How to Merge Multiple JSON Objects in PHP?

Merging Multiple JSON Objects in PHP

In PHP, merging two or more JSON objects can be achieved using the array_merge() function. This function takes an array of arrays as input and combines their values into a single array.

To merge two JSON objects, we first need to convert them into PHP arrays using the json_decode() function. Here's an example:

<?php

$json1 = '[{"COLUMN_NAME":"ORDER_NO","COLUMN_TITLE":"Order Number"},{"COLUMN_NAME":"CUSTOMER_NO","COLUMN_TITLE":"Customer Number"}]';
$json2 = '[{"COLUMN_NAME":"ORDER_NO","DEFAULT_VALUE":"1521"},{"COLUMN_NAME":"CUSTOMER_NO","DEFAULT_VALUEE":"C1435"}]';

$array1 = json_decode($json1, true);
$array2 = json_decode($json2, true);

// Merge the two arrays
$merged_array = array_merge($array1, $array2);

// Encode the merged array back into JSON
$merged_json = json_encode($merged_array);

echo $merged_json;

The above code will produce the following JSON output:

[{"COLUMN_NAME":"ORDER_NO","COLUMN_TITLE":"Order Number","DEFAULT_VALUE":"1521"},{"COLUMN_NAME":"CUSTOMER_NO","COLUMN_TITLE":"Customer Number","DEFAULT_VALUEE":"C1435"}]

Note that the output JSON has a slightly different structure compared to the desired one. This is because the array_merge() function only combines the array values, and it does not retain the original keys. To preserve the original keys, we can use the array_merge_recursive() function instead.

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