1.2.943. PHP Native Interfaces and Return Type¶
Native PHP interface which define a type, expect the derived methods to use the same time. In particular, a mixed return type was added to the jsonSerialize() of the JsonSerialize PHP interface.
In PHP 8.1, the mixed return type is now enforced, and a deprecated notice is displayed.
One solution is to add the good return type, or to use the #[`ReturnTypeWillChange]` attribute. This rule covers the following interfaces :
<?php
class MyJsonSerialize implements jsonserialize {
function jsonserialize() : int {}
}
?>
See also JsonSerializable::jsonSerialize.
1.2.943.1. Suggestions¶
Add the mixed returntype to all implementation of the jsonSerialize method
Add the #[ReturnTypeWillChange] attribute to the method
1.2.943.2. Specs¶
Short name |
Php/JsonSerializeReturnType |
Rulesets |
All, Analyze, Changed Behavior, CompatibilityPHP81, Deprecated, LintButWontExec |
Exakat since |
2.3.0 |
PHP Version |
With PHP 8.0 and more recent |
Severity |
Minor |
Time To Fix |
Quick (30 mins) |
Precision |
Very high |
Features |
json |
Note |
This issue may lint but will not run |
Available in |