An array is a collection of elements stored together. Every element in an array belong to a similar data type. The elements in the array are recognized by their index values. The elements can be subjected to a variety of operations, including reversal. There are various ways to reverse the elements of an array :
Approach 1: Using for Loop, a decrement for loop can be initiated in order to access the elements in the reverse order. The index begins at the length of the array – 1 until it reaches the beginning of the array. During each iteration, the inbuilt array_push method is called, which is used to push the elements to the newly declared array maintained for storing reverse contents.
Syntax:
array_push($array, $element)
PHP
<?php // Declaring an array $arr = array(1, 2, 3, 4, 5); echo("Original Array : "); print_r($arr); // Declaring an array to store reverse $arr_rev = array(); for($i = sizeof($arr) - 1; $i >= 0; $i--) { array_push($arr_rev,$arr[$i]); } echo("Modified Array : "); print_r($arr_rev); ?> |
Original Array : Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
)
Modified Array : Array
(
[0] => 5
[1] => 4
[2] => 3
[3] => 2
[4] => 1
)
Approach 2 : Using array_reverse() Method, the array_reverse() function can be used to reverse the contents of the specified array. The output is also returned in the form of an array.
Syntax:
array_reverse($array)
PHP
<?php // Declaring an array $arr = array(1, 2, 3, 4, 5); echo("Original Array : "); print_r($arr); // Reversing array $arr_rev = array_reverse($arr); echo("Modified Array : "); print_r($arr_rev); ?> |
Original Array : Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
)
Modified Array : Array
(
[0] => 5
[1] => 4
[2] => 3
[3] => 2
[4] => 1
)
