Problema di cartella allora ?


Altrimenti.

Codice PHP:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script language="JavaScript" type="text/javascript">
<!--
function saveData(text){
 //dataString e' un array di array
 var a = new Array();
 a[0]  = new Array(10,11,12,13);
 var jsonString = JSON.stringify(a);
 $.ajax({
 type: "GET",
 url: "script.php",
 data: {data : jsonString}, 
 cache: false,
 success: function(){
 alert("OK");
 }
 });
 }
//-->
</script>
</head>
<body>
<input type="button" value="ok" onclick="saveData('pippo')" />
</body>
</html> 

script.php
Codice PHP:
<?php
 $data = json_decode($_GET['data']);
 file_put_contents('filename.txt', print_r($data, true));
Dà filename.txt
codice:
Array
(
    [0] => Array
        (
            [0] => 10
            [1] => 11
            [2] => 12
            [3] => 13
        )
)