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<?php $s = "__('This is a (TEST) all of this i want') i dont want any of this; __(extract this)"; if (preg_match_all('~__(\(((?:[^()]++|(?1))*)\))~', $s, $matches)) { print_r($matches[2]); }
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 'This is a (TEST) all of this i want' [1] => extract this )

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