1.2.1449. Wrong Typed Property Default

Property is typed, yet receives an incompatible value at constructor time.

Initialized type might be a new instance, the return of a method call or an interface compatible object.

PHP compiles such code, but won’t execute it, as it detects the incompatibility at execution time.

<?php

class x {
    private A $property;
    private B $incompatible;

    function __construct() {
        // This is compatible
        $this->property = new A();

        // This is incompatible : new B() expected
        $this->incompatible = new C();

    }
}

?>

See also Wrong Type Returned and Mismatch Type And Default.

1.2.1449.1. Suggestions

• Remove the type hint of the property

• Fix the initialization call

• Use an interface for typehint

1.2.1449.2. Specs

Short name	Classes/WrongTypedPropertyInit
Rulesets	All, Analyze, CE, CI-checks, Class Review, LintButWontExec
Exakat since	2.0.9
PHP Version	With PHP 7.4 and more recent
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	High
Features	default-value
Note	This issue may lint but will not run
Available in	Entreprise Edition, Community Edition, Exakat Cloud