PHP prev()Functions
Complete PHP Array Reference Manual
Examples
Output the values of the current, next, and previous elements in the array:
<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland");
echo current($people) . "<br>";
echo next($people) . "<br>";
echo prev($people);
?>
$people = array("Peter", "Joe", "Glenn", "Cleveland");
echo current($people) . "<br>";
echo next($people) . "<br>";
echo prev($people);
?>
Run Example »
Definition and Usage
The prev() function points the internal pointer to the previous element in the array and outputs it.
Related methods:
- next()- Points the internal pointer to the next element in the array and outputs it.
- current()- Returns the value of the current element in the array.
- end()- Points the internal pointer to the last element in the array and outputs it.
- reset()- Points the internal pointer to the first element in the array and outputs it.
- each()- Returns the key and value of the current element, and moves the internal pointer forward.
Syntax
prev(array)
| Parameters | Description |
|---|---|
| array | Required. Specifies the array to use. |
Technical Details
| Return value: | Returns the value of the previous element in the array on success, or FALSE if there are no more array elements. |
|---|---|
| PHP Version: | 4+ |
More Examples
Example 1
Demonstration of all related methods:
<?php
$people = array("Peter", "Joe", "Glenn", "Cleveland");
echo current($people) . "<br>"; // The current element is Peter
echo next($people) . "<br>"; // The next element of Peter is Joe
echo current($people) . "<br>"; // Now the current element is Joe
echo prev($people) . "<br>"; // The previous element of Joe is Peter
echo end($people) . "<br>"; // The last element is Cleveland
echo prev($people) . "<br>"; // The previous element of Cleveland is Glenn
echo current($people) . "<br>"; // Now the current element is Glenn
echo reset($people) . "<br>"; // Moves the internal pointer to the first element of the array, which is Peter
echo next($people) . "<br>"; // The next element of Peter is Joe
print_r (each($people)); // Returns the key and value of the current element (now Joe), and moves the internal pointer forward
?>
$people = array("Peter", "Joe", "Glenn", "Cleveland");
echo current($people) . "<br>"; // The current element is Peter
echo next($people) . "<br>"; // The next element of Peter is Joe
echo current($people) . "<br>"; // Now the current element is Joe
echo prev($people) . "<br>"; // The previous element of Joe is Peter
echo end($people) . "<br>"; // The last element is Cleveland
echo prev($people) . "<br>"; // The previous element of Cleveland is Glenn
echo current($people) . "<br>"; // Now the current element is Glenn
echo reset($people) . "<br>"; // Moves the internal pointer to the first element of the array, which is Peter
echo next($people) . "<br>"; // The next element of Peter is Joe
print_r (each($people)); // Returns the key and value of the current element (now Joe), and moves the internal pointer forward
?>
Run Example »
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