php json_encode() automatically added slashes before slashes

Question

I am storing my data in the form of json to the database. User can input with quotes, so i am manually adding slashes before the quotes. So my data becomes like this

array:8 [▼
  "buttonText" => "Large Button"
  "campName" => "Large\'s Button Test"
  "buttonSize" => "1"
]

But when i am converting it into json, the json_encode() function automatically added one more slash before my slash as

"{"buttonText":"Large Button","campName":"Large\\'s Button Test","buttonSize":"1"}"

Why the extra slash will be added, is there any option to prevent that

please provide more code. what you are experiencing usually happens due to implementing the json encode functions twice — Ben Yitzhaki, Jun 27 '17 at 07:26
You can take a look at : [Why is json_encode adding backslashes?](https://stackoverflow.com/questions/10314715/why-is-json-encode-adding-backslashes) — Ravi Sachaniya, Jun 27 '17 at 07:27
I can't think of any scenario where you need to add slashes manually. I have the impression that you're trying to prevent SQL injection but you're instead corrupting data. — Álvaro González, Jun 27 '17 at 07:28
If you want to encode a value with a backslash, the correct JSON encoding for that is a doubled backslash. **Why are you adding backslashes to your data in the first place?!** — deceze, Jun 27 '17 at 07:29
@ravisachaniya — That's about forward slashes, not backslashes. — Quentin, Jun 27 '17 at 07:30
If double quoted problem in query when storing the data into database so you have to use the mysql_real_escape_string($data) or mysqli_real_escape($con,$data) function in php — Bhavin Thummar, Jun 27 '17 at 07:47
*"Why the extra slash will be added, is there any option to prevent that?"* -- Do you want to prevent what? To prevent [`json_encode()`](http://php.net/manual/en/function.json-encode.php) create a valid JSON? Go ahead and remove the backslashes as you please. You will come back tomorrow with another question complaining that [`json_decode()`](http://php.net/manual/en/function.json-decode.php) cannot decode your malformed JSONs. — axiac, Jun 27 '17 at 07:57
@axiac actually i am getting an array of objects when fetching the data in db, so i am striping the slashes for each object, but that extra slash is creating problem, i have to stripslashes two times — RAUSHAN KUMAR, Jun 27 '17 at 09:54
@RAUSHANKUMAR Thanks for approving my answer and if you still need to clean all slashes, here is also one my old solution what I post before 3 years ago: http://php.net/manual/en/function.stripslashes.php#114533 — Ivijan Stefan Stipić, Jun 27 '17 at 12:06

Ivijan Stefan Stipić · Accepted Answer · 2017-06-27T07:32:43.193

Why you do like this? Is totaly bad thing adding slashes manualy.

You can just generate JSON using arrays like:

$arr=array();

$arr['buttonText']="Large Button";
$arr['campName']="Large's Button Test";
$arr['buttonSize']=1;

echo json_encode($arr);

Just use json_encode() to store values and json_decode() to get values.

Here is diferent aproach:

$arr=array(
    'buttonText'=>"Large Button",
    'campName'=>"Large's Button Test",
    'buttonSize'=>1,
);

echo json_encode($arr);

JSON ENCODE - Manual

JSON DECODE - Manual

json_encode() adding slashes automaticaly and json_decode() remove it. You don't need to think about that. Just don't worry and be happy.

score 1 · Answer 2 · edited Sep 21 '17 at 18:48

1

Extra slashes are added because that's what json_encode will do. See this documentation

In your case if you're encoding data to store in database, you don't need to manually add slashed. json_encode will take care of all escaping.

edited Sep 21 '17 at 18:48

miken32

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answered Jun 27 '17 at 07:57

shyammakwana.me

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php json_encode() automatically added slashes before slashes

2 Answers2