PHP array slicing extract elements from end

PHP array slicing can extract the last element of the array. The specific method is as follows: Define the array to be sliced. Use the array_slice() function and specify a negative index -n, where n is the number of elements to extract. Negative indexes count from the end of the array. This function will return an array containing the last element.

PHP Array slicing: Extract elements from the end

Array slicing is a powerful feature in PHP that allows developers to extract elements from Extract specific elements from an array. This tutorial will demonstrate how to use slicing to extract elements from the end of an array.

Syntax

The syntax for extracting the last element of an array is as follows:

array_slice($array, -n);

Among them:

• $array is the array to be sliced.
• -n is a negative number indicating the number of elements to extract from the end of the array.

Practical case

Consider the following array:

$colors = ['红色', '橙色', '黄色', '绿色', '蓝色', '靛蓝', '紫色'];

Extract the last two elements of the array

To extract the last two elements from the end of the array, you can use the following code:

$last_two_colors = array_slice($colors, -2);

$last_two_colors The variable will now contain an array containing 'blue' and 'indigo' elements.

Extract the last three elements of the array

To extract the last three elements from the end of the array, you can use the following code:

$last_three_colors = array_slice($colors, -3);

$ The last_three_colors variable will now contain an array containing 'green', 'blue' and 'indigo' elements.

Note:

• If the supplied negative number is greater than the length of the array, an empty array will be returned.
• Negative indexes count from the end of the array.

By using array slicing, developers can easily extract elements from the end of the array, which is very useful in various scenarios.

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