How Arrays Are Passed Through Arguments
Q
How Arrays Are Passed Through Arguments? - PHP Script Tips - Creating Your Own Functions
✍: 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.
2007-04-24, 5160👍, 0💬
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