How to append Json file inside php using Php

Question

I have an json file embedded inside php file, I would like to add new infromation from form inside json file...

My form is

<form action="process.php" method="POST">
	First name:<br>
	<input type="text" name="firstName">
	<br><br/>
	Last name:<br>
	<input type="text" name="lastName">
	<br><br>
	  
	Email:<br>
	<input type="text" name="email">
	<br><br>
	  
	Mobile:<br>
	<input type="text" name="mobile">
	<br><br>
	  
	  
	<input type="submit" value="Submit">
</form>

and the php file is

<?php
   
   $myFile = "data.php";
   $arr_data = array(); // create empty array

  try
  {
	   //Get form data
	   $formdata = array(
	      'firstName'=> $_POST['firstName'],
	      'lastName'=> $_POST['lastName'],
	      'email'=>$_POST['email'],
	      'mobile'=> $_POST['mobile']
	   );

	   //Get data from existing json file
	   $jsondata = file_get_contents($myFile);

	   // converts json data into array
	   $arr_data = json_decode($jsondata, true);

	   // Push user data to array
	   array_push($arr_data,$formdata);

       //Convert updated array to JSON
	   $jsondata = json_encode($arr_data, JSON_PRETTY_PRINT);
	   
	   //write json data into data.json file
	   if(file_put_contents($myFile, $jsondata)) {
	        echo 'Data successfully saved';
	    }
	   else 
	        echo "error";

   }
   catch (Exception $e) {
            echo 'Caught exception: ',  $e->getMessage(), "\n";
   }

?>

When I click the submit button, The new data is being added as follow

{
    "heroes": [
        {
            "firstName": "Vijay",
            "lastName": "reddy",
            "email": "[email protected]",
            "mobile": ""
        },
        {
            "firstName": "Paki",
            "lastName": "Webb",
            "email": "[email protected]",
            "mobile": "66464646464"
        },
        {
            "firstName": "sagar",
            "lastName": "rawal",
            "email": "[email protected]",
            "mobile": "98989898"
        }
    ],
    "0": {
        "firstName": "sagar",
        "lastName": "rawal",
        "email": "[email protected]",
        "mobile": "98989898"
    },
    "1": {
        "firstName": "Purnima",
        "lastName": "rawal",
        "email": "[email protected]",
        "mobile": "98652845"
    }
}

But I want to have data as

{
    "heroes": [
        {
            "firstName": "Vijay",
            "lastName": "reddy",
            "email": "[email protected]",
            "mobile": ""
        },
        {
            "firstName": "Paki",
            "lastName": "Webb",
            "email": "[email protected]",
            "mobile": "66464646464"
        },
        {
            "firstName": "sagar",
            "lastName": "rawal",
            "email": "[email protected]",
            "mobile": "98989898"
        },
        {
           "firstName": "sagar",
           "lastName": "rawal",
           "email": "[email protected]",
           "mobile": "98989898"
        },
        {
           "firstName": "Purnima",
           "lastName": "rawal",
           "email": "[email protected]",
           "mobile": "98652845"
       }
   ]
}

i.e remove the index and write the new data inside json along with other data...so far I couldn't do ...so please help me...Thanks in advance.

if you want the data to live in the heroes array, then you'll need to add it to that array, not to the object that contains heroes. — Mike 'Pomax' Kamermans
– Mike 'Pomax' Kamermans, Commented Sep 28, 2018 at 16:44

zebnat · Accepted Answer · 2018-09-28 17:30:13Z

2

You just did a array_push to the entire json array, you want it inside 'heroes'

// converts json data into array
$arr_data = json_decode($jsondata, true);
$arr_data['heroes'][] = $formdata; // Will push $formdata inside 'heroes' array from json

If you prefer to use array_push then do this:

// converts json data into array
$arr_data = json_decode($jsondata, true);
array_push($arr_data['heroes'], $formdata); // Will push $formdata inside 'heroes' array from json

edited Sep 28, 2018 at 17:30

answered Sep 28, 2018 at 16:43

zebnat

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2 Comments

Blueyeti Over a year ago

but how to push the data on top?? I used array_push($arr_data['heroes'][] = $formdata); but it gives me error

zebnat Over a year ago

You either do $arr_data['heroes'][] = $formdata; or array_push($arr_data['heroes'],$formdata)

Forbs · Accepted Answer · 2018-09-28 16:42:48Z

0

Change this

 array_push($arr_data,$formdata)

to this

 array_push($arr_data['heroes'],$formdata)

answered Sep 28, 2018 at 16:42

Forbs

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2 Comments

Blueyeti Over a year ago

it throws me error " Parse error: syntax error, unexpected '$jsondata' (T_VARIABLE) in /srv/disk2/2801471/www/mscphysics.atwebpages.com/test/process.php on line 26 "

Forbs Over a year ago

That's because I didn't put the ;, did you remove it?

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