1--TEST-- 2ReflectionFunction::getExtensionName() 3--FILE-- 4<?php 5function foo() {} 6 7$function = new ReflectionFunction('sort'); 8var_dump($function->getExtensionName()); 9 10$function = new ReflectionFunction('foo'); 11var_dump($function->getExtensionName()); 12?> 13--EXPECT-- 14string(8) "standard" 15bool(false) 16 17