Export MySQL data to Excel without third-party libraries_PHP tutorial

We often encounter the need to export data from the database to Excel files. It is indeed easier to use some open source libraries, such as PHPExcel, but the support for large amounts of data is very poor and it is easy to reach the PHP memory. Usage limit. The method here is to use fputcsv to write CSV files and directly output Excel files to the browser.

// 输出Excel文件头，可把user.csv换成你要的文件名 
header('Content-Type: application/vnd.ms-excel'); 
header('Content-Disposition: attachment;filename="user.csv"'); 
header('Cache-Control: max-age=0'); 
// 从数据库中获取数据，为了节省内存，不要把数据一次性读到内存，从句柄中一行一行读即可 
$sql = 'select * from tbl where ……'; 
$stmt = $db->query($sql); 
// 打开PHP文件句柄，php://output 表示直接输出到浏览器 
$fp = fopen('php://output', 'a'); 
// 输出Excel列名信息 
$head = array('姓名', '性别', '年龄', 'Email', '电话', '……'); 
foreach ($head as $i => $v) { 
    // CSV的Excel支持GBK编码，一定要转换，否则乱码 
    $head[$i] = iconv('utf-8', 'gbk', $v); 
} 
// 将数据通过fputcsv写到文件句柄 
fputcsv($fp, $head); 
// 计数器 
$cnt = 0; 
// 每隔$limit行，刷新一下输出buffer，不要太大，也不要太小 
$limit = 100000; 
// 逐行取出数据，不浪费内存 
while ($row = $stmt->fetch(Zend_Db::FETCH_NUM)) { 
    $cnt ++; 
    if ($limit == $cnt) { //刷新一下输出buffer，防止由于数据过多造成问题 
        ob_flush(); 
        flush(); 
        $cnt = 0; 
    } 
    foreach ($row as $i => $v) { 
        $row[$i] = iconv('utf-8', 'gbk', $v); 
    } 
    fputcsv($fp, $row); 
}

Easy to use, very memory-saving, and does not rely on third-party libraries.

http://www.bkjia.com/PHPjc/752360.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/752360.htmlTechArticleWe often encounter the need to export data from the database to Excel files, using some open source libraries, such as PHPExcel, It is indeed easier to implement, but the support for large amounts of data is very poor, it is easy...