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Last updated: Tue, 19 Sep 2006


(PHP 3, PHP 4, PHP 5)

prev -- Rewind the internal array pointer


mixed prev ( array &array )

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.


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() 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

$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';

See also current(), end(), next(), reset(), and each().

Last updated: Tue, 19 Sep 2006