PHP Image Watermark-Add text as a watermark to the picture

Source: Internet
Author: User
Tags save file

Method Code:

/** * image watermark (for png/jpg/gif format) * * @author FLYNETCN * * @param $srcImg Original picture * @param $waterWord water Print text * @param $savepath save path * @param $savename save name * @param $positon Watermark Position * 1: Top left, angle-30 degrees; 2: Centered,     Angle 30 degrees; 3: Center, angle-30 degrees; 4: Bottom left, angle 30 degrees; * @param $size Font Size * @param $alpha Transparency--0: Fully transparent, 100: completely opaque * * @return Success-Watermark New image address * failed---1: Original File does not exist,-2: Watermark picture does not exist,-3: Original file image Object build failed *-4: Watermark file Image object failed to build-5: New image after Watermark failed to save*/    functionWater_mark ($srcImg,$waterWord,$savepath=NULL,$savename=NULL,$positon=3,$size=74,$color=NULL,$alpha=50){        //determine if a file exists        $srcImgInfo= @getimagesize($srcImg); if(!$srcImgInfo){            return-1; }        //Creating an Image object        $SRCIMGOBJ= Image_create_from_ext ($srcImg,$srcImgInfo[2]); if(!$SRCIMGOBJ){            return-3;//The original file image object failed to build        }        //Preparation Information: Save path, save file name        $temp=PathInfo($srcImg); $name=$temp[' basename ']; $path=$temp[' DirName ']; $ext=$temp[' extension ']; $color=$color?$color: Imagecolorallocate ($SRCIMGOBJ, 255,250,250); $savename=$savename?$savename:$name; $savepath=$savepath?$savepath:$path; $savefile=$savepath.‘ /‘.$savename; //Create a canvas and fill it with color, otherwise the background is black        $imgW= 500; $imgH=$srcImgInfo[1]/($srcImgInfo[0]/500); $IMGOBJ= Imagecreatetruecolor ($imgW,$imgH); $trans= Imagecolorallocate ($IMGOBJ, 255, 255, 255); Imagefill ($IMGOBJ, 0, 0,$trans); //Zoom out the picture to the canvasImagecopyresampled ($IMGOBJ,$SRCIMGOBJ, 0, 0, 0, 0,$imgW,$imgH,$srcImgInfo[0],$srcImgInfo[1]); //determine where the watermark is generated        Switch($positon){            //1 top left, angle-20 degrees             Case1:$x=$y= 20;$angle=-20;  Break; //2 Center, Angle-20 degrees             Case2:$x=$imgW/7;$y=$imgH/3;$angle=-20;  Break; //3 Center, angle 20 degrees             Case3:$x=$imgW/7;$y=$imgH/1.5;$angle= 20;  Break; //4 bottom left, angle 20 degrees             Case4:$x= 20;$y=$imgH;$angle= 20;  Break; default:$x=$imgW/7;$y=$imgH/2;$angle= 20;  Break; }        //Add a watermark pictureImagettftext ($IMGOBJ,$size,$angle,$x,$y,$color, './fonts/stxinwei. TTF ',$waterWord); //Output Picture        Switch($srcImgInfo[2]) {             Case1:Imagegif ($IMGOBJ,$savefile);  Break;  Case2:imagejpeg ($IMGOBJ,$savefile);  Break;  Case3:Imagepng ($IMGOBJ,$savefile);  Break; default:return-5;//Save failed        }        //Destroying image ResourcesImagedestroy ($IMGOBJ); Imagedestroy ($SRCIMGOBJ); return $savefile; }    /** Create Image Object * @param $imgFile picture path * @param $imgExt picture extension * @return $im Image Object **/    functionImage_create_from_ext ($imgFile,$imgExt){        $im=NULL; Switch($imgExt) {             Case1:$im=imagecreatefromgif ($imgFile);  Break;  Case2:$im=imagecreatefromjpeg ($imgFile);  Break;  Case3:$im=imagecreatefrompng ($imgFile);  Break; }        return $im; }

Test:

// Call method Test $res null, ' res.jpg ', 3, (); Var_dump ($res);

PHP Image Watermark-Add text as a watermark to the picture

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.