Online PHP editor | refs for IvkY0

<?php $array1 = [ [536870914 => 34213897], [536870914 => 34213905], [536870915 => 34213921], [536870914 => 34213913], [536870915 => 34213929], [536870917 => 34213937], [536870925 => 34218049], ]; $array2 = [ 536870925, 536870914, 536870915, 536870917, ]; $array2 = array_flip($array2); usort($array1, function($a, $b) use ($array2) { return $array2[key($a)] <=> $array2[key($b)]; }); var_export($array1);