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<?php $strings = [ "quanity*price/2+tax", "quanity*price/2" ]; foreach ($strings as $string) { $keywords = preg_split("~[-*/+\d]+~", $string, -1, PREG_SPLIT_NO_EMPTY); print_r($keywords); }
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => quanity [1] => price [2] => tax ) Array ( [0] => quanity [1] => price )

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