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PHP-W1035

Attribute class can not be used with propertyPHP-W1035

Major severityMajor
Bug Risk categoryBug Risk

This issue is raised when attribute used with the function doesn't have TARGET_PROPERTY as its scope. Therefore, an attempt to retrieve the metadata through reflection would result in a fatal error.

Apart from applying attributes to different entities in PHP, you can also define the scope of where a particular attribute should be used. This is achieved by passing special flags to the Attribute class and these include the following: Attribute::TARGET_METHOD, Attribute::TARGET_CLASS, Attribute::TARGET_FUNCTION, Attribute::TARGET_PROPERTY, Attribute::TARGET_CLASS_CONSTANT, Attribute::TARGET_PARAMETER, and Attribute::TARGET_ALL.

It is recommended to provide appropriate scope to the attribute.

Bad Practice

#[\Attribute(Attribute::TARGET_CLASS)]
class TestAttribute
{
    public function __construct(public string $testArgument)
    {}
}

Now, trying to apply the attribute to a property would result in an error since property isn't in the attribute scope.

class Cars
{

    #[TestAttribute('Hello World')]
    private $make;

}

References