Returns FALSE for an internal function (when isInternal() returns TRUE, e.g. for 'strlen').
(PHP 5, PHP 7)
ReflectionFunctionAbstract::getFileName — Gets file name
Gets the file name from a user-defined function.
This function is currently not documented; only its argument list is available.
This function has no parameters.
The file name.
Returns FALSE for an internal function (when isInternal() returns TRUE, e.g. for 'strlen').