求 php 图片加水印的一个类。Gimage.php

//$sourFile 图片文件名  $sourFile 图片文件名  返回: 1 成功成功时返回生成的图片路径
getInfo()  得到图片的信息
function waterMark($sourFile, $text)
{
$sourFile = $this->sourcePath . $sourFile;
$imageInfo = $this->getInfo($sourFile);
$newName = substr($imageInfo["name"], 0, strrpos($imageInfo["name"], ".")) . "_.jpg";
switch ($imageInfo["type"])
{
case 1: //gif
$img = imagecreatefromgif($sourFile);
break;
case 2: //jpg
$img = imagecreatefromjpeg($sourFile);
break;
case 3: //png
$img = imagecreatefrompng($sourFile);
break;
default:
return 0;
break;
}
if (!$img)
return 0; $width  = ($this->maxWidth > $imageInfo["width"]) ? $imageInfo["width"] : $this->maxWidth;
$height = ($this->maxHeight > $imageInfo["height"]) ? $imageInfo["height"] : $this->maxHeight;
$srcW = $imageInfo["width"];
$srcH = $imageInfo["height"];
if ($srcW * $width > $srcH * $height)
$height = round($srcH * $width / $srcW);
else
$width = round($srcW * $height / $srcH);
//*
if (function_exists("imagecreatetruecolor")) //GD2.0.1
{
$new = imagecreatetruecolor($width, $height);
ImageCopyResampled($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo["width"], $imageInfo["height"]);
}
else
{
$new = imagecreate($width, $height);
ImageCopyResized($new, $img, 0, 0, 0, 0, $width, $height, $imageInfo["width"], $imageInfo["height"]);
}
$white = imageColorAllocate($new, 255, 255, 255);
$black = imageColorAllocate($new, 0, 0, 0);
$alpha = imageColorAllocateAlpha($new, 230, 230, 230, 40);
//$rectW = max(strlen($text[0]),strlen($text[1]))*7;
ImageFilledRectangle($new, 0, $height-26, $width, $height, $alpha);
ImageFilledRectangle($new, 13, $height-20, 15, $height-7, $black);
ImageTTFText($new, 4.9, 0, 20, $height-14, $black, $this->fontName, $text[0]);
ImageTTFText($new, 4.9, 0, 20, $height-6, $black, $this->fontName, $text[1]);
//*/
        if ($this->toFile)
{
if (file_exists($this->galleryPath . $newName))
unlink($this->galleryPath . $newName);
ImageJPEG($new, $this->galleryPath . $newName);
ImageDestroy($new);
ImageDestroy($img); return $this->galleryPath . $newName;
}
else
{
ImageJPEG($new);
ImageDestroy($new);
ImageDestroy($img);
} }
  用到的是GD库  函数，你试试吧
<?php
Class Gimage{
var $src_image_name = "";           //输入图片的文件名(必须包含路径名)
var $jpeg_quality = 60;             //jpeg图片质量
var $save_file = "";                //输出文件名
var $dstW = 1024;                   //图片输出最大宽度
var $fsize = 307200;                //图片输出最大字节数
var $wm_image_name = "";            //水印图片的文件名(必须包含路径名)
var $wm_image_pos = 3;              //水印图片放置的位置
// 0 = middle
// 1 = top left
// 2 = top right
// 3 = bottom right
// 4 = bottom left
// 5 = top middle
// 6 = middle right
// 7 = bottom middle
// 8 = middle left
//other = 3
var $wm_image_transition = 80;            //水印图片与原图片的融合度 (1=100)
var $gburl = "./";                        //简体中文件码文件路径
var $wm_text = "";                        //水印文字(支持中英文以及带有\r\n的跨行文字)
var $wm_text_size = 20;                   //水印文字大小
var $wm_text_angle = 5;                   //水印文字角度,这个值尽量不要更改
var $wm_text_pos = 3;                     //水印文字放置位置
var $wm_text_font = "";                   //水印文字的字体
var $wm_text_color = "#cccccc";           //水印字体的颜色值

function create($filename="")
{
   if ($filename) {
   $this->src_image_name = strtolower(trim($filename));
   }

