Modifying Array Elements in PHP
Array elements can be modified similarly to modifying string characters:
<?php
$arr = ['a', 'b', 'c'];
$arr[0] = '!';
var_dump($arr); // outputs ['!', 'b', 'c']
?>
Given the following array:
<?php
$arr = ['a' => 1, 'b' => 2, 'c' => 3];
?>
Change the value of each element of this array.
