ReflectionProperty::isInitialized Checks whether a property is initialized &reftitle.description; public boolReflectionProperty::isInitialized objectobject Checks whether a property is initialized. &reftitle.parameters; object If the property is non-static an object must be provided to fetch the property from. &reftitle.returnvalues; Returns &false; for typed properties prior to initialization, and for properties that have been explicitly unset. For all other properties &true; will be returned. &reftitle.errors; Throws a ReflectionException if the property is inaccessible. You can make a protected or private property accessible using ReflectionProperty::setAccessible. &reftitle.examples; isInitialized($user)); $user->name = 'Nikita'; var_dump($rp->isInitialized($user)); ?> ]]> &example.outputs; &reftitle.seealso; ReflectionProperty::hasType