Passing Arrays by Values to Functions in PHP

Q

How Arrays Are Passed Through Arguments? in PHP?

✍: FYIcenter.com

A

Like a normal variable, an array is passed through an argument by value, not by reference. That means when an array is passed as an argument, a copy of the array will be passed into the function. Modifying that copy inside the function will not impact the original copy. Here is a PHP script on passing arrays by values:

<?php
function shrink($array) {
  array_splice($array,1);
}
$numbers = array(5, 7, 6, 2, 1, 3, 4, 2);
print("Before shrinking: ".join(",",$numbers)."\n");
shrink($numbers);
print("After shrinking: ".join(",",$numbers)."\n");
?>

This script will print:

Before shrinking: 5,7,6,2,1,3,4,2
After shrinking: 5,7,6,2,1,3,4,2

As you can see, original variables were not affected.

 

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2016-12-18, 338👍, 0💬