3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(stream_socket_client('udp://127.0.0.1:13', $errorCode, $errorMessage), $errorCode, $errorMessage);
Output for 8.1.32, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Warning: stream_socket_client(): Unable to connect to udp://127.0.0.1:13 (Unknown error) in /in/TmSQQ on line 3 bool(false) int(0) string(0) ""
preferences:
55.02 ms | 406 KiB | 5 Q