PHP image Processing

Synthetic picture (watermark) function Img_water_mark ($SRCIMG, $WATERIMG, $savename, $savepath = ' Public/images/wxqrcode ', $positon = 3, $ ALPHA=100) {//$savename =time ().    JPG ';      $temp = PathInfo ($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 (! $waterImgObj) {return-4;      Watermark file Image object failed to build} switch ($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 $savefile;      }//Create Picture function Image_create_from_ext ($imgfile) {$info = getimagesize ($imgfile);      $im = null;      Switch ($info [2]) {Case 1: $im =imagecreatefromgif ($imgfile); Case 2: $im =imagecreatefromjpeg ($imgfile);      Break Case 3: $im =imagecreatefromPNG ($imgfile);      Break  } return $im; }//Create Size function ImageSize ($pathimg) {//Picture equal to zoom//because PHP can only operate on resources, so copy the picture that needs to be scaled, create it as a new resource $src =IMAGECREATEFR        Omjpeg ($PATHIMG);    Get the width and height of the source image $size _src=getimagesize ($pathimg);    $w = $size _src[' 0 '];        $h = $size _src[' 1 '];        Specifies the maximum width (and possibly height) of the scale $max = 150;        Depending on the maximum value of 300, the length of the other edge is calculated, and the image width and height are scaled if ($w > $h) {$w = $max;    $h = $h * ($max/$size _src[' 0 ']);        }else{$h = $max;    $w = $w * ($max/$size _src[' 1 ']);            }//Declare a $w-wide, $h-high true Color picture resource $image =imagecreatetruecolor ($w, $h); Key functions, parameters (target resource, source, target resource start coordinate x, Y, source resource start coordinates x, Y, target resource width high w,h, source resource's width high w,h) imagecopyresampled ($image, $src, 0, 0, 0, 0, $w, $h, $        size_src[' 0 '], $size _src[' 1 ']);   Tell the browser to parse//header (' content-type:image/png ') in image format;   Imagepng ($image);   $timestamp = time ();         Imagejpeg ($image, "$timestamp. jpg"); Destruction of resources Imagedestroy ($image); return $timestamp.    JPG '; }

PHP image Processing