3v4l.org

run code in 500+ PHP versions simultaneously
<?php $code = '<?php $code = %c%s%c; printf($code, 39, $code, 39);'; printf($code, 39, $code, 39);
Output for 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
<?php $code = '<?php $code = %c%s%c; printf($code, 39, $code, 39);'; printf($code, 39, $code, 39);
preferences:
67.05 ms | 887 KiB | 4 Q