Description:
------------
---
From manual page: http://www.php.net/function.array-merge#refsect1-function.array-
merge-description
---


Test script:
---------------
foreach($cols as $key => &$value) {
	if(array_key_exists($key, $fields)) {
		$value = array_merge($fields[$key], $value);
	}
}
			
foreach($fields as $key => $value) {
	if(!array_key_exists($key, $cols)) {
		$cols[$key] = $value;
	}
}

Expected result:
----------------
Expected result is that col becomes is an array with all the values that where 
already defined added with the values from fields.

Actual result:
--------------
The sub-array in cols wich was merged with the same sub-array in fields becomes 
overwritten everytime the next foreach statement accesses the value $value, witch 
result. the fix for this is to have a diffrent name for the array merging, this 
leads me to belive that array_merge keeps re-evaluating the values.