UEDITOR编辑器上传图片是自动提取的，但是图片没有水印功能，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：

将
public function __construct($fileField, $config, $type = "upload")
改为
public function __construct($fileField, $config, $type = "upload", $watermark)//加水印
在 $this->type = $type; 下加上 $this->watermark = $watermark;

添加方法

//图片加水印
public function watermark($source, $target = '', $w_pos = '', $w_img = '', $w_text = 'floverow',$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：

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：

/* 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 = $CONFIG['watermark'];
        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);

别忘了在config.json中加上
"watermark": true,

这样就大功告成了，本文主要是提供思路和参考。