What are the best practices for ensuring compatibility between methods in PHP classes, as highlighted in the error message?

To ensure compatibility between methods in PHP classes, it is important to make sure that methods with the same name in parent and child classes have the same signature (number of parameters and their types). This helps prevent errors related to method overriding and ensures that the child class method properly overrides the parent class method.

class ParentClass {
    public function method($param) {
        // Parent class method implementation
    }
}

class ChildClass extends ParentClass {
    public function method($param) {
        // Child class method implementation
    }
}