Removing array values

To change a certain value, assign a new value to that element using its key. To remove a key/value pair, call the unset() function on it.
<?php
$arr = array(5 => 1, 12 => 2);

$arr[] = 56;    // This is the same as $arr[13] = 56;
// at this point of the script

$arr[“x”] = 42; // This adds a new element to
// the array with key “x”

unset($arr[5]); // This removes the element from the array

unset($arr);    // This deletes the whole array
?>