prev
(PHP 4, PHP 5)
prev — Rewind the internal array pointer
Description
Returns the array value in the previous place that's pointed to by the internal array pointer, or FALSE if there are no more elements.
Tämä funktio voi palauttaa Boolean-arvon FALSE, mutta voi myös palauttaa ei-Boolean-arvon joka evaluoituu arvoksi FALSE, kuten 0 tai "". Lisätietoja Boolean-arvot kappaleesta. Käytä paluuarvon testaukseen operaattoria ===.
Note: You won't be able to distinguish the beginning of an array from a boolean FALSE element. To properly traverse an array which may contain FALSE elements, see the each() function.
prev() behaves just like next(), except it rewinds the internal array pointer one place instead of advancing it.
Example#1 Example use of prev() and friends
<?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';
?>