后端开发|php教程
百度UE编辑器,添加水印
后端开发-php教程
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。
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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。
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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：
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//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.jpg; $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 w_minwidth || $source_h w_minheight) return false; switch($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 : $m[1]));}
对比我修改的部分，由于phpcms水印可以在后台管理设置，phpcms自带的水印方法通过读取配置文件获取路径，和读取数据库设置获取参数设置，那么这些地方需要手动进行设置。
对了，在upFile方法还要添加一段函数：
if ($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 = 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。
以上所述就是本文的全部内容了，希望大家能够喜欢，能够对大家使用ue编辑器有所帮助。
