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<?php $array = [ ["john", "alex", "tyler"], ["1", "2", "3"], ["brown", "yellow", "green"] ]; var_export( array_map(fn(...$elements) => implode(",", $elements), ...$array) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 'john,1,brown', 1 => 'alex,2,yellow', 2 => 'tyler,3,green', )

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