1.2.1273. Unresolved Instanceof¶
The instanceof operator doesn’t confirm if the compared class exists.
It checks if an variable is of a specific class. However, if the referenced class doesn’t exist, because of a bug, a missed inclusion or a typo, the operator always fails, without a warning. Make sure the following classes are well defined.
<?php
namespace X {
class C {}
// This is OK, as C is defined in X
if ($o instanceof C) { }
// This is not OK, as C is not defined in global
// instanceof respects namespaces and use expressions
if ($o instanceof \C) { }
// This is not OK, as undefinedClass
if ($o instanceof undefinedClass) { }
// This is not OK, as $class is now a full namespace. It actually refers to \c, which doesn't exist
$class = 'C';
if ($o instanceof $class) { }
}
?>
See also Instanceof.
1.2.1273.1. Suggestions¶
Remove the call to instanceof and all its dependencies.
Fix the class name and use a class existing in the project.
1.2.1273.2. Specs¶
Short name |
Classes/UnresolvedInstanceof |
Rulesets |
|
Exakat since |
0.8.4 |
PHP Version |
All |
Severity |
Major |
Time To Fix |
Instant (5 mins) |
Precision |
Very high |
Features |
instanceof |
ClearPHP |
|
Examples |
|
Available in |