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<?php $hex = "abba test baab"; $hex = array_map(function ($x) { return ($x === 'a') ? 'b' : (($x === 'b') ? 'a' : $x); }, str_split($hex)); echo implode('', $hex);
Output for git.master, git.master_jit, rfc.property-hooks
baab test abba

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