php man page for sqlsrv_cancel

SQLSRV_CANCEL(3)														  SQLSRV_CANCEL(3)

sqlsrv_cancel - Cancels a statement

SYNOPSIS
       bool sqlsrv_cancel (resource  $stmt)

DESCRIPTION
	Cancels  a  statement.	Any results associated with the statement that have not been consumed are deleted. After sqlsrv_cancel(3) has been
       called, the specified statement can be re-executed if it was created with sqlsrv_prepare(3). Calling sqlsrv_cancel(3) is not  necessary	if
       all the results associated with the statement have been consumed.

PARAMETERS
	      o $stmt
		- The statement resource to be cancelled.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

EXAMPLES
       Example #1

	      sqlsrv_cancel(3) example

	      <?php
	      $serverName = "serverNamesqlexpress";
	      $connectionInfo = array( "Database"=>"dbName", "UID"=>"username", "PWD"=>"password");
	      $conn = sqlsrv_connect( $serverName, $connectionInfo);
	      if( $conn === false ) {
		   die( print_r( sqlsrv_errors(), true));
	      }

	      $sql = "SELECT Sales FROM Table_1";

	      $stmt = sqlsrv_prepare( $conn, $sql);

	      if( $stmt === false ) {
		   die( print_r( sqlsrv_errors(), true));
	      }

	      if( sqlsrv_execute( $stmt ) === false) {
		   die( print_r( sqlsrv_errors(), true));
	      }

	      $salesTotal = 0;
	      $count = 0;

	      while( ($row = sqlsrv_fetch_array( $stmt)) && $salesTotal <=100000)
	      {
		   $qty = $row[0];
		   $price = $row[1];
		   $salesTotal += ( $price * $qty);
		   $count++;
	      }

	      echo "$count sales accounted for the first $$salesTotal in revenue.<br />";

	      // Cancel the pending results. The statement can be reused.
	      sqlsrv_cancel( $stmt);
	      ?>

NOTES
	The  main  difference between sqlsrv_cancel(3) and sqlsrv_free_stmt(3) is that a statement resource cancelled with sqlsrv_cancel(3) can be
       re-executed if it was created with sqlsrv_prepare(3). A statement resource cancelled with sqlsrv_free_statement(3) cannot be re-executed.

SEE ALSO
       sqlsrv_free_stmt(3), sqlsrv_prepare(3).

PHP Documentation Group 													  SQLSRV_CANCEL(3)