What are the recommended approaches for handling class modifications and method existence checks in PHP code generators?

When generating PHP code dynamically, it's important to handle class modifications and method existence checks to ensure the generated code is valid and error-free. One approach is to use reflection to check if a class or method exists before generating code that references them. This helps prevent fatal errors or unexpected behavior when the generated code is executed.

// Check if a class exists before referencing it in generated code
if (class_exists('MyClass')) {
    // Generate code that uses the class
    $generatedCode .= 'new MyClass();';
}

// Check if a method exists before calling it in generated code
if (method_exists('MyClass', 'myMethod')) {
    // Generate code that calls the method
    $generatedCode .= 'MyClass::myMethod();';
}