PHP image watermarking code example parsing

PHP image watermarking code example parsing _ PHP Tutorial

Last Update:2017-05-13 Source: Internet

Author: User

Tags imagecopy imagejpeg

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PHP image watermark code example parsing. 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 website. when you need to upload images, you often need to add LOGO watermarks to your website. So how to implement this step? First, let's get to know

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;

PHP image watermarking code example:

 
 
  
  // 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 = "<A href =" http://www.xplore.cn/">
  
  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
  
  ?>
  
  <Html>
  
  <Head>
  
  <Title> ZwelL image upload program 
  
  <Style type = "text/css">
  
    
  
  </Style>
  
  </Head>
  
  <Body>
  
  <Form enctype = "multipart/form-data"
  
  Method = "post" name = "upform">
  
  Upload files:
  
   
  
  <Input type = "submit" value = "upload"> <br>
  
  The file types that can be uploaded are:  
  
  </Form>
  
  <? Php
  
  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
  
  </Font>
File name:
  
  <Font color = blue> ". $ destination_folder.
  
  $ Fname. "</font> <br> ";
  
  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 "<br> image preview:
";
  
  Echo "<ccid_file values =" "width = ".
  
  ($ Image_size [0] * $ imgpreviewsize )."
  
  Height = ". ($ image_size [1] * $ imgpreviewsize );"
  
  Echo "alt =" image preview: r File name :".
  
  $ Destination. "r Upload Time:"/> ";
  
  }
  
  }
  
  ?>
  
  </Body>
  
  </Html>

The above code example shows how to add watermarks to PHP images.

Bytes. So how to implement this step? First let's get to know through...

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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