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Returns the number of arguments passed to the function (PHP 4, PHP 5)
int func_num_args ( )

Gets the number of arguments passed to the function.

This function may be used in conjunction with func_get_arg() and func_get_args() to allow user-defined functions to accept variable-length argument lists.

Return Values

Returns the number of arguments passed into the current user-defined function.


Generates a warning if called from outside of a user-defined function.


Example 760. func_num_args() example

function foo()
$numargs = func_num_args();
"Number of arguments: $numargs\n";

foo(1, 2, 3);    // Prints 'Number of arguments: 3'



Because this function depends on the current scope to determine parameter details, it cannot be used as a function parameter. If you must pass this value, assign the results to a variable, and pass the variable.