PHP Add watermark to image example function _php Tutorial

In PHP to implement the image to increase the watermark we have to use a lot of functions, imagecreatefromjpeg,imagecreatefrompng,getimagesize and so on, these are the functions of the PHP GD library, So we have to open the GD library in php.ini to let PHP use these functions to generate image watermark.

The realization of the watermark function is mainly by these function function operation

1.imagecreatefromjpeg//Open JPG image 2.imagecreatefromgif//open GIF picture
3.imagecreatefrompng//Open PNG image
4.imagecreatefromwbmp//Open wbmp picture (less)
5.getimagesize//Get picture size information
6.imagecopymerge//Integrate multiple images (the main function of adding watermarks)
7.imagejpeg//Save JPG Images
8.imagegif//Save GIF pictures
9.imagepng//Save PNG images

The code is as follows

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Echo Img_water_mark ("1.jpg", "walter.gif", NULL, "2.jpg", 5,80); /** * Image plus watermark (for png/jpg/gif format) * * @author FLYNETCN * * @param $srcImg Original picture * @param $waterImg watermark Picture * @param $savepath Save path * @param $savename Save name * @param $positon Watermark Location * 1: Top left, 2: Top right, 3: center, 4: Bottom station left, 5: Bottom of Right * @param $alpha Transparency--0: Completely transparent, 100: completely opaque * * @return Success--The new image address after adding watermark * Failure---1: The original file does not exist,-2: Watermark picture does not exist,-3: Original file image object failed to build *-4: Watermark file Image Object build failed-5: New picture saved after Watermark failed */ function Img_water_mark ($SRCIMG, $WATERIMG, $savepath =null, $savename =null, $positon =5, $alpha =30) { $temp = PathInfo ($SRCIMG); $name = $temp [basename]; $path = $temp [dirname]; $exte = $temp [extension]; $savename = $savename? $savename: $name; $savepath = $savepath? $savepath: $path; $savefile = $savepath. " /". $savename; $srcinfo = @getimagesize ($SRCIMG); if (! $srcinfo) { return-1; The original file does not exist } $waterinfo = @getimagesize ($WATERIMG); if (! $waterinfo) { Return-2; Watermark picture does not exist } $SRCIMGOBJ = Image_create_from_ext ($SRCIMG); if (! $srcImgObj) { return-3; The original file image object failed to build } $WATERIMGOBJ = Image_create_from_ext ($WATERIMG); if (! $waterImgObj) { return-4; Failed to build Watermark file image Object } Switch ($positon) { 1 Top Left Case 1: $x = $y = 0; Break 2 top Right Case 2: $x = $srcinfo [0]-$waterinfo [0]; $y = 0; Break 3 centering Case 3: $x = ($srcinfo [0]-$waterinfo [0])/2; $y = ($srcinfo [1]-$waterinfo [1])/2; Break 4 bottom Left Case 4: $x = 0; $y = $srcinfo [1]-$waterinfo [1]; Break 5 bottom Right Case 5: $x = $srcinfo [0]-$waterinfo [0]; $y = $srcinfo [1]-$waterinfo [1]; Break Default: $x = $y = 0; } Imagecopymerge ($SRCIMGOBJ, $WATERIMGOBJ, $x, $y, 0, 0, $waterinfo [0], $waterinfo [1], $alpha); Switch ($srcinfo [2]) { Case 1:imagegif ($SRCIMGOBJ, $savefile); Break Case 2:imagejpeg ($SRCIMGOBJ, $savefile); Break Case 3:imagepng ($SRCIMGOBJ, $savefile); Break default:return-5; Save failed } Imagedestroy ($SRCIMGOBJ); Imagedestroy ($WATERIMGOBJ); return $savefile; } function Image_create_from_ext ($imgfile) { $info = getimagesize ($imgfile); $im = null; Switch ($info [2]) { Case 1: $im =imagecreatefromgif ($imgfile); Break Case 2: $im =imagecreatefromjpeg ($imgfile); Break Case 3: $im =imagecreatefrompng ($imgfile); Break } return $im; }

Currently supports JPG, GIF, PNG and other image formats.

Examples of usage:

The code is as follows	Copy Code
if ($pic = Watermark ('./image.jpg ', './watermark.png ')) { Echo '; } Else { Echo '; }

The following shows a complete full watermark increment function

The code is as follows

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/************************************************************** 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); Instructions for use: 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; **************************************************************/ 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; The watermark position (1 is the lower left corner, 2 is the lower right corner, 3 is the upper left corner, 4 is the upper right corner, and 5 is centered); $waterstring = "http://www.bKjia.c0m/"; Watermark String $waterimg = "Xplore.gif"; Watermark Picture $imgpreview = 1; Whether to generate a preview map (1 is generated, others are not generated); $imgpreviewsize =1/1; Thumbnail scale ?> Picture Water Printing Program Demo! WWW.MOP8.COM This demo space is provided by Tuwoo, this program adopts the way of text watermark. if ($_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 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, 0,0,0); $red =imagecolorallocate ($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 "echo" alt= "Picture preview: R filename:". $destination. " R upload time: ">"; } } ?>

http://www.bkjia.com/PHPjc/632951.html www.bkjia.com true http://www.bkjia.com/PHPjc/632951.html techarticle in PHP to implement the image to increase the watermark we have to use a lot of functions, imagecreatefromjpeg,imagecreatefrompng,getimagesize and so on, these are the functions of the PHP GD library, so ...

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