Append JSON to array in file using PHP

Question

I am very much a JS person so some help with PHP would be appreciated :]

I have some data - JSON in the body of a POST request - which targets a PHP file. The php file needs to add each JSON object that comes in to an existing JSON array in a separate file.json file in the same folder. I have this currently:

<?php

$jsonString = file_get_contents("php://input");

$file = file_get_contents("testFile.json");
$fileData = json_decode($file);
$fileData[] = $jsonString;

$dataAsJson = json_encode($fileData);

file_put_contents($file, $dataAsJson);
echo '{ "success": true }';
?>

But started with this, which adds new JSON to the file but not in an array or with commas to separate each object:

<?php

$jsonString = file_get_contents("php://input");

$file = "testFile.json";

file_put_contents($file, $jsonString, FILE_APPEND);
echo '{ "success": true }';
?>

You have to decode $jsonString too before pushing it into $fileData array: $fileData[] = json_decode($jsonString); — hindmost
– hindmost, Commented Jul 25, 2014 at 16:38

AbraCadaver · Accepted Answer · 2014-07-25 17:21:02Z

1

Decode the posted JSON:

$fileData[] = json_decode($jsonString);

answered Jul 25, 2014 at 17:21

AbraCadaver

79.2k7 gold badges75 silver badges91 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

typeofgraphic · Accepted Answer · 2014-07-26 16:51:04Z

0

Thanks to both answers, here is the final code to give full clarity to anyone who comes to this question.

There were two problems: the $file variable had to be just the file reference and not the 'file_get_contents' function, this was moved to create a more complete $fileData variable - to pull and decode the file.json. The other fix was adding json_decode as given by @hindmost and @AbraCadaver -thanks.

<?php

$jsonString = file_get_contents("php://input");

$file = "testFile.json";
$fileData = json_decode(file_get_contents($file));
$fileData[] = json_decode($jsonString);

$dataAsJson = json_encode($fileData);

file_put_contents($file, $dataAsJson);
echo '{ "success": true }';

?>

answered Jul 26, 2014 at 16:51

typeofgraphic

3224 silver badges11 bronze badges

Collectives™ on Stack Overflow

Append JSON to array in file using PHP

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related