如何为百度编辑器添加图片水印功能？前些日子把phpcms的内置编辑器改成了百度ue编辑器，非常好用，但是有个地方不是很满意，就是没法给上传的图片加水印了，经过一番研究终于实现了出来，分享给大家。希望对大家有所帮助。
UEditor编辑器上传图片是自动提取的，但是图片没有水印功能，下面小编和各位一起来看看。
UEditor编辑器没有上传图片加水印的功能，需要进行二次开发，本例是在PHPCMS系统中对百度编辑器进行二次开发，添加上传图片加水印功能。
首先打开UEditor编辑器文件目录的php文件夹，打开Uploader.class.php，把PHPCMS添加水印的方法复制过来，加到这个类所有成员方法最后面，然后进行修改如下：
//图片加水印
public function watermark($source, $target = '', $w_pos = '', $w_img = '', $w_text = '99danji',$w_font = 8, $w_color = '#ff0000') {
$this->w_img = 'watermark.png';
$this->w_pos = 9;
$this->w_minwidth = 400;
$this->w_minheight = 200;
$this->w_quality = 80;
$this->w_pct = 85;
$w_pos = $w_pos ? $w_pos : $this->w_pos;
$w_img = $w_img ? $w_img : $this->w_img;
//if(!$this->watermark_enable || !$this->check($source)) return false;
if(!$target) $target = $source;
//$w_img = PHPCMS_PATH.$w_img;
//define('WWW_PATH', dirname(dirname(dirname(__FILE__)));
$w_img = '../../../images/water/'.$w_img;
$source_info = getimagesize($source);
$source_w = $source_info[0];
$source_h = $source_info[1];
//if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false;
switch($source_info[2]) {
case 1 :
$source_img = imagecreatefromgif($source);
break;
case 2 :
$source_img = imagecreatefromjpeg($source);
break;
case 3 :
$source_img = imagecreatefrompng($source);
break;
default :
return false;
}
if(!empty($w_img) && file_exists($w_img)) {
$ifwaterimage = 1;
$water_info = getimagesize($w_img);
$width = $water_info[0];
$height = $water_info[1];
switch($water_info[2]) {
case 1 :
$water_img = imagecreatefromgif($w_img);
break;
case 2 :
$water_img = imagecreatefromjpeg($w_img);
break;
case 3 :
$water_img = imagecreatefrompng($w_img);
break;
default :
return;
}
} else {
$ifwaterimage = 0;
$temp = imagettfbbox(ceil($w_font*2.5), 0, PC_PATH.'libs/data/font/elephant.ttf', $w_text);
$width = $temp[2] - $temp[6];
$height = $temp[3] - $temp[7];
unset($temp);
}
switch($w_pos) {
case 1:
$wx = 5;
$wy = 5;
break;
case 2:
$wx = ($source_w - $width) / 2;
$wy = 0;
break;
case 3:
$wx = $source_w - $width;
$wy = 0;
break;
case 4:
$wx = 0;
$wy = ($source_h - $height) / 2;
break;
case 5:
$wx = ($source_w - $width) / 2;
$wy = ($source_h - $height) / 2;
break;
case 6:
$wx = $source_w - $width;
$wy = ($source_h - $height) / 2;
break;
case 7:
$wx = 0;
$wy = $source_h - $height;
break;
case 8:
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height;
break;
case 9:
$wx = $source_w - $width;
$wy = $source_h - $height;
break;
case 10:
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
default:
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
}
if($ifwaterimage) {
if($water_info[2] == 3) {
imagecopy($source_img, $water_img, $wx, $wy, 0, 0, $width, $height);
} else {
imagecopymerge($source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct);
}
} else {
if(!empty($w_color) && (strlen($w_color)==7)) {
$r = hexdec(substr($w_color,1,2));
$g = hexdec(substr($w_color,3,2));
$b = hexdec(substr($w_color,5));
} else {
return;
}
imagestring($source_img,$w_font,$wx,$wy,$w_text,imagecolorallocate($source_img,$r,$g,$b));
}
switch($source_info[2]) {
case 1 :
imagegif($source_img, $target);
break;
case 2 :
imagejpeg($source_img, $target, $this->w_quality);
break;
case 3 :
imagepng($source_img, $target);
break;
default :
return;
}
if(isset($water_info)) {
unset($water_info);
}
if(isset($water_img)) {
imagedestroy($water_img);
}
unset($source_info);
imagedestroy($source_img);
return true;
}
public function check($image) {
return extension_loaded('gd') && preg_match("/\.(jpg|jpeg|gif|png)/i", $image, $m) && file_exists($image) && function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $m[1]));
}
对比我修改的部分，由于phpcms水印可以在后台管理设置，phpcms自带的水印方法通过读取配置文件获取路径，和读取数据库设置获取参数设置，那么这些地方需要手动进行设置。
对了，在upFile方法还要添加一段函数：
复制代码 代码如下:
if ($this->watermark) {
$this->watermark($this->filePath,$this->filePath);
}
然后打开UEditor百度编辑器php目录下的action_upload.php文件，加上是否添加水印的参数：
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/* 上传配置 */
$base64 = "upload";
switch (htmlspecialchars($_GET['action'])) {
case 'uploadimage':
$config = array(
"pathFormat" => $CONFIG['imagePathFormat'],
"maxSize" => $CONFIG['imageMaxSize'],
"allowFiles" => $CONFIG['imageAllowFiles']
);
$fieldName = $CONFIG['imageFieldName'];
$watermark = true;
break;
然后在后面还有一句要改成：
/* 生成上传实例对象并完成上传 */ $up = new Uploader($fieldName, $config, $base64, $watermark);
这样就大功告成了，本文主要是提供思路和参考。
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