   $src_image_type = $this->get_type($this->src_image_name);
   $src_image = $this->createImage($src_image_type,$this->src_image_name);
   if (!$src_image) return;
   $src_image_w=ImageSX($src_image);
   $src_image_h=ImageSY($src_image);

   if ($this->wm_image_name){
      $this->wm_image_name = strtolower(trim($this->wm_image_name));
      $wm_image_type = $this->get_type($this->wm_image_name);
      $wm_image = $this->createImage($wm_image_type,$this->wm_image_name);
      $wm_image_w=ImageSX($wm_image);
      $wm_image_h=ImageSY($wm_image);
      $temp_wm_image = $this->getPos($src_image_w,$src_image_h,$this->wm_image_pos,$wm_image);
      $wm_image_x = $temp_wm_image["dest_x"];
      $wm_image_y = $temp_wm_image["dest_y"];
      imagecopymerge($src_image, $wm_image,$wm_image_x,$wm_image_y,0,0,$wm_image_w,$wm_image_h,$this->wm_image_transition);
   }

   if ($this->wm_text){
      $this->wm_text = $this->gb2utf8($this->wm_text);
      $temp_wm_text = $this->getPos($src_image_w,$src_image_h,$this->wm_text_pos);
      $wm_text_x = $temp_wm_text["dest_x"];
      $wm_text_y = $temp_wm_text["dest_y"];
     if(preg_match("/([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])([a-f0-9][a-f0-9])/i", $this->wm_text_color, $color))
     {
     $red = hexdec($color[1]);
     $green = hexdec($color[2]);
     $blue = hexdec($color[3]);
     $wm_text_color = imagecolorallocate($src_image, $red,$green,$blue);
     }else{
     $wm_text_color = imagecolorallocate($src_image, 255,255,255);
     }

      imagettftext($src_image, $this->wm_text_size, $this->wm_text_angle, $wm_text_x, $wm_text_y, $wm_text_color,$this->wm_text_font, $this->wm_text);
   }

   //调整大小或者尺寸
   if($this->dstW){
    $flag = 0;
    $size = getimagesize($filename);

    if($size[0] > $this->dstW){//图片尺寸大于限定尺寸
     $flag = 1;
     $dstH = $this->dstW/$size[0]*$size[1];
    }else if($this->fsize < filesize($filename)){//图片大小大于限定大小
     $flag = 1;
     $this->dstW = $size[0];
     $dstH = $size[1];
    }
    if($flag){
     $dst_image = imagecreatetruecolor($this->dstW, $dstH);
     imagecopyresized($dst_image, $src_image, 0, 0, 0, 0, $this->dstW, $dstH, $size[0], $size[1]);
     $src_image = $dst_image;
     unset($dst_image);
    }
   }

   if ($this->save_file)
   {
    switch ($this->get_type($this->save_file)){
     case 'gif':$src_img=ImagePNG($src_image, $this->save_file); break;
     case 'jpeg':$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
     case 'png':$src_img=ImagePNG($src_image, $this->save_file); break;
     default:$src_img=ImageJPEG($src_image, $this->save_file, $this->jpeg_quality); break;
    }
   }
   else
   {
   if ($src_image_type = "jpg") $src_image_type="jpeg";
    header("Content-type: image/{$src_image_type}");
    switch ($src_image_type){
     case 'gif':$src_img=ImagePNG($src_image); break;
     case 'jpg':$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;
     case 'png':$src_img=ImagePNG($src_image);break;
     default:$src_img=ImageJPEG($src_image, "", $this->jpeg_quality);break;
    }
   }
   imagedestroy($src_image);
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
/*
createImage     根据文件名和类型创建图片
内部函数

$type:                图片的类型，包括gif,jpg,png
$img_name: 图片文件名，包括路径名，例如 " ./mouse.jpg"
*/
function createImage($type,$img_name){
    if (!$type){
      $type = $this->get_type($img_name);
    }

     switch ($type){
       case 'gif':
        if (function_exists('imagecreatefromgif'))
           $tmp_img=@ImageCreateFromGIF($img_name);
        break;
       case 'jpg':
        $tmp_img=ImageCreateFromJPEG($img_name);
        break;
       case 'png':
        $tmp_img=ImageCreateFromPNG($img_name);
        break;
       default:
        $tmp_img=ImageCreateFromString($img_name);
        break;
     }
     return $tmp_img;
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
getPos               根据源图像的长、宽，位置代码，水印图片id来生成把水印放置到源图像中的位置
内部函数

