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<?php $colours = array("Red", "Blue", "Green"); $string = "There are three Red and Green walls."; echo preg_replace("/\b(?:" . implode('|', $colours) . ")\b/", '%1%$0%2%', $string);
Output for git.master, git.master_jit, rfc.property-hooks
There are three %1%Red%2% and %1%Green%2% walls.

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