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);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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
array(7) { [0]=> array(2) { [0]=> string(6) "Monday" [1]=> string(8) "Thursday" } ["DN"]=> array(2) { [0]=> string(0) "" [1]=> string(0) "" } [1]=> array(2) { [0]=> string(3) "Mon" [1]=> string(0) "" } [2]=> array(2) { [0]=> string(0) "" [1]=> string(0) "" } [3]=> array(2) { [0]=> string(0) "" [1]=> string(0) "" } [4]=> array(2) { [0]=> string(0) "" [1]=> string(3) "Thu" } [5]=> array(2) { [0]=> string(0) "" [1]=> string(0) "" } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_SL in /in/RiJpq on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_SL in /in/RiJpq on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/RiJpq on line 3
Process exited with code 255.

preferences:
199.95 ms | 401 KiB | 311 Q