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<?php $arr = array( array("A","B","C"), array("E","F","G") ); $result = array_map(function($strs){ return implode(',', $strs); }, $arr); var_dump($result);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(5) "A,B,C" [1]=> string(5) "E,F,G" }

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