公共函数actionExportnotificationresponselogdata() {

    $fileName = '/tmp/notificationresponselogs_' . date('d-m-Y-g-i-h') . '.csv';
    $f = fopen($fileName, 'w'); 
     fputs( $f, "\xEF\xBB\xBF" ); //for utf8 support in csv



        $csv_fields=array();
        $csv_fields[] = 'heading1';
        $csv_fields[] = 'heading2';
        $csv_fields[] = 'heading3';
        $csv_fields[] = 'heading4';
        $csv_fields[] = 'heading5';
        $csv_fields[] = 'heading6';
        $csv_fields[] = 'heading7';
        $csv_fields[] = 'heading8';
        fputcsv($f, $csv_fields);

    
$notification_log_arr = $notificationObj->getNotificationResponseForExport($params); //result from database

    if (count($notification_log_arr) > 0) {
        $serialNumber=1;
    foreach ($notification_log_arr AS $notifaction) {
            

            $fields = array();
            $fields['serialNumber']= $serialNumber  ;
            $fields['fld_1']= $notifaction['fld_1'] ;
            $fields['fld_2']= $notifaction['fld_2'] ;
            $fields['fld_3']= $notifaction['fld_3'] ;
            $fields['fld_4']= $notifaction['fld_4'] ;
            $fields['fld_5']= $notifaction['fld_5'] ;
            $fields['fld_6']= $notifaction['fld_6'] ; 
            $fields['fld_7']= $notifaction['fld_7'] ; 
           // print_r($fields); die;
            fputcsv($f, $fields,",");
        
            $serialNumber++;  }
            fclose($f);
            if (file_exists($fileName)) {
                
                header("Content-type: application/csv");
                header("Content-Disposition: attachment; filename="."exportlog".date("Y-m-d_H:i").".csv");
                header("Content-length: " . filesize($fileName));
                header("Pragma: no-cache"); 
                header("Expires: 0");
                readfile($fileName);
                unlink($fileName);
                exit;
            }
}

下面是一个使用PDO并包含列标题的完整工作示例:

$query = $pdo->prepare('SELECT * FROM test WHERE id=?');
$query->execute(array($id));    
$results = $query->fetchAll(PDO::FETCH_ASSOC);
download_csv_results($results, 'test.csv'); 
exit();


function download_csv_results($results, $name)
{            
    header('Content-Type: text/csv');
    header('Content-Disposition: attachment; filename='. $name);
    header('Pragma: no-cache');
    header("Expires: 0");

    $outstream = fopen("php://output", "wb");    
    fputcsv($outstream, array_keys($results[0]));

    foreach($results as $result)
    {
        fputcsv($outstream, $result);
    }

    fclose($outstream);
}

在$output变量中放入CSV数据，并返回正确的报头

header("Content-type: application/download\r\n");
header("Content-disposition: filename=filename.csv\r\n\r\n");
header("Content-Transfer-Encoding: ASCII\r\n");
header("Content-length: ".strlen($output)."\r\n");
echo $output;

而不是:

$query = "SELECT * FROM customers WHERE created>='{$start} 00:00:00'  AND created<='{$end} 23:59:59'   ORDER BY id";
$select_c = mysql_query($query) or die(mysql_error()); 

while ($row = mysql_fetch_array($select_c, MYSQL_ASSOC))
{
    $result.="{$row['email']},";
    $result.="\n";
    echo $result;
}

Use:

$query = "SELECT * FROM customers WHERE created>='{$start} 00:00:00'  AND created<='{$end} 23:59:59'   ORDER BY id";
$select_c = mysql_query($query) or die(mysql_error()); 

while ($row = mysql_fetch_array($select_c, MYSQL_ASSOC))
{
    echo implode(",", $row)."\n";
}

要让它以CSV格式发送，并给出文件名，请使用header():

http://us2.php.net/header

header('Content-type: text/csv');
header('Content-disposition: attachment; filename="myfile.csv"');

至于创建CSV本身，您只需要遍历结果集，格式化输出并发送它，就像处理任何其他内容一样。

公共函数actionExportnotificationresponselogdata() {

    $fileName = '/tmp/notificationresponselogs_' . date('d-m-Y-g-i-h') . '.csv';
    $f = fopen($fileName, 'w'); 
     fputs( $f, "\xEF\xBB\xBF" ); //for utf8 support in csv



        $csv_fields=array();
        $csv_fields[] = 'heading1';
        $csv_fields[] = 'heading2';
        $csv_fields[] = 'heading3';
        $csv_fields[] = 'heading4';
        $csv_fields[] = 'heading5';
        $csv_fields[] = 'heading6';
        $csv_fields[] = 'heading7';
        $csv_fields[] = 'heading8';
        fputcsv($f, $csv_fields);

    
$notification_log_arr = $notificationObj->getNotificationResponseForExport($params); //result from database

    if (count($notification_log_arr) > 0) {
        $serialNumber=1;
    foreach ($notification_log_arr AS $notifaction) {
            

            $fields = array();
            $fields['serialNumber']= $serialNumber  ;
            $fields['fld_1']= $notifaction['fld_1'] ;
            $fields['fld_2']= $notifaction['fld_2'] ;
            $fields['fld_3']= $notifaction['fld_3'] ;
            $fields['fld_4']= $notifaction['fld_4'] ;
            $fields['fld_5']= $notifaction['fld_5'] ;
            $fields['fld_6']= $notifaction['fld_6'] ; 
            $fields['fld_7']= $notifaction['fld_7'] ; 
           // print_r($fields); die;
            fputcsv($f, $fields,",");
        
            $serialNumber++;  }
            fclose($f);
            if (file_exists($fileName)) {
                
                header("Content-type: application/csv");
                header("Content-Disposition: attachment; filename="."exportlog".date("Y-m-d_H:i").".csv");
                header("Content-length: " . filesize($fileName));
                header("Pragma: no-cache"); 
                header("Expires: 0");
                readfile($fileName);
                unlink($fileName);
                exit;
            }
}