3v4l.org

run code in 300+ PHP versions simultaneously
<?php $keywords = array ('Rock', 'Paper', 'sciSSors'); $strings = array ( "This town rocks!", "Hello, world!", "Paper is patient", ); $rc = preg_grep( sprintf('/%s/i', implode('|', array_map('preg_quote', $keywords))), $strings ); var_dump($rc);

preferences:
34.54 ms | 408 KiB | 5 Q