退格不能在PHP中工作的原因是什麼？

Question

<?php 
echo "hello\x08"; 
?> 

了出來把這個即將到來的

你好

我工作的XAMPP爲localhost

$reply='{'; 
     while($row=$this->conx->fetch_array($result)){ 
      $user=new user(); 
      $fullname=$user->get('fullname','id',$row['posted_by']); 
      $now=getdat($row['posted_on']); 
      $reply.='"count'.$count.'":{"id":'.$row['post_id'].',"user":"'.$fullname['fullname'].'","msg":"'.$row['msg'].'","at":"'.$now.'"},'; 
     } 
     $reply.='}'; 
    return $reply;} 

我怎樣才能刪除最後一個 '' 從回覆嗎？

Answer 1

試試看。

$reply = rtrim($reply,","); 

使用你的例子

$reply='{'; 
     while($row=$this->conx->fetch_array($result)){ 
      $user=new user(); 
      $fullname=$user->get('fullname','id',$row['posted_by']); 
      $now=getdat($row['posted_on']); 
      $reply.='"count'.$count.'":{"id":'.$row['post_id'].',"user":"'.$fullname['fullname'].'","msg":"'.$row['msg'].'","at":"'.$now.'"},'; 
     } 
     $reply.='}'; 
    return rtrim($reply,",");}