常用的php图片处理类（水印、等比缩放、固定高宽）分享

<"_".$height.".".$this->typeList[$this->source_type_id]; 
    if($this->saveImage($tinyImage,$newPic)){ 
      imagedestroy($tinyImage); 
      imagedestroy($handle); 
    } 
  } 
  //保存图片 
  private function saveImage($image,$url){ 
    if(imagejpeg($image,$url)){ 
      return true; 
    } 
  } 
} 
$imgHandle = new Image_process('D:\AppServ\www\test\getimg\14061907445601.jpg'); 
//$imgHandle->waterMakeImage('D:\AppServ\www\test\getimg\shougongke.png');  //生成水印图片 
//$imgHandle->fixSizeImage(200,150); //固定长度图片 
$imgHandle->scaleImage(0.2); //等比例缩放 
"htmlcode">

<"imagecopyresampled" ))
  {
  $newim = imagecreatetruecolor ( $newwidth, $newheight );
  imagecopyresampled ( $newim, $source, 0, 0, 0, 0, $newwidth, $newheight, $src_w, $src_h );
  } else
  {
  $newim = imagecreate ( $newwidth, $newheight );
  imagecopyresized ( $newim, $source, 0, 0, 0, 0, $newwidth, $newheight, $src_w, $src_h );
  }
 }
 //输出(保存)图片
 if (! empty ( $save_img ))
 {

  $org_funcs ['save_func'] ( $newim, $save_img );
 } else
 {
  header ( $org_funcs ['header'] );
  $org_funcs ['save_func'] ( $newim );
 }
 imagedestroy ( $newim );
 return array ('flag' => True, 'msg' => '' );
 }

 /**
 * 
 * 生成水印图片
 * @param $org_img 原图像
 * @param $mark_img 水印标记图像
 * @param $save_img 当其目录不存在时，会试着创建目录
 * @param array $option 为水印的一些基本设置包含：
 * x:水印的水平位置,默认为减去水印图宽度后的值
 * y:水印的垂直位置,默认为减去水印图高度后的值
 * alpha:alpha值(控制透明度),默认为50
 */
 public function water_mark($org_img, $mark_img, $save_img = '', $option = array())
 {
 //检查图片
 $org_ext = $this->is_img ( $org_img );
 if (! $org_ext ['flag'])
 {
  return $org_ext;
 }
 $mark_ext = $this->is_img ( $mark_img );
 if (! $mark_ext ['flag'])
 {
  return $mark_ext;
 }
 //如果有保存路径，则确定路径是否正确
 if (! empty ( $save_img ))
 {
  $f = $this->check_dir ( $save_img );
  if (! $f ['flag'])
  {
  return $f;
  }
 }

 //获取相应画布
 $org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );
 $org_img_im = $org_funcs ['create_func'] ( $org_img );

 $mark_funcs = $this->get_img_funcs ( $mark_ext ['msg'] );
 $mark_img_im = $mark_funcs ['create_func'] ( $mark_img );

 //拷贝水印图片坐标
 $mark_img_im_x = 0;
 $mark_img_im_y = 0;
 //拷贝水印图片高宽
 $mark_img_w = imagesx ( $mark_img_im );
 $mark_img_h = imagesy ( $mark_img_im );

 $org_img_w = imagesx ( $org_img_im );
 $org_img_h = imagesx ( $org_img_im );

 //合成生成点坐标
 $x = $org_img_w - $mark_img_w;
 $org_img_im_x = isset ( $option ['x'] ) "加载图片 $img_path 失败！" );
 }
 $ext = explode ( '.', $img_path );
 $ext = strtolower ( end ( $ext ) );
 if (! in_array ( $ext, $this->exts ))
 {
  return array ('flag' => False, 'msg' => "图片 $img_path 格式不正确！" );
 }
 return array ('flag' => True, 'msg' => $ext );
 }

 /**
 * 
 * 返回正确的图片函数
 * @param unknown_type $ext
 */
 private function get_img_funcs($ext)
 {
 //选择
 switch ($ext)
 {
  case 'jpg' :
  $header = 'Content-Type:image/jpeg';
  $createfunc = 'imagecreatefromjpeg';
  $savefunc = 'imagejpeg';
  break;
  case 'jpeg' :
  $header = 'Content-Type:image/jpeg';
  $createfunc = 'imagecreatefromjpeg';
  $savefunc = 'imagejpeg';
  break;
  case 'gif' :
  $header = 'Content-Type:image/gif';
  $createfunc = 'imagecreatefromgif';
  $savefunc = 'imagegif';
  break;
  case 'bmp' :
  $header = 'Content-Type:image/bmp';
  $createfunc = 'imagecreatefrombmp';
  $savefunc = 'imagebmp';
  break;
  default :
  $header = 'Content-Type:image/png';
  $createfunc = 'imagecreatefrompng';
  $savefunc = 'imagepng';
 }
 return array ('save_func' => $savefunc, 'create_func' => $createfunc, 'header' => $header );
 }

 /**
 * 
 * 检查并试着创建目录
 * @param $save_img
 */
 private function check_dir($save_img)
 {
 $dir = dirname ( $save_img );
 if (! is_dir ( $dir ))
 {
  if (! mkdir ( $dir, 0777, true ))
  {
  return array ('flag' => False, 'msg' => "图片保存目录 $dir 无法创建！" );
  }
 }
 return array ('flag' => True, 'msg' => '' );
 }
}

if (! empty ( $_FILES ['test'] ['tmp_name'] ))
{
 //例子
 $img = new Img ();
 //原图
 $name = explode ( '.', $_FILES ['test'] ['name'] );
 $org_img = 'D:/test.' . end ( $name );
 move_uploaded_file ( $_FILES ['test'] ['tmp_name'], $org_img );
 $option = array ('width' => $_POST ['width'], 'height' => $_POST ['height'] );
 if ($_POST ['type'] == 1)
 {
 $s = $img->resize_image ( $org_img, '', $option );
 } else
 {
 $img->thumb_img ( $org_img, '', $option );
 }
 unlink ( $org_img );
}



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