php man page for prev

PREV(3) 								 1								   PREV(3)

prev - Rewind the internal array pointer

SYNOPSIS
       mixed prev (array  &$array)

DESCRIPTION
	Rewind the internal array pointer.

       prev(3) behaves just like next(3), except it rewinds the internal array pointer one place instead of advancing it.

PARAMETERS
	      o $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(3) 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. 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(3) function.

SEE ALSO
       current(3), end(3), next(3), reset(3), each(3).

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