Error creating a fopen file

Question

When trying to create a file in JSON format with fopen I am returned a permission error with the following message:

Warning: fopen(/json/9.json): failed to open stream: No such file or directory in C: xampp htdocs apil Controllers Classex.php on line 120

As I use Windows OS I have also already given permission in the folder I have already left pre-created, however the problem still persists.

Permission I gave everyone about the JSON file by right-clicking on the file->Properties->Share:

The code I’m using to create the file and then write the data to it follows:

 protected function filejson($product_id, $account_id) {
    $file = array($account_id);

    $json = fopen("/json/" . $product_id . ".json", "w");
    fwrite($json, json_encode($file));
    fclose($json);
}

And make the call of the method in another method that is in the same class as follows:

 Classex::filejson($product_id, $this->getAccount_id());

It is worth mentioning that both vestments $product_id and $account_id have the correct content or are not null.

I am using XAMPP in Windows 10.

Answer 1

First, and important:

Sharing is not folder permission. Sharing is permission to access another PC folder (and modify its source including).

Folder permission is by clicking Properties > Security

According to:

There’s an extra bar at the beginning of the road, fopen is in relation to the file system, and not the site root:

$json = fopen("/json/" . $product_id . ".json", "w");
//             ^

If you want path relative to the executed file, you can use it like this:

$json = fopen("json/" . $product_id . ".json", "w");

Or so:

$json = fopen("./json/" . $product_id . ".json", "w");

Even so, you need to make sure that you are running the script in the correct folder, and that nothing previous in this code has changed the working directory.

An alternative would be to use some environment variable to produce the full path:

$root = $_SERVER['DOCUMENT_ROOT']; // Equivale ao "/" do site, dependendo 
                                   // do jeito que foi configurado o servidor
                                   // No seu caso vai retornar algo como: C:/xampp/htdocs

$json = fopen("$root/json/" . $product_id . ".json", "w");