使此算法更有效

我是一個php noob，需要一些幫助。我已經構建了一個推送服務來發送推送消息給iphone。它在評論中說，將幾個消息合併到一個數據包中會更有效率。此外，現在我打電話來刪除每封郵件。我如何將幾個消息合併到一個包中？使此算法更有效

感謝

function start() 
{ 
    writeToLog('Connecting to ' . $this->server); 

    if (!$this->connectToAPNS()) 
     exit; 


    while (true) 
    { 
     // Do at most 20 messages at a time. Note: we send each message in 
     // a separate packet to APNS. It would be more efficient if we 
     // combined several messages into one packet, but this script isn't 
     // smart enough to do that. ;-) 

     $stmt = $this->pdo->prepare('SELECT * FROM push_queue WHERE time_sent IS NULL LIMIT 20'); 
     $stmt->execute(); 
     $messages = $stmt->fetchAll(PDO::FETCH_OBJ); 

     foreach ($messages as $message) 
     { 
      if ($this->sendNotification($message->message_id, $message->device_token, $message->payload)) 
      { 
       //$stmt = $this->pdo->prepare('UPDATE push_queue SET time_sent = NOW() WHERE message_id = ?'); 
       //$stmt->execute(array($message->message_id)); 

       $stmt = $this->pdo->prepare('DELETE FROM push_queue WHERE message_id = ?'); 
       $stmt->execute(array($message->message_id)); 

      } 
      else // failed to deliver 
      { 
       $this->reconnectToAPNS(); 
      } 
     } 

     unset($messages);   
     sleep(5); 
    } 
}

來源

2012-03-17 BlackMouse

你的問題刪除這樣的郵件有無關優化SQL它是關於SQL的結果所做的任何事情......您需要解釋該部分有更多的細節來獲得可用的答案！ – Yahia 2012-03-17 08:31:52

可以組刪除的郵件的ID內陣列

$deletedIds = array() 
foreach ($messages as $message) 
{ 
    if ($this->sendNotification()) 
    { 
     $deletedIds[] = $message->message_id; 
    } 
}

之後，你可以使用查詢方法

$this->pdo->query('DELETE FROM push_queue WHERE message_id IN ('.implode(',', $deletedIds).')');

來源

2012-03-17 08:37:15 Slawek

謝謝。很棒。是否有可能對正在發送的消息查詢做類似的事情？ – BlackMouse 2012-03-17 09:17:31

使此算法更有效

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