How to find the sum of array values ​​in php

php method to find the sum of array values: 1. Use a loop to traverse the array; 2. Use the `array_sum()` function; 3. Use a recursive function to solve the sum of multi-dimensional arrays. .

The operating environment of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

PHP is a widely used server-side scripting language that is used to develop dynamic web applications and websites. Array is a very common and practical data type in PHP, which can be used to save multiple values. This article will explore how to find the sum of values ​​in a PHP array.

In PHP, there are many ways to find the sum of the values ​​in an array. Here are some common methods.

Method 1: Use a loop to traverse the array

First, you can use a loop to traverse each element of the array and accumulate it into a variable. The following is a sample code:

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

In the above code, we define an array `$array` containing five integers, and initialize a variable `$sum` to 0. Then use `foreach` to loop through the array, accumulating each element into `$sum`. Finally, use the `echo` function to output the accumulated results.

Method 2: Use the `array_sum()` function

PHP provides a built-in function `array_sum()` for calculating the sum of all values ​​in an array. The following is a code example using the `array_sum()` function:

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

In the above code, we pass the array as a parameter to the `array_sum()` function and assign the returned result to the variable `$sum `. Finally, use the `echo` function to output the accumulated results.

Method 3: Use a recursive function to find the sum of a multidimensional array

If the array is a multidimensional array, you can use a recursive function to calculate the sum of all values. Here is a sample code:

function recursiveArraySum($array) {
$sum = 0;
foreach($array as $value) {
if (is_array($value)) {
$sum += recursiveArraySum($value);
} else {
$sum += $value;
}
}
return $sum;
}
$array = array(array(1, 2), array(3, 4), 5);
$sum = recursiveArraySum($array);
echo "多维数组的总和为： " . $sum;

In the above code, we have defined a recursive function called `recursiveArraySum()` to calculate the sum of all values ​​in a multi-dimensional array. The function first initializes a variable `$sum` to 0. Then use `foreach` to loop through each element in the array, and if the element is an array, call the `recursiveArraySum()` function recursively; otherwise, accumulate the elements into `$sum`. Finally, the accumulated results are returned.

With the above method, we can solve the sum of the values ​​in the PHP array, whether it is a one-dimensional array or a multi-dimensional array. These methods are simple, efficient and flexible. You can choose the appropriate method to solve the sum of array values ​​according to actual needs.

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