- var_dump: documentation ( source)
- array_merge: documentation ( source)
<?php
$a = ['invitedEmail' => 'asd@asd.pl', 'pending' => true];
$b = ['createdAt' => '12', 'deletedAt' => '11', 'pending' => false];
var_dump($a + $b);
var_dump(array_merge($a, $b));