3v4l.org

run code in 500+ PHP versions simultaneously
<?php $s1 = 'natujeszczak'; $s2 = 'piekierski'; echo similar_text($s1, $s2), PHP_EOL, similar_text($s2, $s1), PHP_EOL, PHP_VERSION;

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22.53 ms | 474 KiB | 4 Q