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<?php $string = 'categoryparameterusedpricing_15'; // look for a match preg_match("/[categoryparameterusedpricing_\d]/", $key, $matches); echo $matches[1];
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $key in /in/YpqV4 on line 6 Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /in/YpqV4 on line 6 Warning: Undefined array key 1 in /in/YpqV4 on line 7

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