Description:
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I'm not sure if this is a bug or not but the bottom code works fine... The top one I try to merge two statements and it does not work...

Shows Strict Standards: Only variables should be passed by reference in z.php on line 3

But it works if you separate the statements...

I know this is not how you would normally code any of this stuff... It just seems weird there is an error...

Reproduce code:
---------------
<?php
	$file = '/path/to/some/file.ext';
	$extension = array_pop($fileParts = explode('.', basename($file)));			//Strict Standards: Only variables should be passed by reference in z.php on line 3
	echo $extension . "\n";		// This works, echoes 'ext'
	echo count($fileParts);		// Value is 2
?>

<?php
	$file = '/path/to/some/file.ext';
	$fileParts = explode('.', basename($file));
	$extension = array_pop($fileParts);
	echo $extension . "\n";		// This works, echoes 'ext'
	echo count($fileParts);		// Value is 1
?>

Expected result:
----------------
I expect not to get a strict error cause both are the same... If it works for the bottom one, it should work for the top one...