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<?php $url = 'http://klnk.fr/4'; preg_match('/http:\/\/klnk\.fr\/(?<mmBase>[0-9]+).*/', $url, $matches); var_dump($matches);
Output for 4.4.6 - 4.4.9, 5.2.2 - 7.1.0
array(3) { [0]=> string(16) "http://klnk.fr/4" ["mmBase"]=> string(1) "4" [1]=> string(1) "4" }
Output for 5.2.0 - 5.2.1
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 22 in /in/A1M18 on line 3 NULL
Output for 4.3.11 - 4.4.5, 5.0.0 - 5.1.6
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 22 in /in/A1M18 on line 3 array(0) { }
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (?< at offset 22 in /in/A1M18 on line 3 array(0) { }