How Arrays Are Passed Through Arguments


How Arrays Are Passed Through Arguments? - PHP Script Tips - Creating Your Own Functions



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:

function shrink($array) {
$numbers = array(5, 7, 6, 2, 1, 3, 4, 2);
print("Before shrinking: ".join(",",$numbers)."\n");
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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