用php将mysql数据表转换为excel文件格式

?php
// define database parameter
$DB_Server = "localhost";
$DB_Username = "root";
$DB_Password = "123";
$DB_DBName = "windlike";
$DB_TBLName = "bank";
// connect database
$Connect = @mysql_connect($DB_Server, $DB_Username, $DB_Password) or die("Couldn't connect.");
$Db = @mysql_select_db($DB_DBName, $Connect) or die("Couldn't select database.");
// set header infomation
$file_type = "vnd.ms-excel";
$file_ending = "xls";
header("Content-Type: application/$file_type");
header("Content-Disposition: attachment; filename=$DB_TBLName.$file_ending");
header("Pragma: no-cache");
header("Expires: 0");
// export data to excel
$now_date = date('Y-m-d H:i');
$title = "
[url=javascript:;]数据库[/url]
名:$DB_DBName, 数据表:$DB_TBLName, 备份日期:$now_date";
echo("$title\n");
$sql = "SELECT * FROM $DB_TBLName";
$ALT_Db = @mysql_select_db($DB_DBName, $Connect) or die("Couldn't select database");
$result = @mysql_query($sql,$Connect) or die(mysql_error());
$sep = "\t";
for ($i = 0; $i  mysql_num_fields($result); $i++) {
    echo mysql_field_name($result,$i) . "\t";
}
print("\n");
$i = 0;
while($row = mysql_fetch_row($result)) {
    $schema_insert = "";
    for($j=0; $jmysql_num_fields($result);$j++) {
        if(!isset($row[$j]))
            $schema_insert .= "NULL".$sep;
        elseif ($row[$j] != "")
            $schema_insert .= "$row[$j]".$sep;
        else
            $schema_insert .= "".$sep;
    }
    $schema_insert = str_replace($sep."$", "", $schema_insert);
    $schema_insert .= "\t";
    print(trim($schema_insert));
    print "\n";
    $i++;
}
return (true);
?>