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<?php var_dump(preg_match_all('/\(([\d]+)\)/',$string,$matches));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $string in /in/Bsno7 on line 2 Deprecated: preg_match_all(): Passing null to parameter #2 ($subject) of type string is deprecated in /in/Bsno7 on line 2 int(0)

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