Question

How to use array_diff_key() function to get the difference between arrays using keys for comparison in PHP

Answer 1

$arr1 = array('aaa'  => 1, 'bbb'  => 2, 'ccc'  => 3, 'ddd' => 4);
$arr2 = array('ccc' => 5, 'aaa' => 6, 'ggg' => 7, 'fff' => 8);

var_dump(array_diff_key($arr1, $arr2));
   
/*
run: 

array(2) { ["bbb"]=> int(2) ["ddd"]=> int(4) } 

*/

 

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