How to remove the last value from an array in php

When using PHP to operate an array, we sometimes need to delete elements in the array. One of the situations is when we need to delete the last element in the array. This article will explain how to delete the last value in an array in PHP.

There are many ways to delete the last value in an array in PHP. The following are two commonly used methods:

Method 1: Use array_pop function

array_pop function Used to remove the last element from an array and return the value of that element. We can use this function to delete the last value in the array.

Sample code:

$arr = array(1, 2, 3, 4);
$last = array_pop($arr);
print_r($arr);

Output result:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)

In the above example, we define an array $arr, which contains 4 elements. We then use the array_pop function to remove the last element of the array and assign its value to the $last variable. Finally, we use the print_r function to output the modified array.

Method 2: Use the unset function

In addition to using the array_pop function, we can also use the unset function to delete the last element in the array. The unset function is used to destroy the specified variable. If the variable is an element in the array, the element will be deleted.

Sample code:

$arr = array(1, 2, 3, 4);
unset($arr[count($arr) - 1]);
print_r($arr);

Output result:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)

In the above example, we first use the count function to get the length of the array, and then use the unset function to delete the length of the array The last element. Finally, we use the print_r function to output the modified array.

It should be noted that when using the unset function to delete an element in the array, the subscript of the element will no longer exist. For example, if we delete the 2nd element in the array, the 3rd element in the array will become the 2nd element and its subscript value will change accordingly.

Summary

There are two ways to delete the last value in an array in PHP: using the array_pop function and using the unset function. When using the array_pop function, the function will return the deleted element value; while using the unset function, this value will not be returned. We can choose the appropriate method according to the specific situation.

The above is the detailed content of How to remove the last value from an array in php. For more information, please follow other related articles on the PHP Chinese website!