PHP Tutorial - PHP reset() Function
Definition
An array cursor is a pointer pointing to the next array element.
The reset() function rewinds its parameter's cursor to the first element,
then return the value of that element.
Syntax
PHP reset() Function has the following syntax.
reset(array)Parameter
| Parameter | Is Required | Description |
|---|---|---|
| array | Required. | Specifies the array to use |
Return
If cannot return a value, it will return false.
Related methods
| Method | Description |
|---|---|
| current() | returns the value of the current element in an array |
| end() | moves the pointer to, and outputs, the last element in the array |
| next() | moves the pointer to, and outputs, the next element in the array |
| prev() | moves the pointer to, and outputs, the previous element in the array |
| each() | returns the current element key and value, and moves the pointer forward |
Example 1
Output the value of the current and next element in an array, then reset the array's internal pointer to the first element in the array:
<?php
$people = array("A", "B", "C", "D");
echo current($people) . "\n";
echo next($people) . "\n";
echo reset($people);
?>
The code above generates the following result.
Example 2
A demonstration of all related methods:
<?php/*www. j a v a 2s .com*/
$people = array("A", "B", "C", "D");
echo current($people) . "\n"; // The current element is A
echo next($people) . "\n"; // The next element of A is B
echo current($people) . "\n"; // Now the current element is B
echo prev($people) . "\n"; // The previous element of B is A
echo end($people) . "\n"; // The last element is D
echo prev($people) . "\n"; // The previous element of D is C
echo current($people) . "\n"; // Now the current element is C
echo reset($people) . "\n"; // Moves the internal pointer to the first element of the array, which is A
echo next($people) . "\n"; // The next element of A is B
print_r (each($people)); // Returns the key and value of the current element (now B), and moves the internal pointer forward
?>
The code above generates the following result.
