// This array of values is just here for the example.
 
    $values = array("23","32","35","57","12",
                    "3","36","54","32","15",
                    "43","24","30");
 
// Get the total number of columns we are going to plot
 
    $columns  = count($values);
 
// Get the height and width of the final image
 
    $width = 300;
    $height = 200;
 
// Set the amount of space between each column
 
    $padding = 5;
 
// Get the width of 1 column
 
    $column_width = $width / $columns ;
 
// Generate the image variables
 
    $im        = imagecreate($width,$height);
    $gray      = imagecolorallocate ($im,0xcc,0xcc,0xcc);
    $gray_lite = imagecolorallocate ($im,0xee,0xee,0xee);
    $gray_dark = imagecolorallocate ($im,0x7f,0x7f,0x7f);
    $white     = imagecolorallocate ($im,0xff,0xff,0xff);
 
// Fill in the background of the image
 
    imagefilledrectangle($im,0,0,$width,$height,$white);
 
    $maxv = 0;
 
// Calculate the maximum value we are going to plot
 
    for($i=0;$i<$columns;$i++)$maxv = max($values[$i],$maxv);
 
// Now plot each column
 
    for($i=0;$i<$columns;$i++)
    {
        $column_height = ($height / 100) * (( $values[$i] / $maxv) *100);
 
        $x1 = $i*$column_width;
        $y1 = $height-$column_height;
        $x2 = (($i+1)*$column_width)-$padding;
        $y2 = $height;
 
        imagefilledrectangle($im,$x1,$y1,$x2,$y2,$gray);
 
// This part is just for 3D effect
 
        imageline($im,$x1,$y1,$x1,$y2,$gray_lite);
        imageline($im,$x1,$y2,$x2,$y2,$gray_lite);
        imageline($im,$x2,$y1,$x2,$y2,$gray_dark);
 
    }
 
// Send the PNG header information. Replace for JPEG or GIF or whatever
 
    header ("Content-type: image/png");
    imagepng($im);