Micro-Letter Development PHP database query, reply to information, unable to obtain data? Or is it in a wrong format?

The process is like this

1. Parse the sent XML to get the content sent by the user

2. According to the content, to determine the response

3. Reads the contents of the database, returns as a string, replies to information

But there seems to be a problem in the database operation, how can not reply. case '1'everything else is fine.

I tried to add a test to each step in the method getSql() echo '成功' , and no longer returned to the place where I commented, and the gods see what's going on.

How to view support? mysqli I am the content of the CentOS 6.7 php 5.6 phpinfo() display about mysqli as follows:

I know that there is a extension open on the PHP in Windows, what is the PHP configuration inside Linux?

/*-------------------------------------judge the information event, according to the information content sent by the user, determine the reply $arr: the parsed Data sent--------------------------------------*/Public Function Rsptext ($arr) {switch (Strtolower ($arr->co            ntent)) {case ' 1 ': {$this->replymsg ($arr, "success");            };break;            Case ' 2 ': {$this->replymsg ($arr, $this->getsql ());            };break; Case ' time ': {$this->replymsg ($arr, Date ("y-m-d"). "            \ n ". Date (" H:i:s "));            };break;        Default: $this->replymsg ($arr, "See the Sea Yo"); }}/*-----------------------------------reply message $arr: Post data parsed object $content: What to reply to, String-----------------------------------*/Public Function replymsg ($arr, $content = "") {$toUser = $arr->tous        Ername;        $fromUser = $arr->fromusername;        $time = time ();        $msgType = ' text '; $rspPatten = '
  
    
     %s 
     
     %s 
      
     
      %s 
      
      %s  
       %s 
       
     
    
   
  ';        $RSPMSG = sprintf ($rspPatten, $fromUser, $toUser, $time, $msgType, $content);    Echo $RSPMSG;        }//Read Database contents public Function GetSQL () {$host = "111.111.111.111";        $port = ' 1111 ';        $database = "WordPress";        $table = "Wp_posts";        $user = "1111";        $passwd = "1111";        $sql = "Select Post_title from" $table. "Limit 1,10"; ！！！！！！！！！                        Can still return here, the following sentence will no longer return to the!!!!!!!        $link = Mysqli_connect ($host, $user, $passwd, $database, $port);        $tempResult = $link->query ($sql);        $str = "";        while ($row = $tempResult->fetch_array ()) {$str = $str. $row [' Post_title '];        } $link->close (); return $str; Return string}

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