Is it possible to pass JavaScript object to another PHP page and read by PHP functions?

Question

I am using PHP and I have Javascript object called "row" in one page that contain some data and I know how to pass it to another page using localStorage but I wonder can I read this JS object using PHP functions in the second page ?

score 4 · Accepted Answer · edited May 23 '17 at 12:23

4

You can store your object in cookie instead of localStorage.
Cookie can store only strings, so you should encode your object to string with javascript JSON.stringify, and then use json_decode to decode it in PHP.

See here how to set cookie with javascript.

Here's an example:

var data = {/*your data*/},
    string_data = JSON.stringify( data );

setCookie( 'my_data', string_data );

and then in PHP:

$data = json_decode( $_COOKIE[ 'my_data' ] );

edited May 23 '17 at 12:23

Community

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answered Jan 18 '16 at 18:34

Legotin

2,378
1
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error setCookie is not defined, please modify your example – zac Jan 18 '16 at 19:00
I used `document.cookie` – zac Jan 18 '16 at 19:10
`setCookie` is an abstract function to show the general idea – Legotin Jan 18 '16 at 19:33

score 1 · Answer 2 · answered Jan 18 '16 at 18:36

1

You could use:

json_decode(string $json)

See documentation in http://php.net/manual/en/function.json-decode.php This takes a JSON encoded string and converts it into a PHP variable.

answered Jan 18 '16 at 18:36

Caio Ladislau

1,257
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score 0 · Answer 3 · answered Jan 18 '16 at 18:36

What exactly are you trying to do?

PHP itself is not able to read js objects or variables, but you can pass them to php through post/get request via ajax (for example).

To pass a js object to php use json.

In js:

JSON.stringify(j);

in php:

json_decode(json);

Sudipta Kumar Maiti · Answer 4 · 2016-01-18T19:02:45.987

set localStorage or sessionStorage using javascript and retrieve values using javascript, no server code can directly access it.

Page1:

if(typeof(Storage) !== "undefined") {
     localStorage.setItem("YourKey", "Your Value");
      //replace "Your Value" with 'row' object
} else {
      console.log("No Web Storage support..");
}

if(typeof(Storage) !== "undefined") {
     sessionStorage.setItem("YourKey", "Your Value");
     //replace "Your Value" with 'row' object
 } else {
      console.log("No Web Storage support..");
 }

Page2:

 if(typeof(Storage) !== "undefined") {
      localStorage.getItem("YourKey");
 } else {
      console.log("No Web Storage support..");
 }

 if(typeof(Storage) !== "undefined") {
      sessionStorage.getItem("YourKey");
 } else {
        console.log("No Web Storage support..");
 }

stringify row object using JSON.stringify() and send the value to php either through query string or cookies or form post.

Is it possible to pass JavaScript object to another PHP page and read by PHP functions?

4 Answers4