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POMake JSON obj and send it via jQuery AJAX to PHP and respond to it
 

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  1. POMake JSON obj and send it via jQuery AJAX to PHP and respond to it
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    <p>i'm working on this now for about 2-3 hours and i cant find where i'm doing it wrong. this is my jQuery that is going to build an object:</p> <pre><code>var data = {cat:[],count:[],size:[],type:[],print:[]}; $("#Cat-list option").each(function() {data.cat.push($(this).val());}); $("#Count-list option").each(function() {data.count.push($(this).val());}); $("#Size-list option").each(function() {data.size.push($(this).val());}); $("#Print-list option").each(function() {data.print.push($(this).val());}); $("#Type-list option").each(function() {data.type.push($(this).val());}); </code></pre> <p>after this i will have an object named data. when i convert the obj to JSON by <code>var jsonString=JSON.stringify(data);</code> it gives me something like this:</p> <pre><code>{ "cat":["Cart Visit","Bag","Envelope","Tracket","Brosur"], "count":["1000","2000","4000","5000","?????"], "size":["S","M","L","X"], "type":["?? ??","??? ? ??","????"], "print":["????","???????","????"] } </code></pre> <p>then i use jQuery Ajax to send the jsonstring to my php file like this:</p> <pre><code>$.ajax({ type: "POST", url: 'update_db.php', data: jsonString, contentType: "application/json; charset=utf-8", success: function(result) { $( "#alert").html( result ); } }); </code></pre> <p>and finally i'm trying to recieve the data with php script. i dont know how to fetch the data for this i tried it with 'jsonstring' and 'data':</p> <pre><code>$json = json_decode( $_POST['jsonstring']); $data = json_decode( $_POST['data']); var_dump($json); var_dump($data); </code></pre> <p>but both are "NULL". What am I doing wrong?</p>
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    1. USbrasofilo
    1. USBabakslt
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    1. COI think when you're sending the data to php from ajax, you have to do this: `data: {'jsonstring': jsonString}`. Then when getting the post data, you can do `json_decode($_POST['jsonstring'])`. Your jsonString will be in the post variable `jsonstring`.
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      1. USsulavvr
    2. COpossible duplicate of [How to get body of a POST in php?](http://stackoverflow.com/questions/8945879/how-to-get-body-of-a-post-in-php)
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      1. USQuentin
    3. CO@flyingDuck - serialising data as `application/json` and then *again* as `application/x-www-form-urlencoded` is not ideal. The asker has deliberately specified `contentType: 'application/json'`, so I assume that's what they actually want.
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      1. UScloudfeet
 

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