3v4l.org

run code in 300+ PHP versions simultaneously
<?php $val1 = "42 Day"; $val2 = "3 week;stuff"; $opts = ['regexp' => "/^[0-9]+ (month|day|hour)$/i"]; $f1 = filter_var($val1, FILTER_VALIDATE_REGEXP, ['options' => $opts]); $f2 = filter_var($val2, FILTER_VALIDATE_REGEXP, ['options' => $opts]); var_dump($f1); var_dump($f2);

preferences:
32.65 ms | 402 KiB | 5 Q