Im trying to pass a mulitidimensional Javascript array to another page on my site by:
using JSON.stringify on the array
assigning the resultant value to an input field
posting that field to the second page
using json_decode on the posted value
then var_dump to test
(echo'ing the posted variable directly just to see if it came through at all)
Javascript on page one:
var JSONstr = JSON.stringify(fullInfoArray);
document.getElementById('JSONfullInfoArray').value= JSONstr;
php on page two:
$data = json_decode($_POST["JSONfullInfoArray"]);
var_dump($data);
echo($_POST["JSONfullInfoArray"]);
The echo works fine but the var_dump returns NULL
What have I done wrong?
This got me fixed up:
$postedData = $_POST["JSONfullInfoArray"];
$tempData = str_replace("\\", "",$postedData);
$cleanData = json_decode($tempData);
var_dump($cleanData);
Im not sure why but the post was coming through with a bunch of "\" characters separating each variable in the string
Figured it out using json_last_error() as sugested by Bart which returned JSON_ERROR_SYNTAX
You'll need to check the contents of $_POST["JSONfullInfoArray"]. If something doesn't parse json_decode will just return null. This isn't very helpful so when null is returned you should check json_last_error() to get more info on what went wrong.