PHP returns the sum of all values ​​in an array

php editor Xinyi today introduces you to a practical PHP skill-how to calculate the sum of all values ​​in the returned array. In development, it is often necessary to perform a sum operation on the values ​​in an array. Although this operation is simple, it requires certain skills. Through the introduction of this article, you will learn how to use the array_sum() function in PHP to quickly and efficiently calculate the sum of all elements in an array, making your development work more convenient and efficient. Next, let’s take a look at the specific implementation method!

php Returns the sum of all values ​​in the array

There are several ways in PHP to calculate the sum of all values ​​in an array. Here are some of the most common techniques:

1. array_sum() function

array_sum() The function can be used to calculate the sum of all values ​​in an array. It accepts an array as argument and returns an integer result.

<?php
$numbers = [1, 2, 3, 4, 5];
$sum = array_sum($numbers);
echo $sum; // Output: 15
?>

2. Looping and accumulation

You can use loops and accumulation to manually calculate the sum of all values ​​in an array. The following code uses foreach to loop through each element in the array and add it to the sum:

<?php
$numbers = [1, 2, 3, 4, 5];
$sum = 0;
foreach ($numbers as $number) {
$sum = $number;
}
echo $sum; // Output: 15
?>

3. reduce() function (PHP 7 and above)

The reduce() function was introduced in PHP 7 and above, which provides a concise and powerful way to calculate the sum of all values ​​in an array. reduce() The function accepts two parameters: a callback function and an initial value (optional). The callback function is applied to each element in the array, and the accumulator (initial value) stores the result of the calculation.

<?php
$numbers = [1, 2, 3, 4, 5];
$sum = array_reduce($numbers, function($carry, $item) {
return $carry $item;
});
echo $sum; // Output: 15
?>

4. spl_array_sum() function

SPL (Standard PHP Library) provides the spl_array_sum() function, which is similar to the array_sum() function, but it accepts a SplFixedArray as argument. SplFixedArray is a higher performance array type, often used to store large amounts of data.

<?php
$numbers = new SplFixedArray([1, 2, 3, 4, 5]);
$sum = spl_array_sum($numbers);
echo $sum; // Output: 15
?>

Specific data type

For specific data types, PHP also provides specialized functions to calculate their sum:

• array_sum() for integer array
• array_sum() For floating point array
• array_sum() Used for strings Arrays (add string lengths)

Best Practices

• Choose the technique that best suits the data type and array size used.
• Use the array_sum() function for general-purpose summing operations.
• For large arrays, consider using the reduce() function or the spl_array_sum() function for better performance.
• Make sure that the array contains only valid numbers, otherwise the summation result may be inaccurate.

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