PHP watermarking code (supports translucent and transparent watermarking, supports png transparent background)_PHP tutorial

//Original image
$dst = "/upload/20120914/20120914040740- 0.jpg"; //Note that the image path must be correct
//Get the original image information
$dst_info = getimagesize($dst);
switch ($dst_info[2])
{
case 1:
$dst_im =imagecreatefromgif($dst);break;
case 2:
case 3:
$dst_im = imagecreatefrompng($dst);break;
case 6:
$dst_im =imagecreatefromwbmp($dst);break;
default:
die("Unsupported file type 1");exit;
                                                                                                                                                                                      $src_info[2])
                                                                                                                                          
case 3:
$src_im =imagecreatefrompng($src);break;
case 6:
$src_im =imagecreatefromwbmp($src);break;
default:
        die( "Unsupported file type 1");exit;
                                                                                                               dst_im,$src_im,$dst_info[0]-$src_info[0]-10,$dst_info[1]-$src_info[1]-10,0,0,$src_info[0],$src_info[1],$ alpha);

//How to support the transparency of png itself
imagecopy($dst_im,$src_im,$dst_info[0]-$src_info[0]-10,$dst_info[1]-$src_info [1]-10,0,0,$src_info[0],$src_info[1]);

//Save the picture
switch ($dst_info[2]){
case 1 :
imagegif($dst_im,$dst);break;
case 2:
imagejpeg($dst_im,$dst);break;
case 3:
imagepng($dst_im,$ dst);break;
case 6:
imagewbmp($dst_im,$dst);break;
default:
die("Unsupported file type 2");exit;
}
imagedestroy($dst_im);
imagedestroy($src_im);






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