1.2.507. Global Inside Loop

The global and static keywords must be used outside loops. Otherwise, they are evaluated at each loop, slowing the whole process. This is a micro-optimisation.

<?php

// Here, global is used once
global $total;
foreach($a as $b) {
    $total += $b;
}

// Global is called each time : this is slow.
foreach($a as $b) {
    global $total;
    $total += $b;
}
?>

1.2.507.1. Suggestions

• Move the global keyword outside the loop

1.2.507.2. Specs

Short name	Structures/GlobalOutsideLoop
Rulesets	All, Changed Behavior, Performances
Exakat since	0.8.4
PHP Version	All
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	Very high
Available in	Entreprise Edition, Exakat Cloud