POST json data using form
{"method":"like","data":{"type":1,"id":123}}

<script>
jQuery(document).ready(function(){
jQuery("#form").submit();
});
</script>

$(document).ready(function(){
    $.post("script.php", { <?php echo $string; ?> },
       function() {
         alert("Your test.php page received the string!);
       });
});