1.2.1416. Using $this Outside A Class¶
$this is a special variable, that should only be used in a class context.
Until PHP 7.1, $this may be used as an argument in a function or a method, a global, a static : while this is legit, it sounds confusing enough to avoid it.
Starting with PHP 7.1, the PHP engine check thoroughly that $this is used in an appropriate manner, and raise fatal errors in case it isn’t.
Yet, it is possible to find $this outside a class : if the file is included inside a class, then $this will be recognized and validated. If the file is included outside a class context, it will yield a fatal error : Using `$this <https://www.php.net/manual/en/language.oop5.basic.php>`_ when not in object context.
<?php
function foo($this) {
echo $this;
}
// A closure can be bound to an object at later time. It is valid usage.
$closure = function ($x) {
echo $this->foo($x);
}
?>
See also Closure::bind and The Basics.
1.2.1416.2. Connex PHP features¶
1.2.1416.2.1. Specs¶
Short name |
Classes/UsingThisOutsideAClass |
Rulesets |
All, Analyze, Changed Behavior, CompatibilityPHP71, LintButWontExec |
Exakat since |
0.8.4 |
PHP Version |
With PHP 7.0 and older |
Severity |
Critical |
Time To Fix |
Instant (5 mins) |
Changed Behavior |
PHP 7.1 |
Precision |
High |
Note |
This issue may lint but will not run |
Available in |