ReflectionClass::isInternal Checks if class is defined internally by an extension, or the core &reftitle.description; public boolReflectionClass::isInternal Checks if the class is defined internally by an extension, or the core, as opposed to user-defined. &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; &return.success; &reftitle.examples; isInternal()); var_dump($userclass->isInternal()); ?> ]]> &example.outputs; &reftitle.seealso; ReflectionClass::isUserDefined