PHP: prev function - Rewind the internal array pointer

(PHP 4, PHP 5)

prev — Rewind the internal array pointer

Description

mixed prev ( array &$array )

Rewind the internal array pointer.

prev() behaves just like next(), except it rewinds the internal array pointer one place instead of advancing it.

Parameters

array: The input array.

Return Values

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.

Examples

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';
?>

Notes

Warning

This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE, such as 0 or "". Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

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

Description

Parameters

Return Values

Examples

Notes

See Also