JSON.encode正在添加反斜杠

Question

Had to re do this as last question was marked to close as duplicate. BUT the "Duplicate" question was about json decoding not encoding and adding to a file. I have also stated in my question the things I have tried, which as it so happens was the accepted answer on the 'duplicate'.

Please do not mark as duplicate again without actually checking it is.

When I try to create a file with some generated JSON data, the result is like so:

 "{\"1\":{\"title\":\"Sidemen: The Book\",\"ISBN\":\"1473648165\"

as you can see, it has wrapped everything in "" quotes ""

It has also added in lots of: ' \ ' which I don't want.

This is what I currently have:

$json = json_encode($BookList);

and I create the file in PHP like so:

$fp = fopen($filename, 'w');
fwrite($fp, json_encode($json));
fclose($fp);

I have tried:

$json = json_encode($BookList, JSON_UNESCAPED_SLASHES);

and:

$json = json_encode($BookList, JSON_UNESCAPED_SLASHES);
$json_edited = stripslashes($json);

but nothing seems to be working.

Any ideas?

Update

Book list is generated like so:

$BookList[++$id] = [
    'title'  => (string) $item->ItemAttributes->Title,
    'ISBN'   => '' .(string) $item->ItemAttributes->ISBN
];

Answer 1

You're double-encoding your data, e.g., passing it through json_encode twice. You have

$json = json_encode($BookList, JSON_UNESCAPED_SLASHES);
// -----^^^^^^^^^^^

and also

fwrite($fp, json_encode($json));
// ---------^^^^^^^^^^^

You only want one of those.