- var_dump: documentation ( source)
- array_diff: documentation ( source)
<?php
$array1 = array(
'shopify_product_id' => "369708720",
'shopify_item_id' => "957453564",
'sku' => "SBXX001"
);
$array2 = array(
'shopify_product_id' => "218014361",
'shopify_item_id' => "490326013",
'sku' => "ATTXLL001"
);
$diff = array_diff($array1, $array2);
var_dump($diff);