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 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
<?php $code = '<?php $code = %c%s%c; printf($code, 39, $code, 39);'; printf($code, 39, $code, 39);
preferences:
40.05 ms | 870 KiB | 4 Q