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<?php $matches = null; $returnValue = preg_match('/[<>"\\\/:=;]/', '//orba.pl/"\\ />\\', $matches); var_dump($returnValue, $matches);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Unknown modifier ':' in /in/iTsio on line 4 bool(false) NULL

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