Function with Undefined Number of Arguments in PHP

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Q

How To Define a Function with Any Number of Arguments? in PHP?

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A

If you want to define a function with any number of arguments, you need to:

Declare the function with no argument.
Call func_num_args() in the function to get the number of the arguments.
Call func_get_args() in the function to get all the arguments in an array.

Here is a PHP script on how to handle any number of arguments:

<?php
function myAverage() {
  $count = func_num_args();
  $args = func_get_args();
  $sum = array_sum($args);
  return $sum/$count;  
}
$average = myAverage(102, 121, 105);
print("Average 1: $average\n");
$average = myAverage(102, 121, 105, 99, 101, 110, 116, 101, 114);
print("Average 2: $average\n");
?>

This script will print:

Average 1: 109.33333333333
Average 2: 107.66666666667

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