mysqli_use_result(3) [php man page]

MYSQLI_USE_RESULT(3)							 1						      MYSQLI_USE_RESULT(3)

mysqli::use_result - Initiate a result set retrieval

       Object oriented style

SYNOPSIS

       mysqli_result mysqli::use_result (void  )

DESCRIPTION

       Procedural style
       mysqli_result mysqli_use_result (mysqli	$link)

	Used  to  initiate the retrieval of a result set from the last query executed using the mysqli_real_query(3) function on the database con-
       nection.

	Either this or the mysqli_store_result(3) function must be called before the results of a query can be retrieved, and  one  or	the  other
       must be called to prevent the next query on that database connection from failing.

       Note

	       The mysqli_use_result(3) function does not transfer the entire result set from the database and hence cannot be used functions such
	      as mysqli_data_seek(3) to move to a particular row within the set. To use this functionality, the result set must  be  stored  using
	      mysqli_store_result(3).  One  should not use mysqli_use_result(3) if a lot of processing on the client side is performed, since this
	      will tie up the server and prevent other threads from updating any tables from which the data is being fetched.

RETURN VALUES

	Returns an unbuffered result object or FALSE if an error occurred.

EXAMPLES

       Example #1

	      mysqli::use_result example

	      Object oriented style

	      <?php
	      $mysqli = new mysqli("localhost", "my_user", "my_password", "world");

	      /* check connection */
	      if (mysqli_connect_errno()) {
		  printf("Connect failed: %s
", mysqli_connect_error());
		  exit();
	      }

	      $query  = "SELECT CURRENT_USER();";
	      $query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

	      /* execute multi query */
	      if ($mysqli->multi_query($query)) {
		  do {
		      /* store first result set */
		      if ($result = $mysqli->use_result()) {
			  while ($row = $result->fetch_row()) {
			      printf("%s
", $row[0]);
			  }
			  $result->close();
		      }
		      /* print divider */
		      if ($mysqli->more_results()) {
			  printf("-----------------
");
		      }
		  } while ($mysqli->next_result());
	      }

	      /* close connection */
	      $mysqli->close();
	      ?>

	      Procedural style

	      <?php
	      $link = mysqli_connect("localhost", "my_user", "my_password", "world");

	      /* check connection */
	      if (mysqli_connect_errno()) {
		  printf("Connect failed: %s
", mysqli_connect_error());
		  exit();
	      }

	      $query  = "SELECT CURRENT_USER();";
	      $query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

	      /* execute multi query */
	      if (mysqli_multi_query($link, $query)) {
		  do {
		      /* store first result set */
		      if ($result = mysqli_use_result($link)) {
			  while ($row = mysqli_fetch_row($result)) {
			      printf("%s
", $row[0]);
			  }
			  mysqli_free_result($result);
		      }
		      /* print divider */
		      if (mysqli_more_results($link)) {
			  printf("-----------------
");
		      }
		  } while (mysqli_next_result($link));
	      }

	      /* close connection */
	      mysqli_close($link);
	      ?>

	      The above examples will output:

	      my_user@localhost
	      -----------------
	      Amersfoort
	      Maastricht
	      Dordrecht
	      Leiden
	      Haarlemmermeer

SEE ALSO

       mysqli_real_query(3), mysqli_store_result(3).

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