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<?php $arr1 = array( 0 => array(1, 2), 1 => array(5, 6) ); $arr2 = array( 0 => array(2, 3), 1 => array(6, 7) ); var_export( array_map( fn(...$rows) => array_values(array_unique(array_merge(...$rows))), $arr1, $arr2 ) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 0 => 1, 1 => 2, 2 => 3, ), 1 => array ( 0 => 5, 1 => 6, 2 => 7, ), )

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