- JavaScript -

<script>
    $.get("getip.php", function(data)
    {
        alert("Your IP Address is : "+data);
    });
</script>

<?php
    header('Cache-Control: no-cache, must-revalidate');
    header('Expires: Mon, 1 Jan 1990 00:00:00 GMT');
    header('Content-type: application/json');

    $ip="unknown";
    if ( !empty($_SERVER['HTTP_CLIENT_IP']))
    {
        $ip=$_SERVER['HTTP_CLIENT_IP'];
    }
    elseif (    !empty($_SERVER['HTTP_X_FORWARDED_FOR']))
    {
        $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
    }
    else
    {
        $ip=$_SERVER['REMOTE_ADDR'];
    }
    echo $ip;
?>

<script>
var dat = JSON.stringify(dataToSend);
$.post( "process.php", dat,function(data)
{             
    alert("Response: " + data);
});
</script>

var dat = JSON.stringify(dataToSend);
$.post('process.php', { data: dat}, function(data){ alert(data)}, "text");

postdata={ "val" : value, "val2":value2, "val3":"a value"};
$.post('callme.php', postdata, function(data)
{
document.location.reload(true);
});

var    data =
{
    "array1":    {
        "value1":100 ,
        "value2":50     } ,
    
    "array2":    {
        "value1":500 ,
        "value2":500     } ,
    
    "array3":{    
        "value1":124 ,
        "value2":353     }
};

jsdata = eval( JSONDATA );

jsdata = eval( '(' + JSONDATA + ')' );

<?php
$data= array(
'arr1' => array('v1'=>1,'v2'=>2),
'arr2' => array('v1'=>1,'v2'=>2),
'arr3' => array('v1'=>1,'v2'=>2));    

echo json_encode($data);
?>

<?php
$arr = array ('Key1'=>1,'Key2'=>2,'Key3'=>3,'Key4'=>4);
echo json_encode($arr);
?>