getting an error in a PHP program

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  15 years ago

  by ananth_ram

  ananth ram

  Hyderabad, India

  Joined 15 years ago

  Hi all,
    I tried to create a dynamic button using PHP and I'm getting the following warning.
  

  
          imagejpeg(): supplied argument is not a valid Image resource.
  

  
  The code I've written is
  

  
  <?php
   
   class Button
    {
      private $image;
      public function construct($width,$label,$font)
      {
        $this->image=imagecreate($width,$height);
        $colorbody=imagecolorallocate($this->image,099,099,099);
        $colorshadow=imagecolorallocate($this->image,033,033,033);
        $colorHighlight=imagecolorallocate($this->image,0CC,0CC,0CC);
       
        //create body of the button
        imagefilledrectangle($this->image,1,1,$width-2,$height-2,$colorbody);
        //draw bottom shadow
        imageline($this->image,0,$height-1,$width-1,$height-1,$colorshadow);
        //draw right shadow
        imageline($this->image,$width-1,1,$width-1,$height-1,$colorshadow);
        //draw top highlight
        imageline($this->image,0,0,$width-1,0,$colorHighlight);
        //draw left highlight
        imageline($this->image,0,0,0,$height-2,$colorHighlight);
        //determine label size
        $labelheight=imagefontheight($font);
        $labelwidth=imagefontwidth($font)strlen($label);
        //determine label upper left corner
        $labelX=($width-$labelwidth)/2;
        $labelY=($height-$labelheight)/2;
        //draw label shadow
        imagestring($this->image,$font,$labelX+1,$labelY+1,$label,$colorshadow);
        //draw label
        imagestring($this->image,$font,$labelX+1,$labelY+1,$label,$colorhighlight);
      }
      public function drawPNG() {
        header("Content-type:image/png");
        imagepng($this->image);
     }
      public function drawJPEG() {
        header("Content-type:image/jpeg");
        imagejpeg($this->image);
     }
  }
  //set parameters if not given
  if(!isset($REQUEST['width']))
  {
    $REQUEST['width']=100;
   }
   if(!isset($REQUEST['height']))
  {
    $REQUEST['height']=30;
   }
   if(!isset($REQUEST['label']))
  {
    $REQUEST['label']="click";
   }
   if(!isset($REQUEST['font']))
  {
    $REQUEST['font']=5;
   }
   $b=new Button($REQUEST['width'],$REQUEST['height'],$REQUEST['label'],$REQUEST['font']);
   $b->drawPNG();
  ?>        
  

  
  I'm unable to find the mistake in my code. can anybody help me?

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