在特定條件下重做最後的foreach循環指令

Question

我們正在向web服務發出1000次請求。每次我們提出請求時，我們都會期待響應，但有時web服務會失敗並且不會提供響應。發生這種情況時，我們想睡30秒，然後在失敗的最後一點重新運行該循環。如何才能做到這一點？

這裏的基本結構：

foreach ($objects as $object) { 
    foreach ($otherObjects as $otherObject) { 

     //Prepare request data from $object and $otherObjects 

     //Send request to webservice using cURL 

     //Receive response and check to see if success 
     if (isset($response)) { 
      //Save response to database 
     } else { 
      //Not successful. Sleep for 30 seconds. Send request again up to 3 times. If ultimately successful continue, if not break and alert system admin. 
     } 
    } 
} 

Answer 1

你可能關中斷請求到一個函數：

foreach ($objects as $object) { 
    foreach ($otherObjects as $otherObject) { 
     $tries = 0; 
     //Receive response and check to see if success. 
     while(($response = doRequest($object, $otherObject)) === false && $tries < 3) { 
      //Not successful. Sleep for 30 seconds. Send request again up to 3 times. 
      $tries++; 
      sleep(30); 
     } 
     if ($response) { 
      //Successful save response to database. 
     } else { 
      //Not successful break and alert system admin. 
    } 
} 

function doRequest($object, $otherObject) { 
    //Prepare request data from $object and $otherObject. 
    //Send request to webservice using cURL. 

    return $result; 
} 

Answer 2

foreach ($objects as $object) { 
    foreach ($otherObjects as $otherObject) { 

     //Prepare request data from $object and $otherObjects 

     //Send request to webservice using cURL 

     //Receive response and check to see if success 
     if (isset($response)) { 
      //Save response to database 
     } else { 
      $retriesLeft = 3; 
      do { 
       sleep(30); 

       // perform the request again 

       --$retriesLeft; 
      } 
      while (!isset($response) && $retriesLeft); 
     } 
    } 
} 

更新：簡體版

foreach ($objects as $object) { 
    foreach ($otherObjects as $otherObject) { 
     $retriesLeft = 4; 

     //Prepare request data from $object and $otherObjects 

     do { 
      //Send request to webservice using cURL 

      //Receive response and check to see if success 

      if (isset($response)) { 
       break; 
      } 
      else { 
       sleep(30); 
       --$retriesLeft; 
      } 
     } 
     while (!isset($response) && $retriesLeft); 
    } 
}