No Assign Null From Method

PHP functions and methods may return null by not returning at all, or returning it explicitly. When they do so, the function may be called but no result should be assigned to a variable, as this is a waste of memory.

Methods that return null or some other result are not considered in this rule.

Rule Details

The following are considered a warning :

<?php

function x() { /* do Something Without Return */ }
function y() { /* do Something Without Return */; return null; }

$a = x();
$b[] = y();

?>

The following are OK :

<?php

function x($a) { 
	if ($a) {
		return 1;
	}  else {
		return null;
	}
}

$a = x(1);

?>