Possible to use multiple/nested MySQLi statements?

Tags: mysqli mysql php
By : Gilean
Source: Stackoverflow.com
Question!

Is it possible to have a MySQLi prepared statement within the fetch() call of a previous statement? If not, what's the best way around it?

Example code:

if($stmt = $link->prepare("SELECT item FROM data WHERE id = ?")) {
  $stmt->bind_param("i", $id);
  $stmt->execute();
  $stmt->bind_result($item);
  while( $stmt->fetch() ) {
      /* Other code here */
      $itemSummary = $item + $magic;
      if($stmt2 = $link->prepare("INSERT INTO summaries (itemID, summary) VALUES (?, ?)")) {
          $stmt2->bind_param("is", $itemID, $itemSummary);
          $stmt2->execute();
          $stmt2->close();
      }
  }
}
By : Gilean


Answers

This is the single connection way:

if($stmt = $link->prepare("SELECT item FROM data WHERE id = ?"))
{
   $stmt->bind_param("i", $id);
   $stmt->execute();
   $stmt->store_result(); // <-- this
   $stmt->bind_result($item);
   while( $stmt->fetch() )
   {
      /* Other code here */
      $itemSummary = $item + $magic;
      if($stmt2 = $link->prepare("INSERT INTO summaries (itemID, summary) VALUES (?, ?)"))
      {
          $stmt2->bind_param("is", $itemID, $itemSummary);
          $stmt2->execute();
          $stmt2->store_result(); // <-- this
          /*DO WHATEVER WITH STMT2*/
          $stmt2->close();
      }
   }
}


Or use store_result.



You should be able to do that, although you make have to start a second connection.

By : Kibbee


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