Returns the argument which is at the arg_num'th offset into a user-defined
function's argument list. Function arguments are counted
starting from zero. func_get_arg()
will generate a warning if called from outside of a function
definition.
If arg_num is greater
than the number of arguments actually passed, a warning will
be generated and func_get_arg() will
return FALSE.
?php function foo() { $numargs = func_num_args(); echo "Number of arguments: $numargs br \n"; if ($numargs = 2) { echo "Second argument is: " . func_get_arg (1) . " br \n"; } } foo (1, 2, 3); ? |
func_get_arg() may be used in
conjunction with func_num_args() and
func_get_args() to allow user-defined functions to
accept variable-length argument lists.
注: This function was added in PHP 4.