--- /dev/null
+--TEST--
+ReflectionFunction::getExtension()
+--FILE--
+<?php
+function foo () {}
+
+$function = new ReflectionFunction('sort');
+var_dump($function->getExtension());
+
+$function = new ReflectionFunction('foo');
+var_dump($function->getExtension());
+?>
+--EXPECTF--
+object(ReflectionExtension)#%i (1) {
+ ["name"]=>
+ string(8) "standard"
+}
+NULL
+
--- /dev/null
+--TEST--
+ReflectionFunction::getExtensionName()
+--FILE--
+<?php
+function foo() {}
+
+$function = new ReflectionFunction('sort');
+var_dump($function->getExtensionName());
+
+$function = new ReflectionFunction('foo');
+var_dump($function->getExtensionName());
+?>
+--EXPECT--
+string(8) "standard"
+bool(false)
+