PHP instance resolution: watermarks uploaded images

Last Update:2018-12-07 Source: Internet

Author: User

Tags imagecopy imagejpeg

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Introduction: this is an example of PHP parsing: A detailed page for adding a watermark to an uploaded image. It introduces PHP, related knowledge, skills, experience, and some PHP source code.

Class = 'pingjiaf' frameborder = '0' src = 'HTTP: // biancheng.dnbc?info/pingjia.php? Id = 323148 'rolling = 'no'>

I believe everyone knows how to add watermarks to images. Here we will teach you how to add watermarks to uploaded images.

Use PHP to add watermarks to uploaded imagesProgramIt is to create a graph by determining the file type, copy it to the original graph, fill 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. If you are familiar with the GD library of PHP, read this article.ArticleIt's not hard at all!

The following is a reference clip:

Reference content is as follows:

/*************************************** **************

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 );

Instructions for use:

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.knowsky.com/php.asp;

**************************************** ************/

// 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, 2 indicates the lower right corner, 3 indicates the upper left corner, 4 indicates the upper right corner, and 5 indicates the center );

$ Waterstring = "http://www.xplore.cn/"; // 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 </title>
<Style type = "text/CSS">
<! --
Body
{
Font-size: 9pt;
}
Input
{
Background-color: #66 CCFF;
Border: 1px inset # cccccc;
}
-->
</Style>
</Head>
<Body>
<Form enctype = "multipart/form-Data" method = "Post" name = "upform">
Upload files:
<Input name = "upfile" type = "file">
<Input type = "Submit" value = "Upload"> <br>
The file type that can be uploaded is: <? = Implode (',', $ uptypes)?>
</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 "<font color = Red> uploaded successfully </font> <br> File Name:
<Font color = blue> ". $ destination_folder. $ fname." </font> <br> ";
Echo "width:". $ image_size [0];
Echo "Length:". $ image_size [1];
Echo "<br> 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: <br> ";
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>

"Php instance parsing: Adding watermarks to uploaded images"

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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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