1.2.551. Implements Is For Interface¶

With class heritage, implements should be used for interfaces, and extends with classes.

PHP defers the implements check until execution : the code in example does lint, but won,t run.

<?php

class x {
    function foo() {}
}

interface y {
    function foo();
}

// Use implements with an interface
class z implements y {}

// Implements is for an interface, not a class
class z implements x {}

?>

1.2.551.2. Connex PHP features¶

implements

interface

1.2.551.2.1. Suggestions¶

Create an interface from the class, and use it with the implements keyword

1.2.551.2.2. Specs¶

Short name	Classes/ImplementIsForInterface
Rulesets	All, Analyze, Changed Behavior
Exakat since	0.8.4
PHP Version	All
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	High
Available in	Entreprise Edition, Exakat Cloud