Home > Article > Backend Development > What is the summation function of a certain field in a php array?
In PHP, arrays are a very common data structure. Developers can easily operate on array data, such as filtering, sorting, merging, etc. Summing a field in an array is also common in development. needs.
The following is a simple method that can quickly implement the sum operation of a field in an array in PHP.
$testArray = array( array('name' => 'apple', 'value' => 10), array('name' => 'orange', 'value' => 20), array('name' => 'banana', 'value' => 30), array('name' => 'watermelon', 'value' => 40), array('name' => 'melon', 'value' => 50) );
$sum = array_sum(array_column($testArray, 'value'));
In the above code, we first use the array_column() function to extract the value of the 'value' field from the $testArray array, and then use the array_sum() function to sum it, and finally get The result is $sum.
echo '求和结果为:' . $sum . '<br>'; echo '原始数组内容为:<br>'; print_r($testArray);
The complete code is as follows:
$testArray = array( array('name' => 'apple', 'value' => 10), array('name' => 'orange', 'value' => 20), array('name' => 'banana', 'value' => 30), array('name' => 'watermelon', 'value' => 40), array('name' => 'melon', 'value' => 50) ); $sum = array_sum(array_column($testArray, 'value')); echo '求和结果为:' . $sum . '<br>'; echo '原始数组内容为:<br>'; print_r($testArray);
The execution result is:
The summation result is: 150
The original array content is:
Array
(
[0] => Array ( [name] => apple [value] => 10 ) [1] => Array ( [name] => orange [value] => 20 ) [2] => Array ( [name] => banana [value] => 30 ) [3] => Array ( [name] => watermelon [value] => 40 ) [4] => Array ( [name] => melon [value] => 50 )
)
As you can see, we have successfully summed the values of the 'value' field in the array, and the result is 150. This method is simple and easy to understand, and is suitable for situations where the amount of data is small. For large-scale data, it may be necessary to use other algorithms with better performance for summation operations.
The above is the detailed content of What is the summation function of a certain field in a php array?. For more information, please follow other related articles on the PHP Chinese website!