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how to create graphics using php
Creating geometrical shape using php
Jeetender
Answer
1

Creating geometrical shape using php
<?php
create_image();
print "<img src=image.png?".date("U").">";

function  create_image(){
        $im = @imagecreate(200, 200) or die("Cannot Initialize new GD image stream");
        $background_color = imagecolorallocate($im, 255, 255, 0);   // yellow
        $red = imagecolorallocate($im, 255, 0, 0);                  // red
        $blue = imagecolorallocate($im, 0, 0, 255);                 // blue
        
        imagearc($im, 100, 60, 100, 100, 0, 360, $red);

        imagefilledarc($im, 20, 150, 40, 60, 0, 90, $blue, IMG_ARC_PIE);
        imagefilledarc($im, 70, 150, 40, 60, 0, 180, $blue, IMG_ARC_PIE);
        imagefilledarc($im, 120, 150, 40, 60, 0, 270, $blue, IMG_ARC_PIE);
        imagefilledarc($im, 170, 150, 40, 60, 0, 360, $blue, IMG_ARC_PIE);
        
        imagepng($im,"image.png");
        imagedestroy($im);
}
?>


<?php 
  // create an array of values for the chart. These values 
  // could come from anywhere, POST, GET, database etc. 
  $values = array(23,32,35,57,12,3,36,54,32,15,43,24,30); 

  // now we get the number of values in the array. this will 
  // tell us how many columns to plot 
    $columns  = count($values); 

  // set the height and width of the graph 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 ; 

  // set the graph color 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); 

  // set the background color of the graph 
    imagefilledrectangle($im,0,0,$width,$height,$white); 


  // Calculate the maximum value we are going to plot 
  $max_value = max($values);

  // loop over the array of columns 
    for($i=0;$i<$columns;$i++) 
        {
    // set the column hieght for each value 
        $column_height = ($height / 100) * (( $values[$i] / $max_value) *100); 
    // now the coords
        $x1 = $i*$column_width; 
        $y1 = $height-$column_height; 
        $x2 = (($i+1)*$column_width)-$padding; 
        $y2 = $height; 

        // write the columns over the background 
        imagefilledrectangle($im,$x1,$y1,$x2,$y2,$gray); 

        // This gives the columns a little 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); 
        } 

   // set the correct png headers 
   header ("Content-type: image/png"); 
  // spit the image out the other end 
  imagepng($im); 
?>
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