1.2.328. Declare Global Early

Static and global keywords should be used as early as possible in a method.

Performance wise, it is better to call global or static only before using the variable.

Human-wise, it is recommended to put global or static at the beginning of the method, for better readability.

<?php

function foo() {
    // $a is not global yet. It is a local variable
    $a = 1;
    // Same for static variables
    $s = 5;

    // Now $a is global
    global $a;
    $a = 3;

    // Now $s is static
    static $s;
    $s = 55;
}

?>

See also Using static variables and The global keyword.

1.2.328.1. Connex PHP features

• static-variable

• global-variable

1.2.328.1.1. Suggestions

• Use static and global at the beginning of the method

• Move static and global to the first usage of the variable

• Remove any access to the variable before static and global

1.2.328.1.2. Specs

Short name	Structures/VariableMayBeNonGlobal
Rulesets	All, Changed Behavior
Exakat since	1.5.3
PHP Version	All
Severity	Minor
Time To Fix	Instant (5 mins)
Precision	Very high
Available in	Entreprise Edition, Exakat Cloud