将数据库连接信息、查询条件、标题信息替换为真实数据即可使用。
<?php set_time_limit(0); ini_set(‘memory_limit‘, ‘128M‘); $fileName = date(‘YmdHis‘, time()); header(‘Content-Encoding: UTF-8‘); header("Content-type:application/vnd.ms-excel;charset=UTF-8"); header(‘Content-Disposition: attachment;filename="‘ . $fileName . ‘.csv"‘); //打开php标准输出流 //以写入追加的方式打开 $fp = fopen(‘php://output‘, ‘a‘); //连接数据库 $dbhost = ‘127.0.0.1‘; $dbuser = ‘root‘; $dbpwd = ‘‘; $con = mysqli_connect($dbhost, $dbuser, $dbpwd); if (mysqli_connect_errno()) { die(‘connect error‘); } //选择数据库 $database = ‘test‘; mysqli_select_db($con, $database); //设置编码 mysqli_query($con, "set names UTF8"); //我们试着用fputcsv从数据库中导出1百万的数据 //我们每次取1万条数据,分100步来执行 //如果线上环境无法支持一次性读取1万条数据,可把$nums调小,$step相应增大。 $step = 100; $nums = 10000; $where = ""; //筛选条件 //设置标题 $title = array(‘ID‘,‘姓名‘,‘年龄‘,‘性别‘); foreach($title as $key => $item) { $title[$key] =iconv("UTF-8", "GBK", $item); } //将标题写到标准输出中 fputcsv($fp, $title); for($s = 1; $s <= $step; $s++) { $start = ($s - 1) * $nums; $result = mysqli_query($con,"SELECT * FROM `test` ".$where." ORDER BY `id` LIMIT {$start},{$nums}"); if($result) { while($row = mysqli_fetch_assoc($result)) { foreach($row as $key => $item) { //这里必须转码,不然会乱码 $row[$key] = iconv("UTF-8", "GBK", $item); } fputcsv($fp, $row); } mysqli_free_result($result); //释放结果集资源 //每1万条数据就刷新缓冲区 ob_flush(); flush(); } } //断开连接 mysqli_close($con);
原文地址:https://www.cnblogs.com/whx-blogs/p/9973482.html
时间: 2024-10-14 00:33:57