array-merge.php

<?php

//Goal to merge $user['CustomFields'] with $customfields.

//fields from API
$customfields[] = (object) array('Key' => 'Email Lists', 'Value' => 'Events');
$customfields[] = (object) array('Key' => 'Office Affiliation', 'Value' => 'Oxford');
$customfields[] = (object) array('Key' => 'Office Affiliation', 'Value' => 'San Francisco');

//fields from form
$user['CustomFields'][] = array('Key' => 'Email Lists', 'Value' => 'Newsletter');
$user['CustomFields'][] = array('Key' => 'Email Lists', 'Value' => 'Events');
$user['CustomFields'][] = array('Key' => 'Office Affiliation', 'Value' => 'Oxford');

echo '<pre>';
print_r($customfields);
print_r($user['CustomFields']);
echo '</pre>';

foreach( $customfields as $customfield ){
  //echo $customfield->Value .'<br>';
	
	//find matches in array
	if(!in_array_recursive($customfield, $user['CustomFields'])) 
		$user['CustomFields'][] = array('Key' => $customfield->Key, 'Value' => $customfield->Value);
}
echo '<pre>Updated Version
';
print_r($user['CustomFields']);
echo '</pre>';

function in_array_recursive($needle, $haystack) {
	foreach ($haystack as $element) {
            if ((object) $element == (object) $needle) return true;
        }
        return false;
}