12, 4)) & 0x0fff) | 0x5000, // 16 bits, 8 bits for "clk_seq_hi_res", // 8 bits for "clk_seq_low", // two most significant bits holds zero and one for variant DCE1.1 (hexdec(substr($hash, 16, 4)) & 0x3fff) | 0x8000, // 48 bits for "node" substr($hash, 20, 12) ); } public static function is_valid($uuid) { return preg_match('/^\{?[0-9a-f]{8}\-?[0-9a-f]{4}\-?[0-9a-f]{4}\-?'. '[0-9a-f]{4}\-?[0-9a-f]{12}\}?$/i', $uuid) === 1; } } // Usage // Named-based UUID. print UUID::v5('1546058f-5a25-4334-85ae-e68f2a44bbaf', 'SomeRandomString'); // Pseudo-random UUID ?>
Output for 5.0.0 - 5.6.21, hhvm-3.12.0, 7.0.0 - 7.1.0
c8333619-8220-5b21-b5d9-2bd56713675a
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/haRUv on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/haRUv on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/haRUv on line 3
Process exited with code 255.