1.2.590. Interfaces Is Not Implemented

Classes that implements interfaces, must implements each of the interface’s methods. Otherwise, the class shall be marked as abstract. This problem tends to occur in code that splits interfaces and classes by file. This means that PHP’s linting will skip the definitions and not find the problem. At execution time, the definitions will be checked, and a Fatal error will occur.

This situation usually detects code that was forgotten during a refactorisation of the interface or the class and its siblings.

<?php

class x implements i {
    // This method implements the foo method from the i interface
    function foo() {}

    // The method bar is missing, yet is requested by interface i
    function foo() {}
}

interface i {
    function foo();
    function bar();
}

?>

See also Interfaces.

1.2.590.2. Connex PHP features

1.2.590.2.1. Suggestions

  • Implements all the methods from the interfaces

  • Remove the class

  • Make the class abstract

  • Make the missing methods abstract

1.2.590.2.2. Specs

Short name

Interfaces/IsNotImplemented

Rulesets

All, Analyze, CE, CI-checks, Changed Behavior, Class Review, LintButWontExec

Exakat since

1.9.5

PHP Version

All

Severity

Minor

Time To Fix

Quick (30 mins)

Precision

High

Note

This issue may lint but will not run

Available in

Entreprise Edition, Community Edition, Exakat Cloud