How to find the sum of an array in php

In the PHP language, array (Array) is a very commonly used data type. It is often necessary to add, subtract, multiply, divide and other operations on the elements in the array. Finding the sum of all elements in an array is also a common operation. This article will introduce how to use PHP language to find the sum of all elements in an array.

1. Use a for loop to calculate the sum of array elements

The most common method is to use a for loop to iterate over the array and use an accumulator to add up each element until the until all elements are added. This can be achieved through the following code:

$nums = array(1, 2, 3, 4, 5);
$sum = 0;
for($i=0; $i<count($nums); $i++){
    $sum += $nums[$i];
}
echo "数组元素的总和为：".$sum;

Execute the above code, the output result is:

数组元素的总和为：15

2. Use the array_sum function to calculate the sum of array elements

PHP provides a special Function array_sum(), which can directly add all elements in the array. This can be achieved through the following code:

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

Execute the above code, the output result is:

数组元素的总和为：15

3. Use the array_reduce function to calculate the sum of array elements

Another useful function in PHP The function is array_reduce(), which is similar to the array_sum() function, but it is more flexible. This can be achieved through the following code:

$nums = array(1, 2, 3, 4, 5);
$sum = array_reduce($nums, function($carry, $num){
    $carry += $num;
    return $carry;
});
echo "数组元素的总和为：".$sum;

Execute the above code, the output result is:

数组元素的总和为：15

4. Use foreach loop to calculate the sum of array elements

Another way to traverse array elements The method is to use a foreach loop, which is usually used to iterate through each element in the array and perform some operations. The following is the code that uses a foreach loop to calculate the sum of an array:

$nums = array(1, 2, 3, 4, 5);
$sum = 0;
foreach($nums as $num){
    $sum += $num;
}
echo "数组元素的总和为：".$sum;

Execute the above code, the output result is:

数组元素的总和为：15

The above are several methods for calculating the sum of array elements in PHP language, no matter which method is used Either way, this function can be easily achieved. In practical applications, you can choose the most suitable method according to your own habits and needs.

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