Attempt to unset static property

Description

It is not possible to unset a static property. The best solution is to set it to null.

The property might be not set: this happens between the definition of the property, and its first assignation. But once set, that property cannot be unset.

On the other hand, it is possible to unset a property. This usually leads to confusion.

Example

<?php

class x {
    static $y = 1;
}

unset(x::$y);

?>

Solutions

• Set the static property the NULL value.

• Use another property to mark this one as unset.

• Convert the property to an object, that can be unset.

• Use an array in that property, and unset one of its element.