Online PHP editor | refs for XImru

<?php $a = [ [ 'name' => 'Fred', 'age' => 20, 'test' => 'sa' ], [ 'name' => 'Alex', 'age' => 18, ], [ 'name' => 'Anna', 'age' => 24, ], [ 'name' => 'Tommy', 'age' => 22 ], [ 'name' => 'Amber', 'age' => 26 ] ]; $b = [ ['Fred'], ['Anna'], ['Alex'], ]; $lookup = array_column($a, null, 'name'); var_export( array_map( fn($name) => $lookup[$name[0]], $b ) );