อยากทราบเรื่องการให้ข้อมูลมาเเสดงโดยอัตโนมัติ รบกวนด้วยนะครับ

<?php
	$objConnect = mysql_connect("localhost","admin","0000");
	$objDB = mysql_select_db("data");
	
	
	
   
    $strid = $_POST["id"];
	$meter_old = $_POST["meter_old"];
	$meter_present = $_POST["meter_presen"];

	/*** Check  ***/
	$strSQL = "SELECT * FROM data WHERE cardid = '".$cardid."' AND cardid != '".$cardid."' ";

	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if($objResult)
	{
		$arr['StatusID'] = "0"; 
		$arr['Error'] = "cardid";	
		echo json_encode($arr);
		exit();
	}
	
	/*** Update ***/
	$strSQL = " UPDATE datawater SET
		meter_old = '".$meter_old."'
		,meter_present = '".$meter_present."'
		
		WHERE cardid = '".$cardid."'
	";

	$objQuery = mysql_query($strSQL);
	if(!$objQuery)
	{
		$arr['StatusID'] = "0"; 
		$arr['Error'] = "Cannot save data!";	
	}
	else
	{
		$arr['StatusID'] = "1"; 
		$arr['Error'] = "";	
	}

	/**
		$arr['StatusID'] // (0=Failed , 1=Complete)
		$arr['Error'] // Error Message
	*/
	
	mysql_close($objConnect);
	
	echo json_encode($arr);
?>