Creation of dynamic property %s::$%s is deprecated

Description

When PHP uses an undefined property for a writing access, it used to create that property on the fly. The property is created with public visibility, not type nor default value.

Since PHP 8.2, this is a deprecated feature. In a later version, by default, dynamic properties will be forbidden, and activated case by case, using sdtClass or the #[AllowDynamicProperties] attribute.

Example

<?php

class X {
    public $property = 1;
}

$x = new X;
$x->property = 2;
// This is a dynamic property
$x->other = 3;

?>

Solutions

• Declare the property in the class definition.

• Create an array and store the properties there.

• Create a stdClass object and store the properties there.

• Add the #[AllowDynamicProperties].