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<?php $str = <<<EOF aaaBbb = CccBbb aaaDddd = CccDddd aaaEeee = CccFfff EOF; preg_match_all('/^ +\w+([A-Z][a-z]+) += +(?!\w+\1).*$/m', $str, $matches, PREG_SET_ORDER, 0); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> array(2) { [0]=> string(21) " aaaEeee = CccFfff" [1]=> string(4) "Eeee" } }

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