Are there any potential pitfalls to be aware of when calling methods within a PHP class?

One potential pitfall to be aware of when calling methods within a PHP class is ensuring that the method exists before calling it to avoid a fatal error. This can be achieved by using the method_exists() function to check if the method exists in the class before calling it.

class MyClass {
    public function myMethod() {
        // Check if the method exists before calling it
        if (method_exists($this, 'myMethod')) {
            $this->myMethod();
        } else {
            echo 'Method does not exist';
        }
    }
}