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<?php $pattern = '# \w*(?![0-9]{1}) (\w+)#'; $string = "PHP5 released PHP6 not released"; preg_match_all($pattern, $string, $matches); print_r($matches);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => released PHP6 [1] => not released ) [1] => Array ( [0] => PHP6 [1] => released ) )

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