PHP prev() Function: Move an Array’s Internal Pointer Backward

The mixed prev(array &$array) function moves the internal pointer of the given array one position backward.

Explanation: It behaves similarly to next() but decrements the pointer instead of advancing it.

Parameter: array – the array whose pointer will be affected.

Return value: The value of the array element now pointed to, or FALSE if the pointer is beyond the first element.

Example:

<?php
$transport = array('foot','bike','car','plane');
$mode = current($transport);
// $mode = 'foot';
$mode = next($transport);
// $mode = 'bike';
$mode = next($transport);
// $mode = 'car';
$mode = prev($transport);
// $mode = 'bike';
$mode = end($transport);
// $mode = 'plane';
?>

This example creates an array of transport modes, uses current() to get the first element, advances the pointer with next(), moves it back with prev(), and finally jumps to the last element with end().