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run code in 300+ PHP versions simultaneously
<?php preg_match('%<((?i)password(?-i))>\s*+(?P<password>.*?)\s*</\1>%x', '<Password> toto </Password>', $match); var_dump($match);
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(4) { [0]=> string(30) "<Password> toto </Password>" [1]=> string(8) "Password" ["password"]=> string(4) "toto" [2]=> string(4) "toto" }
Output for 4.3.0 - 4.3.2
array(3) { [0]=> string(30) "<Password> toto </Password>" [1]=> string(8) "Password" [2]=> string(4) "toto" }

preferences:
247.49 ms | 401 KiB | 353 Q