1.2.1395. Useless Global

Global are useless in two cases. First, on super-globals, which are always globals, like $_GET; secondly, on variables that are not used. Also, PHP has superglobals, a special team of variables that are always available, whatever the context. They are : $GLOBALS, $_SERVER, $_GET, $_POST, $_FILES, $_COOKIE, $_SESSION, $_REQUEST and $_ENV.

<?php

// $_POST is already a global : it is in fact a global everywhere
global $_POST;

// $unused is useless
function foo() {
    global $used, $unused;

    ++$used;
}

?>

1.2.1395.1. Connex PHP features

• super-global

• $_get

• $_post

• $_server

• $globals

• $_files

• $_cookie

• $_request

• $_env

1.2.1395.1.1. Suggestions

• Drop the global expression

1.2.1395.1.2. Specs

Short name	Structures/UselessGlobal
Rulesets	All, Analyze, Changed Behavior
Exakat since	0.8.4
PHP Version	All
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	Very high
Examples	Zencart, HuMo-Gen
Available in	Entreprise Edition, Exakat Cloud