1.2.966. Parent, Static Or Self Outside Class

Parent, static and self keywords must be used within a class, a trait, an interface or an enum. They make no sense outside a class or trait scope, as self and static refers to the current class and parent refers to one of parent above.

PHP 7.0 and later detect some of their usage at compile time, and emits a fatal error. Static may be used in a function or a closure <https://www.php.net/`closure>`_, but not globally.

<?php

class x {
    const Y = 1;

    function foo() {
        // self is \x
        echo self::Y;
    }
}

const Z = 1;
// This lint but won't anymore
echo self::Z;

?>

1.2.966.1. Related PHP errors

• Cannot access self:: when no class scope is active

• Cannot use “parent” when current class scope has no parent

1.2.966.2. Connex PHP features

• parent

• self

• static

• class

1.2.966.2.1. Suggestions

• Make sure the keyword is inside a class context

1.2.966.2.2. Specs

Short name	Classes/PssWithoutClass
Rulesets	All, Analyze, Changed Behavior
Exakat since	0.8.4
PHP Version	All
Severity	Major
Time To Fix	Quick (30 mins)
Changed Behavior	PHP 7.0
Precision	Very high
Available in	Entreprise Edition, Exakat Cloud