thinkPHP导出csv文件及用表格输出excel的方法

<?php
namespace Home\Controller;
use Think\Controller;
class IndexController extends Controller {
 public function index(){
  $hotel = M('keywords')->field('PageName,Page')->select();
  $str = "关键字,名称\n";
  $str = iconv('utf-8','gb2312',$str);
  $result = mysql_query("select PageName,Page from hotel_keywords");
  while($row=mysql_fetch_array($result)){
   $PageName = iconv('utf-8','gb2312',$row['PageName']);
   $Page = iconv('utf-8','gb2312',$row['Page']);
   $str .= $PageName.",".$Page."\n";
  }
  $fileName = date('Ymd').'.csv';
  $model = D('Keywords');
  $model->export_csv($fileName,$str);
  exit;
 }
}

<?php 
namespace Home\Model;
use Think\Model;
class KeywordsModel extends Model{
 public function export_csv($filename, $data){
  header("Content-type:text/csv"); 
  header("Content-Disposition:attachment;filename=".$filename); 
  header('Cache-Control:must-revalidate,post-check=0,pre-check=0'); 
  header('Expires:0'); 
  header('Pragma:public');
  echo $data;
  
 }
}

<?php
require('page_header.php');
$site_id = getIfSet($_GET, 'site_id', 0);
$customer_type = getIfSet($_GET, 'customer_type',0);
$DB = Database::connect($site_id);
if($site_id>0 && $customer_type>0){
 $sql = '';
 $out = ''; 
 $short_name_array = SiteSettings::$SITE_SHORT_NAME;
 $short_name = $short_name_array[$site_id]; 
 switch ($customer_type) {
  case '1':{
   $sql = "SELECT 
      email, CONCAT(UCASE(LEFT(firstname, 1)),SUBSTRING(firstname, 2)) AS firstname, CONCAT(UCASE(LEFT(lastname, 1)),SUBSTRING(lastname, 2)) AS lastname 
     FROM customers 
     WHERE site_id =$site_id 
      AND email NOT REGEXP '.+(avanquest)|(planetart)|(novadevelop)|(qatest).+' 
      AND email IN(SELECT a.email FROM customers a INNER JOIN orders b ON a.id=b.`customer_id` AND b.is_test=0 AND a.site_id =$site_id) 
      AND email NOT IN (SELECT email_address FROM `newsletter_unsubscribes` WHERE site_id =$site_id);";
   $res = $DB->query($sql);
   $out = '<table class="data_table"><tr><th>email</th><th>firstname</th><th>lastname</th></tr>';
   while($row = mysql_fetch_array($res)){
    $out .= '<tr><td>'.$row['email'].'</td><td>'.$row['firstname'].'</td><td>'.$row['lastname'].'</td></tr>';
   }
   $short_name .= '_purchased';
   break;
  }
  case '2':{
   $DB->query("DROP TEMPORARY TABLE IF EXISTS tmp_purchase;");
   $DB->query("CREATE TEMPORARY TABLE tmp_purchase SELECT a.email FROM customers a INNER JOIN orders b ON a.id=b.`customer_id` AND b.is_test=0 AND a.site_id =$site_id; ");
   $DB->query("DROP TEMPORARY TABLE IF EXISTS tmp_nopurchase;");
   $DB->query("CREATE TEMPORARY TABLE tmp_nopurchase SELECT email FROM customers WHERE site_id =$site_id AND email NOT IN(SELECT email FROM tmp_purchase);");
   if(9 != $site_id){
    $datatype = SiteSettings::getPurchaseDataType($site_id);
    $DB->query("INSERT tmp_nopurchase SELECT DISTINCT email FROM triggered_email_data WHERE datatype='$datatype' AND email NOT IN(SELECT email FROM tmp_purchase);");
   }
   $sql = "SELECT DISTINCT email FROM tmp_nopurchase WHERE email NOT REGEXP '.+(avanquest)|(planetart)|(novadevelop)|(qatest).+' AND Email REGEXP '[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$' AND email NOT IN (SELECT email_address FROM `newsletter_unsubscribes` WHERE site_id =$site_id);";
   $res = $DB->query($sql);
   $out = '<table class="data_table"><tr><th>email</th></tr>';
   while($row = mysql_fetch_array($res)){
    $out .= '<tr><td>'.$row['email'].'</td></tr>';
   }
   $short_name .= '_non-purchased and signup';
   break;
  }
  default:
   break;
 }
 $out .= '</table>';
 header("Content-type:application/vnd.ms-excel");
 header("Content-Disposition:filename=$short_name.xls");
 echo $out;
 exit;
}
?>
<h1>Purchase Prospects Report</h1>
<form name="frm" method="get" action="purchase_prospects.php">
<strong>Select Site:</strong> 
<select name="site_id" id="site_id">
 <option value="0">== select site ==</option>
 <option value="1">STI</option>
 <option value="2">PA</option>
 <option value="3">CW</option>
 <option value="6">MCC</option>
 <option value="9">CB</option>
 <option value="4">STIUK</option>
 <option value="8">MCCUK</option>
</select> &nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;
<strong>Select Type:</strong>
<select id="customer_type" name="customer_type">
 <option value="0">== select type ==</option>
 <option value="1">purchased</option>
 <option value="2">non-purchased and signup</option>
</select>
&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;
<input id="submit" type="submit" value="Run &raquo;">
</form>
<script type="text/javascript">
 $(function(){
  $("#submit").click(function(){
   if('0' == $("#site_id").val() || '0' == $("#customer_type").val()){
    alert('please select Site and Site');
    return false;
   }
  })
 });
</script>