How to calculate the sum of arrays in PHP

In PHP, we can use the built-in function array_sum() to calculate the sum of an array. The array_sum() function accepts an array as a parameter and returns the sum of all elements in the array. The following is a sample code that uses the array_sum() function to calculate the sum of an array:

<?php
$numbers = array(1, 2, 3, 4, 5);
$sum = array_sum($numbers);
echo "数组的总和为：$sum";
?>

The output result is: The sum of the array is: 15

In addition to using the array_sum() function, we can also use a loop to iterate through the array and add the value of each element. The following is a sample code that uses a loop to calculate the sum of an array:

<?php
$numbers = array(1, 2, 3, 4, 5);
$sum = 0; // 初始化总和为0
foreach ($numbers as $number) {
  $sum += $number;
}
echo "数组的总和为：$sum";
?>

The output result is: the sum of the array is: 15

It should be noted that when there are non-numeric elements in the array, The array_sum() function returns 0. Therefore, when using the array_sum() function to calculate the sum of an array, you need to first check whether the type of the array elements is correct and exclude non-numeric elements. The following is a simple example of checking the type of array elements:

<?php
$numbers = array(1, 2, 3, '4', 'five');
$sum = 0;
foreach ($numbers as $number) {
  if (is_numeric($number)) { // 检查元素是否为数字类型
    $sum += $number;
  }
}
echo "数组的总和为：$sum";
?>

The output result is: the sum of the array is: 6

In actual development, we often need to process the data of the array and calculate the Summing is one of the common requirements. PHP provides many convenient tools and functions to make processing arrays simple and fast. By reading this article, you have learned how to calculate the sum of an array using the array_sum() function.

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