3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'fdfqsdfqsdf%A%2%B%4%C%D%7sddsdfsdf'; $res = preg_replace_callback(',%.?,', function (array $matches) { if (preg_match(',%\d+,', $matches[0])) { return 'FOO'; } }, $str); echo $res; $res = preg_replace_callback(',%\d+?,', function (array $matches) { return 'FOO'; }, $str); echo $res;
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
fdfqsdfqsdfFOOFOOFOOsddsdfsdffdfqsdfqsdf%AFOO%BFOO%C%DFOOsddsdfsdf
preferences:
229.69 ms | 404 KiB | 330 Q