StaticPropertyRedeclarationMismatch

A static property in a child class conflicts with the parent’s declaration, such as incompatible types or modifiers.

Example

<?php
class Parent {
    public static string $name;
}

class Child extends Parent {
    public static int $name; // Error: incompatible type
}

How to fix

Ensure the child class static property type is compatible with the parent:

<?php
class Parent {
    public static string $name;
}

class Child extends Parent {
    // Keep the same type
    public static string $name;
}