3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = '😍'; echo bin2hex($input) . PHP_EOL; echo json_encode($input) . PHP_EOL; echo json_encode($input[0] . $input[1] . $input[2] . $input[3]) . PHP_EOL;

preferences:
33.74 ms | 402 KiB | 5 Q