PHP: code used to add a watermark to a downstream image

PHP: the program code used to add a watermark to the uploaded image. The program used PHP to add a watermark to the uploaded image creates a graph by determining the file type, and then copies it to the original image, fill in and create a rectangle for writing the image string () or determine the watermark type in the original image program: one is a string, and the other is to add a graphic object on it. If you are familiar with the GD library of PHP, it is not difficult to understand this article! * ******* PHP: the program code that watermarks uploaded images
The program that uses PHP to add a watermark to the uploaded image is to create a graph by determining the file type, copy it to the original image, fill it with and create a rectangle for writing it to imagestring () or determine the watermark type in the original image program: one is a string, and the other is to add a graphic object on it. If you are familiar with the GD library of PHP, it is not difficult to understand this article!

/*************************************** * ************* Parameter description: $ max_file_size: the size limit of the uploaded file. unit: BYTE $ destination_folder: upload file path $ watermark: whether to append the watermark (1 indicates adding the watermark, and others indicates not adding the watermark). usage: 1. set PHP. remove the SN of the line "extension = php_gd2.dll" in the INI file because the GD library is used. 2. change extension_dir = to the directory where your php_gd2.dll is located; **************************************** * ********** // list of uploaded File Types $ uptypes = array ('image/jpg ', 'image/jpeg ', 'image/png', 'image/pjpeg ', 'image/g If ', 'image/bmp', 'image/x-png '); $ max_file_size = 2000000; // The size of the uploaded file is limited. the unit is BYTE $ destination_folder = "uploadimg /"; // upload file path $ watermark = 1; // whether to append the watermark (1 is a watermark, others are not a watermark); $ watertype = 1; // watermark type (1 is a text, 2 for the image) $ waterposition = 1; // watermark position (1 for the lower left corner, 2 for the lower right corner, 3 for the upper left corner, 4 for the upper right corner, 5 for the center ); $ waterstring = "http://www.hackhome.com/"; // watermark string $ waterimg = "xplore.gif"; // watermark image $ imgpreview = 1; // whether to generate a preview image (1 is generated, others are not generated); $ imgpreviewsize = 1/2; // Thumbnail ratio?>

ZwelL image upload program
 File name: ". $ destination_folder. $ fname ."
"; Echo" width: ". $ image_size [0]; echo" length: ". $ image_size [1]; echo"
Size :". $ file ["size"]. "bytes"; if ($ watermark = 1) {$ iinfo = getimagesize ($ destination, $ iinfo); $ nimage = imagecreatetruecolor ($ image_size [0], $ image_size [1]); $ white = imagecolorallocate ($ nimage, 255,255,255); $ black = imagecolorallocate ($ nimage, 0, 0); $ red = imagecolorallocate ($ nimage,, 0, 0); imagefill ($ nimage, $ white); switch ($ iinfo [2]) {case 1: $ simage = imagecreatefromgif ($ destination); break; case 2: $ simage = imagecreatefromjpeg ($ destination); break; case 3: $ simage = imagecreatefrompng ($ destination); break; case 6: $ simage = imagecreatefromwbmp ($ destination ); break; default: die ("unsupported file types"); exit;} imagecopy ($ nimage, $ simage, 0, 0, 0, $ image_size [0], $ image_size [1]); imagefilledrectangle ($ nimage, 1, $ image_size [1]-15, 80, $ image_size [1], $ white); switch ($ watertype) {case 1: // add the watermark string imagestring ($ nimage, 2, 3, $ image_size [1]-15, $ waterstring, $ black); break; case 2: // watermark image $ simage1 = imagecreatefromgif ("xplore.gif"); imagecopy ($ nimage, $ simage1,); imagedestroy ($ simage1); break ;} switch ($ iinfo [2]) {case 1: // imagegif ($ nimage, $ destination); imagejpeg ($ nimage, $ destination); break; case 2: imagejpeg ($ nimage, $ destination); break; case 3: imagepng ($ nimage, $ destination); break; case 6: imagewbmp ($ nimage, $ destination ); // imagejpeg ($ nimage, $ destination); break;} // overwrite the original uploaded file imagedestroy ($ nimage); imagedestroy ($ simage );} if ($ imgpreview = 1) {echo"
Image preview:
"; Echo" ";}}?>