A regular website, in the need to upload pictures, often need to add their own website logo watermark. So how do you implement this step? First of all, let us understand the principle of PHP image plus watermark.
Create a graph by judging the file type, and then copy it to the original created graph, populate and build the rectangle, prepare to write imagestring () or determine the watermark type in the original image program: One is the string, and the other is to add a graphic object on it. The following is the PHP image plus watermark reprint!
Parameter description:
$max _file_size: Upload file size limit, unit byte
$destination _folder: Upload file path
$watermark: Whether additional watermark (1 is watermark, the other is not watermark);
PHP Image plus watermark Usage Description:
1. Remove the "Extension=php_gd2.dll" line in the php.ini file, because we need to use the GD library;
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 Watermark code example:
Copy CodeThe 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; Upload file size limit, unit byte
$destination _folder= "uploadimg/"; Upload file path
$watermark = 1; Whether additional watermark (1 is watermark, the other is not watermark);
$watertype = 1; Watermark Type (1 for text, 2 for picture)
$waterposition = 1; Watermark position (1 is lower left corner, 2 is lower right corner
, 3 is the upper left corner, 4 is the upper right corner, 5 is centered);
$waterstring = "
http://www.xplore.cn/"; Watermark String
$waterimg = "Xplore.gif"; Watermark Picture
$imgpreview = 1; Whether to generate a preview map (1 is generated, others are not generated);
$imgpreviewsize =1/2; Thumbnail scale
?>
<title>Zwell Picture Uploading Program</title>
if ($_server[' request_method '] = = ' POST ')
{
if (!is_uploaded_file ($_files["Upfile")
[Tmp_name]))
Whether the file exists
{
echo "Picture does not exist!";
Exit
}
$file = $_files["Upfile"];
if ($max _file_size < $file ["size"])
Check File size
{
echo "File too big!";
Exit
}
if (!in_array ($file ["type"], $uptypes))
Check file types
{
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) &&
$overwrite! = True)
{
echo "file with the same name already exists";
Exit
}
if (!move_uploaded_file ($filename,
$destination))
{
echo "Error moving File";
Exit
}
$pinfo =pathinfo ($destination);
$fname = $pinfo [basename];
echo "has been successfully uploaded
Filename:
". $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, 0,0,0);
$red =imagecolorallocate ($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 type");
Exit
}
Imagecopy ($nimage, $simage, 0,0,0,0,
$image _size[0], $image _size[1]);
Imagefilledrectangle ($nimage, 1,
$image _size[1]-15,80, $image _size[1], $white);
Switch ($watertype)
{
Case 1://Add watermark String
Imagestring ($nimage, 2,3, $image _size[1]-15,
$waterstring, $black);
Break
Case 2://Add watermark Picture
$simage 1 =imagecreatefromgif ("Xplore.gif");
Imagecopy ($nimage, $simage 1,0,0,0,0,85,15);
Imagedestroy ($simage 1);
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, $destination);
Break
}
Overwrite the original upload file
Imagedestroy ($nimage);
Imagedestroy ($simage);
}
if ($imgpreview ==1)
{
echo "
Picture preview:
";
echo " Height=. ($image _size[1]* $imgpreviewsize); "
echo "alt=\" Picture preview: \ r file name: ". The
$destination. \ r upload time: \ "/>";
}
}
?>
You can also refer to the image watermark PHP class
http://www.bkjia.com/phpjc/321772.html www.bkjia.com true http://www.bkjia.com/PHPjc/321772.html techarticle a regular site, in the need to upload pictures, often will need to add their own site logo watermark on the image. So how do you implement this step? First let's look at Php pictures ...
