3v4l.org

run code in 300+ PHP versions simultaneously
<?php $pattern = <<<'PATTERN' /(?xJ) (?<DN>Mon|Fri|Sun)(?:day)?| (?<DN>Tue)(?:sday)?| (?<DN>Wed)(?:nesday)?| (?<DN>Thu)(?:rsday)?| (?<DN>Sat)(?:urday)? / PATTERN; $subject = "Monday\nThursday"; preg_match_all($pattern, $subject, $matches, PREG_PATTERN_ORDER); var_dump($matches);

preferences:
42.74 ms | 402 KiB | 5 Q