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.
Notatka: This function was added in PHP 4.
| Poprzedni | Spis treści | Następny |
| create_function | Początek rozdziału | func_get_args |