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<?php $pat = ',(?P[[:alnum:]]+)/(?P[[:alnum:]]+)/(?P<$1>.*?),'; $str = 'controller1/action1/fff'; preg_match($pat, $str, $matches); print_r($matches);
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: preg_match(): Compilation failed: unrecognized character after (?P at offset 3 in /in/0IZCG on line 6
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: preg_match(): Compilation failed: unrecognized character after (?P at offset 3 in /in/0IZCG on line 6 Array ( )
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (?P at offset 3 in /in/0IZCG on line 6 Array ( )

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