Introduction to how to use PHP array_pop() function

The array_pop() function in PHP is used to remove the last element in the array and return the value of the element. This function can be widely used in array operations.

The following is how to use the array_pop() function:

Syntax

array_pop ( array &$array ) : mixed

Parameters

array: required. The array to operate on.

Return value

The array_pop() function returns the value of the removed element. If the array is empty, NULL is returned.

Example Demonstration

The following is a few simple examples to demonstrate the use of the array_pop() function.

1. Return the last element of the array

$ages = array(20, 30, 40, 50);  
echo array_pop($ages);  // 输出：50

2. Remove the last element of the array

$ages = array(20, 30, 40, 50);  
array_pop($ages); 
print_r($ages);  // 输出：Array([0] => 20 [1] => 30 [2] => 40)

3. Get A new array composed of the last element of the array

$ages = array(20, 30, 40, 50);  
$new_array = array(array_pop($ages)); 
print_r($new_array);  // 输出：Array([0] => 50)

Notes

1. array_pop() function performs side-effect operations on the parameters passed in, that is, it will change the original The structure of the array.
2. The array_pop() function can only operate on arrays. If other data types are passed to this function, an error will be reported.
3. When trying to use the array_pop() function, you need to ensure that the array to be operated is not an empty array, otherwise the function will return null.

Summary

The array_pop() function is a common array operation function, which can play a big role in removing the last element in the array. Proficient in using the array_pop() function can enable developers to operate arrays more efficiently.

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