Line graph using php

I this blog I am sharing a simple code to draw a line graph using php. Here I am using a value_array to hold my data for drawing the graph. If  we wants to draw the graph based on records  from database just replace the values of $value_array. Here I’m assumed that there is only 12 in that array.

$value_array=array();

$value_array[1] = 3500;

$value_array[2] = 2000;

$value_array[3] = 5000;

$value_array[4] = 500;

$value_array[5] = 2500;

$value_array[6] = 5;

$value_array[7] = 4250;

$value_array[8] = 1110;

$value_array[9] = 3720;

$value_array[10] = 1190;

$value_array[11] = 2670;

$value_array[12] = 440;

$array_count=count($value_array);

                $imagewd=600; //X value

                $imageht=550; //Y value

                $image=imagecreate($imagewd,$imageht);

                $colo=imagecolorallocate($image,55,55,55);

                $drcol=imagecolorallocate($image,00,00,00);

                $graph_col=imagecolorallocate($image,00,00,255);

                $text_color=imagecolorallocate($image,00,200,20);

                //-------------Horizontal Lines----------------------------------------------

                $cord1 = 50;

                while($cord1<=500){

                                imageline($image,0,$cord1,900,$cord1,$drcol);

                                $cord1 = $cord1+50;

                                }

//-------------End Horizontal Lines------------------------------------------

//-------------Vertical Lines------------------------------------------------

                $cord2 = 50;

                while($cord2<=600){

                                imageline($image,$cord2,0,$cord2,600,$drcol);

                                $cord2 = $cord2+50;

                                }

//-------------End Vertical Lines-------------------------------------------

$x1=0;

$y1=550;

$x2=0;

$y2=0;

imagesetthickness($image,3);//code changing thickness of graph

//Drawing Graph depending upon values---------------------

                for($i=1;$i<=$array_count;$i++){

                                $graph_value=$value_array[$i]*50/500;

                                $x2=$x1+50;

                                $y2=550-$graph_value;

                                imageline($image,$x1,$y1,$x2,$y2,$graph_col);

                                imagestring($image,4,$x2-10,$y2-13,$value_array[$i],$text_color); //Printing value's of each points

                                $x1=$x2;

                                $y1=$y2;

                }

                header("content-Type:image/jpeg");

                imagejpeg($image);

                imagedestroy($image);    

?>

I used following code to embed this graph to my html page.

                          

                                

                                                

                                                               

                                                                

                                                                                5000

                                                                                

                                                                

                                                                

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