FUNC_NUM_ARGS(3) 1 FUNC_NUM_ARGS(3)
func_num_args - Returns the number of arguments passed to the function
SYNOPSIS
int func_num_args (void )
DESCRIPTION
Gets the number of arguments passed to the function.
This function may be used in conjunction with func_get_arg(3) and func_get_args(3) 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.
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.3.0 | |
| | |
| | This function can now be used in parameter |
| | lists. |
| | |
| 5.3.0 | |
| | |
| | If this function is called from the outermost |
| | scope of a file which has been included by call- |
| | ing include(3) or require(3) from within a func- |
| | tion in the calling file, it now generates a |
| | warning and returns -1. |
| | |
+--------+---------------------------------------------------+
ERRORS
/EXCEPTIONS
Generates a warning if called from outside of a user-defined function.
EXAMPLES
Example #1
func_num_args(3) example
<?php
function foo()
{
$numargs = func_num_args();
echo "Number of arguments: $numargs
";
}
foo(1, 2, 3);
?>
The above example will output:
Number of arguments: 3
Example #2
func_num_args(3) example before and after PHP 5.3
test.php
<?php
function foo() {
include './fna.php';
}
foo('First arg', 'Second arg');
?>
fna.php
<?php
$num_args = func_num_args();
var_export($num_args);
?>
Output previous to PHP 5.3:
2
Output in PHP 5.3 and later will be something similar to:
Warning: func_num_args(): Called from the global scope - no function
context in /home/torben/Desktop/code/ml/fna.php on line 3
-1
NOTES
Note
Because this function depends on the current scope to determine parameter details, it cannot be used as a function parameter in ver-
sions prior to 5.3.0. If this value must be passed, the results should be assigned to a variable, and that variable should be
passed.
SEE ALSO
... syntax in PHP 5.6+, func_get_arg(3), func_get_args(3), ReflectionFunctionAbstract::getNumberOfParameters.
PHP Documentation Group FUNC_NUM_ARGS(3)
