Method for summing json arrays in php: 1. Create a PHP sample file; 2. Define the variable $jsonArrayStr to store the provided JSON array and change it to a string type; 3. Use the "json_decode()" function Decode it into a PHP array for processing; 4. Use the array_reduce() function to iterate the calculated value and return the total result; 5. Echo output and print the result.
Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.
The method for summing json arrays in PHP is:
Use PHP's built-in json_decode() function to decode it. Then use the array_reduce() function to sum the arrays.
The sample code is as follows:
<?php // Your JSON array as a string $jsonArrayStr = '[{"value": 10}, {"value": 20}, {"value": 30}]'; // Decode the JSON array into a PHP array $jsonArray = json_decode($jsonArrayStr, true); // Use array_reduce() function to sum up all values in the array $totalSum = array_reduce($jsonArray, function($carry, $item) { return $carry + $item['value']; }); echo $totalSum; // Output: 60 ?>
In the above example, the provided JSON array is first stored as a string in the $jsonArrayStr variable. Then use the json_decode() function to decode it into a PHP array for subsequent processing.
Next, we use the array_reduce() function, which accepts two parameters: the array to be processed and a callback function. The callback function uses the $carry parameter to store the value calculated in the previous iteration, and adds it to the current item's $item['value'] on each iteration, and finally returns the sum result.
Then, just output the result 60 to the screen.
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