How to find the sum of an array of numbers in PHP

In PHP, calculating the sum of an array of numbers is a very basic problem. Whether you're working on a simple shopping cart system or performing more complex numerical analysis, understanding how to calculate the sum of an array is essential.

This article will show you how to calculate the sum of an array of numbers using built-in functions and algorithms in PHP. Whether you are a beginner or an experienced PHP developer, by studying this article, you can master this knowledge point and quickly apply it to actual development.

1. Use the array_sum function

In PHP, the array_sum function can be used to calculate the sum of an array of numbers. This function adds all the elements in the array and returns the sum.

The following is a sample code that uses the array_sum function to calculate the sum of a numeric array:

$numbers = array(1, 2, 3, 4, 5);
$sum = array_sum($numbers);
echo "数字数组的总和为：$sum";

The above code will output: The sum of the numeric array is: 15

2. Use foreach loop calculation Sum

If you don’t want to use the built-in function, you can use a foreach loop to loop through the array and add each element to calculate the sum.

The following is a sample code that uses foreach loop to calculate the sum of a digital array:

$numbers = array(1, 2, 3, 4, 5);
$sum = 0;
foreach($numbers as $number){
    $sum += $number;
}
echo "数字数组的总和为：$sum";

The above code will output: The sum of the digital array is: 15

3. Use for loop to calculate Sum

In addition to using a foreach loop, you can also use a for loop to traverse the array and add each element to calculate the sum. When compared to a foreach loop, a for loop may be more efficient when calculating the sum of large arrays.

The following is an example code that uses a for loop to calculate the sum of an array of numbers:

$numbers = array(1, 2, 3, 4, 5);
$sum = 0;
$count = count($numbers);
for($i = 0; $i < $count; $i++){
    $sum += $numbers[$i];
}
echo "数字数组的总和为：$sum";

The above code will output: The sum of the array of numbers is: 15

Summary

Calculating the sum of an array of numbers is a basic skill in PHP, and it is also a skill often used in actual development. In this article we covered three ways to calculate the sum of an array of numbers, including using the built-in function array_sum, using a foreach loop, and using a for loop. Whether you are a beginner or an experienced developer, you can easily master these skills by studying this article and apply them flexibly in actual development.

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