Gets the specified argument from a user-defined function's argument list.
This function may be used in conjunction with
func_get_args() and func_num_args()
to allow user-defined functions to accept variable-length argument lists.
Parameters
arg_num
The argument offset. Function arguments are counted starting from
zero.
Return Values
Returns the specified argument, or FALSE on error.
ChangeLog
Version
Description
5.3.0
This function can now be used in parameter lists.
Errors/Exceptions
Generates a warning if called from outside of a user-defined function, or
if arg_num
is greater than the number of arguments
actually passed.
Examples
Example #1 func_get_arg() example
<?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); ?>
Notes
Note: Because this function depends on the
current scope to determine parameter details, it cannot be used as a
function parameter. If this value must be passed, the results should be assigned
to a variable, and that variable should be passed.
Note:
This function returns a copy of the passed arguments only, and does not
account for default (non-passed) arguments.
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