1.2.831. No Readonly Assignation In Global¶

When a property is marked readonly, it may only be assigned within the class of definition.

It cannot be assigned outside this class, in the global scope. It is also immune to class invasion.

<?php

class x {
    public readonly int $p;

    function foo() {
        $this->p -= 1; // OK

        $x = new x;
        $x->p = 1;     // Not OK, even if $x is of type x
    }
}

$x = new x;
$x->p = 1;     // Not OK

?>

1.2.831.2. Connex PHP features¶

readonly

class-invasion

1.2.831.2.1. Specs¶

Short name	Classes/NoReadonlyAssignationInGlobal
Rulesets	All, Analyze, Changed Behavior, Class Review
Exakat since	2.4.2
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	Very high
Available in	Entreprise Edition, Exakat Cloud