How to remove the last element of an array using array_pop function in PHP

In PHP, array is a very commonly used data type. When we need to operate an array, sometimes we need to delete the last element in the array. At this time, we can use the array_pop function in PHP.

The array_pop function is a function in PHP used to delete the last element in an array. This function returns the deleted element, or null if the array is empty.

The following is an introduction to how to use the array_pop function to delete the last element of an array:

The first step is to define the array

Before using the array_pop function, we need to define an array. Here is an example:

$fruits = array("apple", "banana", "orange", "grape", "watermelon");

The second step, use the array_pop function to delete the last element

The method to delete the last element of the array is very simple, just use the array_pop function. The code is as follows:

$last_fruit = array_pop($fruits);

In this way, the last element in the $fruits array is deleted and assigned to the $last_fruit variable.

The third step is to check whether the array is deleted successfully

We can use the print_r function to view the contents of the array to see if the last element has been deleted. The code is as follows:

print_r($fruits);

The output result is as follows:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => grape
)

As you can see, the last element "watermelon" has been deleted.

If there are no elements in the array, using the array_pop function will return null. Therefore, after using the array_pop function, we can use an if statement to check whether the array is empty. The code is as follows:

if (count($fruits) == 0) {
   echo "数组为空";
}

This ensures that our code will not cause problems after deleting the last element.

Summary:

It is very simple to use the array_pop function to delete the last element of the array. Just define the array and use the array_pop function. After manipulating an array, remember to use the print_r function to check whether the contents of the array are as expected. In addition, if the array is empty, using the array_pop function will return null. Therefore, we need to use an if statement to determine whether the array is empty after using this function.

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