Merge pull request '过滤emoj' (#55) from wpd_emoj into master

Reviewed-on: #55

model/mSpider.php

@@ -293,7 +293,7 @@ class mSpider extends mBase {
             $created_at = new DateTime($da['created_at']); // 解析时间
             $weibo = array(
                 'mblogid' => $da['mblogid'],
-                'text' => $da['text_raw'],
+                'text' => $this->remove4ByteChars($da['text_raw']),
                 'refer' => '',
                 'pic_ids' => $da['pic_num'] > 0 ? json_encode($da['pic_ids']) : '',
                 'video_url' => isset($da['page_info']['media_info']['stream_url']) ? $da['page_info']['media_info']['stream_url'] : '',
@@ -330,4 +330,8 @@ class mSpider extends mBase {
 
         return true;
     }
+
+    private function remove4ByteChars($str) {
+        return preg_replace('/[\xF0-\xF7][\x80-\xBF]{3}/', '', $str);
+    }
 }