ถ้าต้องการสร้างเงื่อนไขโดยถ้า status == Y นั้นจะไม่ให้หน้านั้นเก็บค่าตัวแปรใดๆ หรือไม่ให้หน้านั้นกระทำใดๆเขียนยังไงหรอค่ะ

else if($_POST['Cmd']== 'Set_F')
	{
	 $Str_Fvalue = explode('|', $_POST['Fvalue']);
	 $Str_Fieldid =   $_POST['Fieldid'];
	 $Str_Dvalue =  $_POST['Dvalue'];
	 $Str_SqlUpdate = "UPDATE carsales_detail ";	
	 $Str_SqlUpdate .= "SET ". $Str_Fieldid."='". 	$Str_Dvalue."'";			
	 $Str_SqlUpdate .= "WHERE (carsales_id =  '" .$Str_Fvalue[0] ."' AND carsales_year =  '" .$Str_Fvalue[1] ."' AND carsales_month =  '" .$Str_Fvalue[2] ."' AND SA1BRN =  '" .$Str_Fvalue[3] ."' AND SA1MON =  '" .$Str_Fvalue[4] ."' AND SA1SEQ =  '" .$Str_Fvalue[5] ."' AND SA1SMN =  '" .$Str_Fvalue[6] ."' AND SA1DTE =  '" .$Str_Fvalue[7] ."' AND SA1PRD =  '" .$Str_Fvalue[8] ."' AND SA1TNM =  '" .$Str_Fvalue[9] ."' AND SA1STY =  '" .$Str_Fvalue[10] ."' AND SA1SER =  '" .$Str_Fvalue[11] ."' AND SA1ISU =  '" .$Str_Fvalue[12] ."')" ;
	 $dblink->query($Str_SqlUpdate);
	/*	 
	 print_r($Str_Fvalue);
	 echo $Str_Fieldid ."\r\n";
	 echo $Str_Dvalue;*/
	} 
	else if($_POST['Cmd']== 'Set_Status')
	{
	 $Str_Fvalue = explode('|', $_POST['Fvalue']);
	 $Str_Fieldid = $_POST['Fieldid'];
	 $Str_Dvalue =  $_POST['Dvalue'];
	 $Str_SqlUpdate = "UPDATE carsales_detail ";	
	 $Str_SqlUpdate .= "SET status_chk ='". 	$Str_Fieldid."'";	
	 $Str_SqlUpdate .= ",comment ='". 	$Str_Dvalue."'";	 
	 $Str_SqlUpdate .= "WHERE (carsales_id =  '" .$Str_Fvalue[0] ."' AND carsales_year =  '" .$Str_Fvalue[1] ."' AND carsales_month =  '" .$Str_Fvalue[2] ."' AND SA1BRN =  '" .$Str_Fvalue[3] ."' AND SA1MON =  '" .$Str_Fvalue[4] ."' AND SA1SEQ =  '" .$Str_Fvalue[5] ."' AND SA1SMN =  '" .$Str_Fvalue[6] ."' AND SA1DTE =  '" .$Str_Fvalue[7] ."' AND SA1PRD =  '" .$Str_Fvalue[8] ."' AND SA1TNM =  '" .$Str_Fvalue[9] ."' AND SA1STY =  '" .$Str_Fvalue[10] ."' AND SA1SER =  '" .$Str_Fvalue[11] ."' AND SA1ISU =  '" .$Str_Fvalue[12] ."')" ;
	 $dblink->query($Str_SqlUpdate);
	/* 
	 print_r($Str_Fvalue);
	 echo $Str_Fieldid ."\r\n";
	 echo $Str_Dvalue;*/
	} 
	else if($_POST['Cmd']== 'Set_U')
	{
		$Str_Fvalue = explode('|', $_POST['Fvalue']);
	  $Str_Fieldid =   $_POST['Fieldid'];
	  $Str_Dvalue =  $_POST['Dvalue'];
	  $Str_SqlUpdate = "UPDATE usersales_detail ";	
		$Str_SqlUpdate .= " SET  ". $Str_Fieldid."='".$Str_Dvalue."' ";			
		$Str_SqlUpdate .= " WHERE (usersales_id =  '" .$Str_Fvalue[0] ."' AND user_id =  '" .$Str_Fvalue[1] ."' AND user_saleid =  '" .$Str_Fvalue[2] ."')" ;
		$dblink->query($Str_SqlUpdate);
	/* print_r($Str_Fvalue);
	 echo $Str_Fieldid ."\r\n";
	 echo $Str_Dvalue;*/
	}
	else if($_POST['Cmd']== 'Set_T')
	{
		$Str_Fvalue = explode('|', $_POST['Fvalue']);
		$Str_Fieldid =   $_POST['Fieldid'];
		$Str_Dvalue =  $_POST['Dvalue'];
		$Str_SqlUpdate = "UPDATE usersales_detail ";	
		$Str_SqlUpdate .= " SET user_". $Str_Fieldid."='".$Str_Dvalue."' ";			
		$Str_SqlUpdate .= " WHERE (usersales_id =  '" .$Str_Fvalue[0] ."' AND user_id =  '" .$Str_Fvalue[1] ."' AND user_saleid =  '" .$Str_Fvalue[2] ."')" ;
		$dblink->query($Str_SqlUpdate);
	/*	  echo  $Str_SqlUpdate;
	print_r($Str_Fvalue);
	 echo $Str_Fieldid ."\r\n";
	 echo $Str_Dvalue;*/

	} 
	else if($_POST['Cmd']== 'Read_sEdit')
	{
		$circulation_sql =  "SELECT  circulation_statusedit AS 'StrEdit'  FROM circulation WHERE (circulation_id ='". $Str_GetDate ."' )AND (circulation_type = '000') ;";
		$circulation_result = $dblink->query($circulation_sql); 
		
		if($circulation_result->num_rows >0 )
		{
			$row = $circulation_result->fetch_assoc();
			if(( $_SESSION['CMS'][str_UserType] == 'Admin')||( $_SESSION['CMS'][str_UserType] == 'Administrator'))
			{
				echo "A";
			}
			else
			{
				echo trim($row['StrEdit']); 
			}
		}
		else
		{
			if(( $_SESSION['CMS'][str_UserType] == 'Admin')||( $_SESSION['CMS'][str_UserType] == 'Administrator'))
			{
				echo "A";  
			}
			else
			{
				echo "S"; 
			}
		}
	}
	else if($_POST['Cmd']== 'Read_sEdit_C')
	{
		$circulation_sql =  "SELECT  circulation_statusedit AS 'StrEdit'  FROM circulation WHERE (circulation_id ='".  $_SESSION['CMS']['str_GetDate']  ."' )AND (circulation_type = '000')  ;";
		$circulation_result = $dblink->query($circulation_sql); 
		
		if($circulation_result->num_rows >0 )
		{
			$row = $circulation_result->fetch_assoc();
			if(( $_SESSION['CMS'][str_UserType] == 'Admin')||( $_SESSION['CMS'][str_UserType] == 'Administrator'))
			{
				echo "Y";
			}
			else
			{
				echo trim($row['StrEdit']); 
			}
			
		}
		else
		{
			if(( $_SESSION['CMS'][str_UserType] == 'Admin')||( $_SESSION['CMS'][str_UserType] == 'Administrator'))
			{
				echo "Y";  
			}
			else
			{
				echo "S"; 
			}
			
		}
	}