How to merge two json file with PHP

We can merge two json files which has same json structure. In our example we will create two json file and we will merge those with the help of PHP code. So in current folder lets create our sample json files first. We will keep json file names as json_1.json and json_2.json. Both json files' content mentioned below json_1.json will contain below json

[{
        "name":"John",
        "class":"XXI",
        "address":"USA"
}]

[
        {
                "name":"Carloss",
                "class":"XX",
                "address":"CA"
        },
        {
                "name":"Mark",
                "class":"VV",
                "address":"UK"
        }
]

<?php
$finalArr=$jsonArr1=$jsonArr2=[];

$json_obj1 = file_get_contents('json_1.json');
$jsonArr1 = json_decode($json_obj1, true);

$json_obj2 = file_get_contents('json_2.json');
$jsonArr2 = json_decode($json_obj2, true);

$finalArr=$jsonArr1;
$finalArr=array_merge_recursive($finalArr, $jsonArr2);

print_r($finalArr);
// file_put_contents('final_file.json', json_encode($finalArr));   // enable it if want to write output in json file
?>