How to use function to find the sum of arrays in Php

PHP is a powerful programming language that is widely used in web application development, dynamic web page production and other fields. In PHP, array is a very important data type, which can be used to store a series of related data.

In the actual programming process, we often need to calculate the elements in the array, such as finding the sum of the array. PHP provides a wealth of array functions, including functions for finding the sum of arrays.

Let’s introduce how to use PHP functions to find the sum of arrays.

First, we need to define an array. We can create an array containing multiple elements in the following way:

$array = array(1, 2, 3, 4, 5);

This is an array containing 5 elements. We can create it in the following way. Find the sum of its elements:

$sum = array_sum($array);

Among them, the array_sum function is used to find the sum of all elements in the array, and its return value is the calculated sum. The above code will accumulate all elements in the array and save the result in the variable $sum.

If you want to pass in a multi-dimensional array in the function and sum the array of a certain dimension, you can also use the array_column function to extract a column in the array and Sum them up.

The following is a sample code:

$array = array(
    array('id' => 1, 'name' => '张三', 'score' => 90),
    array('id' => 2, 'name' => '李四', 'score' => 80),
    array('id' => 3, 'name' => '王五', 'score' => 70)
);

$sum = array_sum(array_column($array, 'score'));

In this example, we define a two-dimensional array containing 3 elements, each element is a key-value pair containing 3 dimensional array. We extract the data column "score" and sum it using the array_sum function, and finally get the sum of all scores.

To summarize, it is a very simple thing to use the PHP function to find the sum of an array. Whether it is a one-dimensional array or a multi-dimensional array, you can use PHP functions to quickly calculate their sum, which will help us improve programming efficiency and reduce the possibility of errors.

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