<?php 
include("config.php");


$num_result = mysql_query ("SELECT * FROM ". TABLE_USER ."") or die (mysql_error());

$totaldata = mysql_num_rows($num_result);


$result=mysql_query("SELECT * FROM ". TABLE_USER ." ORDER BY user_id LIMIT ".$_POST['start'].", ".$_POST['limit']." ")
 or die (mysql_error ());

$data = array();
	  
	while ($row=mysql_fetch_object($result))
	{
	    $data [] = $row;
	}
	echo "".$data['user_id']."";
	echo '({"total":"'.$totaldata.'","results":'.json_encode($data).'})';
 ?>

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1