property_exists
Introducción
Variable and Type Related Extensions
PHP Manual

# Classkit

- Introducción
- Installing/Configuring
  - Requisitos
  - Instalación
  - Configuración en tiempo de ejecución
  - Tipos de recursos
- Constantes predefinidas
- Classkit Functions
  - classkit_import — Import new class method definitions from a file
  - classkit_method_add — Dynamically adds a new method to a given class
  - classkit_method_copy — Copies a method from class to another
  - classkit_method_redefine — Dynamically changes the code of the given method
  - classkit_method_remove — Dynamically removes the given method
  - classkit_method_rename — Dynamically changes the name of the given method

property_exists
Introducción
Variable and Type Related Extensions
PHP Manual