PHP Picture Add Watermark Function Sample Summary _php tips

The example of this article summarizes the PHP image add watermark function. Share to everyone for your reference, specific as follows:

Example 1, very simple to add a watermark function under the diagram

<?php
/**
 * Append Watermark
 * *
 @param string $source _img original picture url
 * @param string $water _map watermark Picture URL
 * *
function Addwatermap ($source _img, $water _map)
{
  $img = imagecreatefromjpeg ($source _img);//Read the original
  $img _x = Imagesx ($img);//original width
  $img _y = Imagesy ($img); /Original High
  imagealphablending ($img, true);//set to mixed fill mode
  //$img _water_map = Imagecreatefromjpeg ($water _map); Read watermark picture
  $img _water_map = imagecreatefrompng ($water _map);
  $water _x = imagesx ($img _water_map); Watermark width
  $water _y = Imagesy ($img _water_map);//Watermark high
  $wimg _x = $img _x-$water _x-10;//watermark x coordinates
  $wimg _y = $img _y -$water _y-10;
  Watermark Picture Horizontal start point, watermark Picture longitudinal axis start point, watermark horizontal end, watermark longitudinal axis end
  imagejpeg ($img, $source _img, 95);//output to target file
  Imagedestroy ($img); Destroy memory data stream
  Imagedestroy ($img _water_map);//Destroy Memory stream return
  true;
>

Example 2, a more complete picture to increase the watermark class

<?php/** * Image watermark (for png/jpg/gif format) * * @author FLYNETCN * * * @param $srcImg Original picture * @param $waterImg watermark Picture * @par AM $savepath Save path * @param $savename save name * @param $positon Watermark Location * 1: Top left, 2: Top right, 3: center, 4: Bottom left, 5: bottom Right * @p       Aram $alpha Transparency-0: completely transparent, 100: completely opaque * * @return Success-Add watermark to the new picture address * failed---1: The original file does not exist,-2: Watermark picture does not exist,-3: Original file image Object build failed * -4: Watermark file Image Object Establishment failure-5: New image Save after Watermark failed/function Img_water_mark ($SRCIMG, $WATERIMG, $savepath =null, $savename =null, $pos
 Iton=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;//original file image object builtFailure} $WATERIMGOBJ = Image_create_from_ext ($WATERIMG);
 if (! $waterImgObj) {return-4;//Watermark file Image object build failed} switch ($positon) {//1 top left Case 1: $x = $y =0; 2 top Right Case 2: $x = $srcinfo [0]-$waterinfo [0]; $y = 0;
 Break 3 Center 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, $savefile); Case 2:imagejpeg ($SRCIMGOBJ, $savefile);
 Break Case 3:imagepng ($SRCIMGOBJ, $savefile);
 Break default:return-5;
 Save failed} Imagedestroy ($SRCIMGOBJ);
 Imagedestroy ($WATERIMGOBJ);
return $savefile;
 The function Image_create_from_ext ($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;

 }

For more information on PHP related content readers can view the site topics: "PHP graphics and pictures Operating skills summary", "Basic PHP Grammar Introductory Course", "PHP Operations and Operator Usage Summary", "PHP object-oriented Program Design Introductory Course", "PHP Network Programming Skills Summary", "PHP array (Array) Operations tips Encyclopedia, "PHP string (String) Usage Summary", "Php+mysql Database operation Introduction Tutorial" and "PHP Common database Operation tips Summary"

I hope this article will help you with the PHP program design.