PHP 忒聊 綴豖 ヶ輛 func_num_args (PHP 4) Description Returns the number of arguments passed into the current user-defined function. func_num_args() will generate a warning if called from outside of a user-defined function. ?php function foo() {$numargs = func_num_args(); echo "Number of arguments: $numargs\n";} foo (1, 2, 3); // Prints 'Number of arguments: 3'? func_num_args() may be used in conjunction with func_get_arg() and func_get_args() to allow user-defined functions to accept variable-length argument lists. 綴豖 れ萸 ヶ輛 func_get_args 奻珨撰 function_exists