(PHP 5)
ReflectionFunctionAbstract::getFileName — Gets file name
Gets the file name from a user-defined function.
本函数还未编写文档，仅有参数列表。
此函数没有参数。
The file name.
stein at visibone dot com (2013-07-04 22:53:36)
Returns FALSE for an internal function (when isInternal() returns TRUE, e.g. for 'strlen').