<?php
$p = '~(?J)(z?)((?1)(?P<group>b)|(?P<group>a))ba~'; // works
//$p = '~(?J)(z?)((?1)(?P<group>b)|(?P<group>a))b(?P=group)~'; // fails
$s = 'aba';
if (preg_match($p, $s, $m)) {
var_dump($m);
}
- Output for 4.4.5 - 4.4.9, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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(6) {
[0]=>
string(3) "aba"
[1]=>
string(0) ""
[2]=>
string(1) "a"
["group"]=>
string(1) "a"
[3]=>
string(0) ""
[4]=>
string(1) "a"
}
- Output for 4.3.11, 4.4.0 - 4.4.4, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
- Warning: preg_match(): Compilation failed: unrecognized character after (? at offset 2 in /in/jffS4 on line 8
- Output for 4.3.0 - 4.3.10
- Warning: Compilation failed: unrecognized character after (? at offset 2 in /in/jffS4 on line 8
preferences:
272.76 ms | 401 KiB | 456 Q