Bezoekersteller met image

<?php
session_start();
ob_start();

################################################################################
#
#	This file contains al the functions
#              Marcel Boersma
#
################################################################################

	class teller{
        function connect($username, $password, $host, $db){//function connect to db
                mysql_connect($host, $username, $password) OR die("There was no connection to the db");//connect to the host
                mysql_select_db($db) OR die("Couldn't connect to database....");//connect to the database
        }

		function check_table(){//open function
			//get table list
			$tables=mysql_query("SHOW TABLES");//get tables
			$counted=mysql_num_rows($tables);//count tables
			if($counted != 0){//check if counted isn't zero
				for($x=0;$x<=$counted-1;$x++){//for each result load result into array
					$table[$x]=mysql_result($tables,$x);//load in array
				}
			}
	
			$table_array="teller";//table name
			if(!in_array($table_array,$table)){//check if exists
				$this->create_table("teller");
			}
		}//close function



	private function create_table($table_name){
			switch($table_name){//switch table name
				case 'teller' :	$table_data="CREATE TABLE `teller` (
							     `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
							     `ip` VARCHAR( 32 ) NOT NULL ,
							     `date` INT NOT NULL 
							     ) TYPE = MYISAM ;";//create data
						mysql_query($table_data);//create table
						$this->check_table;//check again
				break;
			}

		}

		function user_add(){
			$ip=$_SERVER['REMOTE_ADDR'];//get ip address
			if(!isset($_SESSION['ip'])){//check if session exsists
				$_SESSION['ip']=$ip;//make session
				$date=$this->make_date();//make date
				mysql_query("INSERT INTO teller (`ip`, `date`) VALUES ('$ip', '$date')");//insert into the database

			}
		}

		function make_date(){
			//set date
			$month=date("n");//set month
			$day=date("j");//set day
			$year=date("Y");//set year

			$date_now=mktime(0, 0, 0, $month, $day, $year);//make timestamp


		return $date_now;//return timestamp
		}

        function color($color, $index){
            if(strlen($color) != 6){//if color hasn't 6 chars, color is white
                $color='FFFFFF';
            }
            switch($index){//switch index
                case '1' : $splited=substr($color, 0, 2);// index = 1 return the first heximals
                break;
                case '2' : $splited=substr($color, 2, 4);//index = 2 return the second heximals
                break;
                case '3' : $splited=substr($color, 4, 6);//index = 3 return the third heximals
                break;
            }
            $color=hexdec($splited);//get heximals
            return $color;//return heximals
        }

        function picture($month, $year, $x, $y, $color_background, $color_line, $line){
            //background colors
            $color_background1=$this->color($color_background, 1);
            $color_background2=$this->color($color_background, 2);
            $color_background3=$this->color($color_background, 3);
            
            //indexline colors
            $color_line1=$this->color($color_line, 1);
            $color_line2=$this->color($color_line, 2);
            $color_line3=$this->color($color_line, 3);
            
            //line color
            $line1=$this->color($line, 1);
            $line2=$this->color($line, 2);
            $line3=$this->color($line, 3);


			header("Content-type: image/png");//set header
			$im = @imagecreate($x, $y)//create image
   			

			$background=imagecolorallocate($im,$color_background1 , $color_background2, $color_background3);//set background
			$indexline=imagecolorallocate($im, $color_line1, $color_line2, $color_line3);//set indexline color
			$line=imagecolorallocate($im, $line1, $line2, $line3);//set line color

			$numbersofindexline=$y/20;//count index lines
			for($a=0;$a<$numbersofindexline;$a++){
				$ya=$a*20;//heigth of index line
				imageline($im, '0', $ya, '500', $ya, $indexline);//$im=image, x1, y1, x2, y2, color
				imagestring($im, 100, 5, $ya-2,  $y-$ya, $indexline);//index number
			}
            //load visitors out of db for this month
                switch($month){//switch month type
                case '' : $plus=0;//if type is empty mont=0
                break;
                default : if(ctype_digit($month) AND $month <= 12){ $month=$month; }else{ $month=0; }//if type isn't empty and is a number plus is okay, else month = 0
                break;

            }
                 //print month name
                $monthname=date("F");
                imagestring($im, 35, $x-50, $y-($y-25), $monthname, $line);


            $visitors=array();//make array for visitors
            $counted_days_in_month=date('t');//count days in month
            for($a=0 ; $a <= $counted_days_in_month; $a++){
                    $date=mktime(0, 0, 0, date('n')+$month, date('j')+$a , date('Y')+$year);//begin time
                    $qry_count=mysql_query("SELECT * FROM `teller` WHERE date='$date'");//count for each day visitors
                    $counted=mysql_num_rows($qry_count);
                    $visitors[$a]=$counted;//put visitors into array
            }
            
            $inarray=$counted; //values in array is simulair to the counted days
			for($i=0;$i<$inarray-1;$i++){
				$x_1=$i*($x/$inarray);//x divide counted days
				$y_1=$y-$visitors[$i];//counted visitors day one
				$x_2=$x_1+($x/$inarray);//draw line to
				$y_2=$y-$visitors[$i+1];//counted visitors next day
				
				imageline($im, $x_1, $y_1, $x_2, $y_2, $line);//dray line
				imagestring($im, 100, $x_2, $y_2, $visitors[$i+1], $line);//set numbers

			}
			imagepng($im);
			imagedestroy($im);

		}

	}


?>