ReflectionExtension::isPersistent Returns whether this extension is persistent &reftitle.description; public voidReflectionExtension::isPersistent &warn.undocumented.func; &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; Returns &true; for extensions loaded by extension, &false; otherwise. &reftitle.seealso; ReflectionExtension::isTemporary