php调用SQL SERVER 2008及以上版本的方法

$MSSQL_SERVER="localhost";
$connectionInfo = array( "Database"=>"DBNAME", "UID"=>"sa", "PWD"=>"123456");

/*********************/
/*                   */
/*  Version : 5.1.0  */
/*  Author  : RM     */
/*  Comment : ms_conn.php */
/*                   */
/*********************/
//MSSQL连接部分
	
function open_mssqlconn( )
{		
	global $mssql_connection;
	include_once( "oa_config.php" );
	if (!$mssql_connection){
	   $mssql_link=sqlsrv_connect( $MSSQL_SERVER, $connectionInfo);	   	   
	   if (!$mssql_link){
			echo "Could not connect.\n";
			die( print_r( sqlsrv_errors(), true));
	   }
	   return $mssql_link;
	} else {
		return $mssql_connection;
	}
}
//SQL查询
function mssqlquery($Q)
{
	if (!$mssql_connection){
		$mssql_connection=open_mssqlconn();
	}
	$cursor=sqlsrv_query($mssql_connection,$Q);
	if ( !$cursor )
	{
		echo "SQL查询出错.\n";
		die( print_r( sqlsrv_errors(), true));
	}
	return $cursor;
}
//执行SQL
function mssqlexec($Q){
	$stmt = sqlsrv_prepare( $mssql_connection, $Q);
	if( $stmt===false )
	{		 
		 echo "SQL预编译出错.\n";
		 return false;
		 die( print_r( sqlsrv_errors(), true));		 
	}
	/* Execute the statement. Display any errors that occur. */
	if( sqlsrv_execute( $stmt)===false)	
	{
		 echo "执行SQL出错.\n";
		 return false;
		 die( print_r( sqlsrv_errors(), true));
	}
	/* Free the statement and connection resources. */
	sqlsrv_free_stmt($stmt);
	return true;
}
if (!$mssql_connection)
{
    $mssql_connection=open_mssqlconn();
}

//获取存货名称
	public function getcinvname(){
		$cinvcode=iconv("UTF-8","GBK", $_POST["cinvcode"]);
		$query="select cinvname from inventory where cinvcode='{$cinvcode}'";			
		$cursor=mssqlquery($query);
		$cinvname='';
		while($ROW=sqlsrv_fetch_array($cursor,SQLSRV_FETCH_ASSOC)){
			$cinvname=iconv("GBK","UTF-8",$ROW["cinvname"]);
		}
		sqlsrv_free_stmt($cursor);
		$this->returnajax(0,$cinvname);
	}