3v4l.org

run code in 500+ PHP versions simultaneously
<?php $strings = [ 'a', 'ab', 'abc' ]; var_export(preg_replace('/(.)(.*)(.)/', '$3$2$1', $strings));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 0 => 'a', 1 => 'ba', 2 => 'cba', )

preferences:
77.16 ms | 1105 KiB | 4 Q