- var_dump: documentation ( source)
- spl_object_hash: documentation ( source)
<?php
$resolved = [
['field_test_alias_a'],
['field_test_alias_b'],
];
$hash_a = spl_object_hash((object) $resolved[0]);
$hash_b = spl_object_hash((object) $resolved[1]);
var_dump($hash_a);
var_dump($hash_b);
var_dump($hash_a === $hash_b);
var_dump($resolved[0] === $resolved[1]);