(PHP 5 >= 5.0.3, PHP 7) Gets number of required parameters

(PHP 5, PHP 7) Gets function name public string

(PHP 5, PHP 7) Checks if is internal public bool

(PHP 5, PHP 7) Gets file name public string

(PHP 5, PHP 7) Checks if returns reference public

(PHP 5 >= 5.6.0, PHP 7) Checks if the function is variadic

(PHP 5, PHP 7) Gets starting line number public

(PHP 5 >= 5.0.3, PHP 7) Gets number of parameters

(PHP 5 >= 5.3.0, PHP 7) Checks if function in namespace

(PHP 5, PHP 7) Clones function final private