Modifying an Array in a PHP Loop
Let's say we have the following array with numbers:
<?php
$arr = [1, 2, 3, 4, 5];
?>
Let's double each element of this array:
<?php
$arr = [1, 2, 3, 4, 5];
$arr[0] = $arr[0] * 2;
$arr[1] = $arr[1] * 2;
$arr[2] = $arr[2] * 2;
$arr[3] = $arr[3] * 2;
$arr[4] = $arr[4] * 2;
var_dump($arr); // will output [2, 4, 6, 8, 10]
?>
Now let's perform the same operation in a loop:
<?php
$arr = [1, 2, 3, 4, 5];
$length = count($arr);
for ($i = 0; $i < $length; $i++) {
$arr[$i] = $arr[$i] * 2;
}
var_dump($arr); // will output [2, 4, 6, 8, 10]
?>
Given an array with numbers. Loop through this array and square each element of this array.
