php给图片增加中文水印
增加中文水印
/*-------------------------------------------------------------
**描述:这是用于给指定图片加底部水印(不占用图片显示区域)的自定义类,需创建对象调用
**版本:v1.0
**创建:2007-10-09
**更新:2007-10-09
**人员:老肥牛([email]fatkenme@163.com[/email] QQ:70177108)
**说明:1、需要gd库支持,需要iconv支持(php5已经包含不用加载)
2、只适合三种类型的图片,jpg/jpeg/gif/png,其它类型不处理
3、注意图片所在目录的属性必须可写
4、调用范例:
$objImg = new MyWaterDownChinese();
$objImg->Path = "images/";
$objImg->FileName = "1.jpg";
$objImg->Text = "胖胖交友网 [url]www.ppfriend.com[/url]";
$objImg->Font = "./font/simhei.ttf";
$objImg->Run();
**成员函数:
----------------------------------------------------------------*/
class MyWaterDownChinese{
var $Path = "./"; //图片所在目录相对于调用此类的页面的相对路径
var $FileName = ""; //图片的名字,如“1.jpg”
var $Text = ""; //图片要加上的水印文字,支持中文
var $TextColor = "#ffffff"; //文字的颜色,gif图片时,字体颜色只能为黑色
var $TextBgColor = "#000000"; //文字的背景条的颜色
var $Font = "c://windows//fonts//simhei.ttf"; //字体的存放目录,相对路径
var $OverFlag = true; //是否要覆盖原图,默认为覆盖,不覆盖时,自动在原图文件名后+"_water_down",如“1.jpg”=> "1_water_down.jpg"
var $BaseWidth = 200; //图片的宽度至少要>=200,才会加上水印文字。
//------------------------------------------------------------------
//功能:类的构造函数(php5.0以上的形式)
//参数:无
//返回:无
function __construct(){;}
//------------------------------------------------------------------
//功能:类的析构函数(php5.0以上的形式)
//参数:无
//返回:无
function __destruct(){;}
//------------------------------------------------------------------
//------------------------------------
//功能:对象运行函数,给图片加上水印
//参数:无
//返回:无
function Run()
{
if($this->FileName == "" || $this->Text == "")
return;
//检测是否安装GD库
if(false == function_exists("gd_info"))
{
echo "系统没有安装GD库,不能给图片加水印.";
return;
}
//设置输入、输出图片路径名
$arr_in_name = explode(".",$this->FileName);
//
$inImg = $this->Path.$this->FileName;
$outImg = $inImg;
$tmpImg = $this->Path.$arr_in_name[0]."_tmp.".$arr_in_name[1]; //临时处理的图片,很重要
if(!$this->OverFlag)
$outImg = $this->Path.$arr_in_name[0]."_water_down.".$arr_in_name[1];
//检测图片是否存在
if(!file_exists($inImg))
return ;
//获得图片的属性
$groundImageType = @getimagesize($inImg);
$imgWidth = $groundImageType[0];
$imgHeight = $groundImageType[1];
$imgType = $groundImageType[2];
if($imgWidth BaseWidth) //小于基本宽度,不处理
return;
//图片不是jpg/jpeg/gif/png时,不处理
switch($imgType)
{
case 1:
$image = imagecreatefromgif($inImg);
$this->TextBgColor = "#ffffff"; //gif图片字体只能为黑,所以背景颜色就设置为白色
break;
case 2:
$image = imagecreatefromjpeg($inImg);
break;
case 3:
$image = imagecreatefrompng($inImg);
break;
default:
return;
break;
}
//创建颜色
$color = @imagecolorallocate($image,hexdec(substr($this->TextColor,1,2)),hexdec(substr($this->TextColor,3,2)),hexdec(substr($this->TextColor,5,2))); //文字颜色
//生成一个空的图片,它的高度在底部增加水印高度
$newHeight = $imgHeight+20;
$objTmpImg = @imagecreatetruecolor($imgWidth,$newHeight);
$colorBg = @imagecolorallocate($objTmpImg,hexdec(substr($this->TextBgColor,1,2)),hexdec(substr($this->TextBgColor,3,2)),hexdec(substr($this->TextBgColor,5,2))); //背景颜色
//填充图片的背景颜色
@imagefill ($objTmpImg,0,0,$colorBg);
//把原图copy到临时图片中
@imagecopy($objTmpImg,$image,0,0,0,0,$imgWidth,$imgHeight);
//创建要写入的水印文字对象
$objText = $this->createText($this->Text);
//计算要写入的水印文字的位置
$x = 5;
$y = $newHeight-5;
//写入文字水印
@imagettftext($objTmpImg,10,0,$x,$y,$color,$this->Font,$objText);
//生成新的图片,临时图片
switch($imgType)
{
case 1:
imagegif($objTmpImg,$tmpImg);
break;
case 2:
imagejpeg($objTmpImg,$tmpImg);
break;
case 3:
imagepng($objTmpImg,$tmpImg);
break;
default:
return;
break;
}
//释放资源
@imagedestroy($objTmpImg);
@imagedestroy($image);
//重新命名文件
if($this->OverFlag)
{
//覆盖原图
@unlink($inImg);
@rename($tmpImg,$outImg);
}
else
{
//不覆盖原图
@rename($tmpImg,$outImg);
}
}
//--------------------------------------
//功能:创建水印文字对象
//参数:无
//返回:创建的水印文字对象
function createText($instring)
{
$outstring="";
$max=strlen($instring);
for($i=0;$i {
$h=ord($instring[$i]);
if($h>=160 && $i {
$outstring .= "".base_convert(bin2hex(iconv("gb2312","ucs-2",substr($instring,$i,2))),16,10).";";
$i++;
}
else
{
$outstring .= $instring[$i];
}
}
return $outstring;
}
}//class
?>

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