Php image watermarking and image uploading watermarking php _ PHP Tutorial

Php class for adding watermarks to php images and uploading images. When you need to upload images to a regular website, you often need to add the LOGO watermark of your website to the image. So how to implement this step? First of all, let's take a look at a regular PHP image website. when you need to upload images, you often need to add LOGO watermarks for your website on the images. So how to implement this step? First, let's take a look at the principles of adding watermarks to PHP images.
Create an image by determining the file type, copy it to the original image, fill it with and create a rectangle for writing it into imagestring (), or determine the watermark type in the original image program: one is a string, and the other is to add a graphic object to it. Below is a PHP image watermark reprinted!

Parameter description:

$ Max_file_size: size limit of the uploaded file, in bytes
$ Destination_folder: File Upload path
$ Watermark: whether to add a watermark. (1 indicates adding a watermark; others indicates not adding a watermark );

PHP image watermark instructions:
1. remove the number before the line "extension = php_gd2.dll" in the PHP. ini file because the GD library is used;
2. change extension_dir = to the directory where your php_gd2.dll is located;
3. http://www.jb51.net/list/list_15_1.htm
PHP image watermarking code example:

The code is as follows:

// Upload file type list
$ Uptypes = array (
'Image/jpg ',
'Image/jpeg ',
'Image/png ',
'Image/pjpeg ',
'Image/GIF ',
'Image/bmp ',
'Image/x-png'
);
$ Max_file_size = 2000000; // size limit of uploaded files, in bytes
$ Destination_folder = "uploadimg/"; // file Upload path
$ Watermark = 1; // whether to add a watermark. (1 indicates adding a watermark. otherwise, no watermark is added );
$ Watertype = 1; // watermark type (1 is text, 2 is image)
$ Waterposition = 1; // watermark position (1 indicates the lower left corner and 2 indicates the lower right corner
, 3 is the upper left corner, 4 is the upper right corner, and 5 is the center );
$ Waterstring ="
Http://www.xplore.cn/</A> "; // 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




If ($ _ SERVER ['request _ method'] = 'post ')
{
If (! Is_uploaded_file ($ _ FILES ["upfile"]
[Tmp_name])
// Whether a file exists
{
Echo "the image does not exist! ";
Exit;
}
$ File = $ _ FILES ["upfile"];
If ($ max_file_size <$ file ["size"])
// Check the file size
{
Echo "the file is too large! ";
Exit;
}
If (! In_array ($ file ["type"], $ uptypes ))
// Check the file type
{
Echo "file type does not match! ". $ File [" type "];
Exit;
}
If (! File_exists ($ destination_folder ))
{
Mkdir ($ destination_folder );
}
$ Filename = $ file ["tmp_name"];
$ Image_size = getimagesize ($ filename );
$ Pinfo = pathinfo ($ file ["name"]);
$ Ftype = $ pinfo ['extension'];
$ Destination = $ destination_folder.
Time (). ".". $ ftype;
If (file_exists ($ destination )&&
$ Overwrite! = True)
{
Echo "a file with the same name already exists ";
Exit;
}
If (! Move_uploaded_file ($ filename,
$ Destination ))
{
Echo "an error occurred while moving the file ";
Exit;
}
$ Pinfo = pathinfo ($ destination );
$ Fname = $ pinfo [basename];
Echo "uploaded successfully

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, 255, 0, 0 );
Imagefill ($ nimage, 0, 0, $ 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 a watermark string
Imagestring ($ nimage, 2, 3, $ image_size [1]-15,
$ Waterstring, $ black );
Break;
Case 2: // add a 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" Height = ". ($ image_size [1] * $ imgpreviewsize );"
Echo "alt = \" image preview: \ r File name :".
$ Destination. "\ r Upload Time: \"/> ";
}
}
?>

You can also refer to the PHP class for adding watermarks to images.

Bytes. So how to implement this step? First, let's take a look at the PHP image...