Description:
------------
Two if-clauses are not outputting the same result as they should.

Reproduce code:
---------------
<?php
$a = "abc";
$b = "abcd";

/* Example 1: */
if ($a != $b) {
	echo "This one doesn't.";
}

/* Example 2: */
if (! $a == $b) {
	echo "This works fine.";
}
?>

Expected result:
----------------
Both example 1 and 2 outputs the written strings.

Actual result:
--------------
Only example 1 outputs the expected result.