PHP gets and deletes the first and last elements of an array

How do I get and delete the first or last element of an array in PHP? In fact, both of these processes can be done through PHP's own functions Array_pop and Array_shift, the following is a detailed description of how to operate.
(1) Use Array_pop to delete the last element of an array, for example:

$arr=array(' A ', ' B ', ' C '); $result=array_pop($arr); Print_r ($result); Print_r ($arr);

The result will be:

C Array (' A ', ' B ')

(2) Use Array_shift to delete the first element of an array, for example:

$arr=array(' A ', ' B ', ' C '); $result=array_shift($arr); Print_r ($result); Print_r ($arr);

The result will be:

a Array (' B ', ' C ')

In fact, the first element of the delete array can also use the Array_splice function, namely:

$arr=array_splice($arr// Delete the first element of the array, note that the new array is returned when it is deleted

Here's a simple explanation for Array_pop and Array_shift:

Array_pop () pops up and returns the last cell of the array, minus one of the array's length. If array is empty (or not an array), NULL is returned.
Array_shift () Moves the first cell of the array out and returns as a result, reducing the length of the array and moving all other cells forward one bit. All numeric key names are changed from zero to start, and the text key name is unchanged. If the array is empty (or not an array), NULL is returned.

Ext.: https://www.cnblogs.com/zqifa/p/php-3.html

PHP gets and deletes the first and last elements of an array