array_merge() no longer accepts non-array parameters to merge.
<?php
$scandinavia = array('Denmark', 'Norway', 'Finland');
$uk = "The UK";
$europe = array_merge($scandinavia, $uk);
print_r($europe);
?>
PHP 4:
Array
(
[0] => Denmark
[1] => Norway
[2] => Finland
[3] => The UK
)
PHP 5:
Warning: array_merge(): Argument #2 is not an array in - on line 7