完成显示水印功能；

app/common/tools/PostShow.php

@@ -8,7 +8,6 @@ class PostShow
 {
     public static function handleCopyright($content)
     {
-
         // 防采集版权声明,被采集了会在其他网站显示
         // 可以被选中复制，可以被采集，在网页中不会显示，但是在别的网站中可以显示
         $content_copyright = '<blockquote class="post-content-inner-copyright"> 版权声明：' . get_system_config('post_copyright') . '</blockquote>';
@@ -27,13 +26,10 @@ class PostShow
         $p_list = $dom_content->children('p');
 
         foreach ($p_list as $index_p => $dom_p) {
-
             if ($index_p != 0 && $index_p % 8 == 0) {
-
                 // $dom_copyright->clone()->children()->insertAfter($dom_p);
             }
             if ($index_p != 0 && $index_p % 6 == 0) {
-
                 $dom_copyright_hide->clone()->children()->insertAfter($dom_p);
             }
         }
@@ -42,4 +38,27 @@ class PostShow
 
         return $content;
     }
+
+    public static function handleImage($content)
+    {
+        $dom_content = phpQuery::newDocumentHTML($content);
+
+        $img_list = $dom_content->find('img');
+
+        foreach ($img_list as $index_img => $dom_img) {
+            $dom_img = pq($dom_img);
+
+            $src = $dom_img->attr('src');
+
+            $src = get_source_link($src);
+
+            $watermarked_file_save_name = Image::handelWatermarkSave($src);
+
+            $dom_img->attr('src', $watermarked_file_save_name);
+        }
+
+        $content = $dom_content->html();
+
+        return $content;
+    }
 }