$sourcefile_width:        源图像的宽
$sourcefile_height: 原图像的高
$pos:               位置代码
// 0 = middle
// 1 = top left
// 2 = top right
// 3 = bottom right
// 4 = bottom left
// 5 = top middle
// 6 = middle right
// 7 = bottom middle
// 8 = middle left
$wm_image:           水印图片ID
*/
function getPos($sourcefile_width,$sourcefile_height,$pos,$wm_image=""){
    if ($wm_image){
      $insertfile_width = ImageSx($wm_image);
      $insertfile_height = ImageSy($wm_image);
    }else {
      $lineCount = explode("\r\n",$this->wm_text);
      $fontSize = imagettfbbox($this->wm_text_size,$this->wm_text_angle,$this->wm_text_font,$this->wm_text);
      $insertfile_width = $fontSize[2] - $fontSize[0];
      $insertfile_height = count($lineCount)*($fontSize[1] - $fontSize[3]);
    }

    switch ($pos){
      case 0:
        $dest_x = ( $sourcefile_width / 2 ) - ( $insertfile_width / 2 );
        $dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
        break;

      case 1:
        $dest_x = 0;
        if ($this->wm_text){
         $dest_y = $insertfile_height;
        }else{
         $dest_y = 0;
        }
        break;

      case 2:
       $dest_x = $sourcefile_width - $insertfile_width;
       if ($this->wm_text){
       $dest_y = $insertfile_height;
       }else{
        $dest_y = 0;
       }
       break;

      case 3:
       $dest_x = $sourcefile_width - $insertfile_width;
       $dest_y = $sourcefile_height - $insertfile_height;
       break;

      case 4:
       $dest_x = 0;
       $dest_y = $sourcefile_height - $insertfile_height;
       break;

      case 5:
      $dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );
      if ($this->wm_text){
       $dest_y = $insertfile_height;
      }else{
       $dest_y = 0;
      }
      break;

      case 6:
      $dest_x = $sourcefile_width - $insertfile_width;
      $dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
      break;

      case 7:
      $dest_x = ( ( $sourcefile_width - $insertfile_width ) / 2 );
      $dest_y = $sourcefile_height - $insertfile_height;
      break;

      case 8:
      $dest_x = 0;
      $dest_y = ( $sourcefile_height / 2 ) - ( $insertfile_height / 2 );
      break;

      default:
       $dest_x = $sourcefile_width - $insertfile_width;
       $dest_y = $sourcefile_height - $insertfile_height;
       break;
    }
    return array("dest_x"=>$dest_x,"dest_y"=>$dest_y);
}

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
gb2utf8                指定的文字转换为UTF-8格式，包括中英文混合
内部函数
*/
function gb2utf8($gb)
{
    if(!trim($gb))
      return $gb;
    $filename = $this->gburl."gb2312.txt";
    $tmp=file($filename);
    $codetable=array();
    while(list($key,$value)=each($tmp))
    $codetable[hexdec(substr($value,0,6))]=substr($value,7,6);

    $utf8="";
    while($gb)
    {
      if (ord(substr($gb,0,1))>127)
      {
        $tthis=substr($gb,0,2);
        $gb=substr($gb,2,strlen($gb)-2);
        $utf8.=$this->u2utf8(hexdec($codetable[hexdec(bin2hex($tthis))-0x8080]));
      }
      else
      {
        $tthis=substr($gb,0,1);
        $gb=substr($gb,1,strlen($gb)-1);
        $utf8.=$this->u2utf8($tthis);
      }
    }

return $utf8;
}

function u2utf8($c)
{
    $str="";
    if ($c < 0x80)
    {
      $str.=$c;
    }
    else if ($c < 0x800)
    {
      $str.=chr(0xC0 | $c>>6);
      $str.=chr(0x80 | $c & 0x3F);
    }
    else if ($c < 0x10000)
    {
      $str.=chr(0xE0 | $c>>12);
      $str.=chr(0x80 | $c>>6 & 0x3F);
      $str.=chr(0x80 | $c & 0x3F);
    }
    else if ($c < 0x200000)
    {
      $str.=chr(0xF0 | $c>>18);
      $str.=chr(0x80 | $c>>12 & 0x3F);
      $str.=chr(0x80 | $c>>6 & 0x3F);
      $str.=chr(0x80 | $c & 0x3F);
    }
return $str;
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
get_type                获得图片的格式，包括jpg,png,gif
内部函数

$img_name：        图片文件名，可以包括路径名
*/
function get_type($img_name)//获取图像文件类型
{
   $name_array = explode(".",$img_name);
   if (preg_match("/\.(jpg|jpeg|gif|png)$/", $img_name, $matches))
   {
    $type = strtolower($matches[1]);
   }
   else
   {
    $type = "string";
   }
   return $type;
}

}
?>

调试易

求 php 图片加水印的一个类。Gimage.php

解决方案 »