2019独角兽企业重金招聘Python工程师标准>>> 
参考资料 ： https://blog.csdn.net/tim_phper/article/details/77581071 https://www.imooc.com/wenda/detail/316785
/*** 下载/导出到csv文件* @param $title 标题栏标题* @param $data : array($count = M(表名)->where($where)->count(), $data_model = M(表名)->where($where)->order($order))* @param $sqlLimit 单文件允许写入最大行* @param $mark 文件名标记信息名称* @param $func 回调函数处理查询出来的数据*/
function downloadCsv(array $title, $data, $sqlLimit = 10000, $mark = 'test', $func = '')
{set_time_limit(0);$sqlCount = $data[0];$max_line_perfile = 100000; //单文件允许写入最大行// 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;charset=utf-8');header('Content-Disposition: attachment;filename="' . $mark . '.csv' . '"');header('Cache-Control: max-age=0');//临时文件的删除处理$path = "./Upload/export/" . date('Ymd');//判断目录存在否，存在将删除目录下所有文件if (is_dir($path)) {rmdirr($path);} if (!is_dir($path)) {//创建目录mkdir(iconv("UTF-8", "GBK", $path), 0777, true);}//每次只从数据库取最大数目以防变量缓存太大// 每隔$limit行，刷新一下输出buffer，不要太大，也不要太小$limit = $sqlLimit;// buffer计数器$cnt = 0;$fileNameArr = array();// 逐行取出数据，不浪费内存for ($i = 0; $i < ceil($sqlCount / $sqlLimit); $i++) {$tmp_filename = $path . '/' . $mark . '_' . $i . '.csv';$fp = fopen($tmp_filename, 'w'); //生成临时文件// chmod('attack_ip_info_' . $i . '.csv',777);//修改可执行权限$fileNameArr[] = $tmp_filename;// 将数据通过fputcsv写到文件句柄foreach ($title as $key => &$value) {$value = iconv("UTF-8", "GBK", $value);}fputcsv($fp, $title);$dataArr = $data[1]->limit($i * $sqlLimit, $sqlLimit)->select();foreach ($dataArr as $a) {if($func) { $func($a); }//判断是否为多维数组来决定是一次写几行if(count($a) == count($a, 1)){ //一维数组if($sqlLimit > $max_line_perfile){//限制一个文件不超过最大行exit('下载单文件数目过大，请重新设置');}$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;}fputcsv($fp, $a);} else {if(($sqlLimit * count($a)) > $max_line_perfile){//限制一个文件不超过100000行exit('下载单文件数目过大，请重新设置');}foreach ($a as $a_v) {$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;}fputcsv($fp, $a_v);}}}fclose($fp); //每生成一个文件关闭}//进行多个文件压缩$zip = new ZipArchive();$filename = $path . '/' . $mark . ".zip";$zip->open($filename, ZipArchive::CREATE); //打开压缩包foreach ($fileNameArr as $file) {$zip->addFile($file, basename($file)); //向压缩包中添加文件}$zip->close(); //关闭压缩包foreach ($fileNameArr as $file) {unlink($file); //删除csv临时文件}//输出压缩文件提供下载header("Cache-Control: max-age=0");header("Content-Description: File Transfer");header('Content-disposition: attachment; filename=' . date('YmdHis').'_'.basename($filename)); // 文件名header("Content-Type: application/zip"); // zip格式的header("Content-Transfer-Encoding: binary"); //header('Content-Length: ' . filesize($filename)); //@readfile($filename);//输出文件;unlink($filename); //删除压缩包临时文件
}引用片段
$title = array("ID\t","用户名\t","币种\t","变动资金\t","剩余资金\t","日志类型\t","行为\t","日志描述\t","IP\t","产生路径\t","时间\t");$where = preg_replace('/a\./', 'c.', $where);$where = preg_replace('/b\./', 'd.', $where);$data_model = M('user_coinlog as c')->join('LEFT JOIN basanyi_user as d on c.userid = d.id')->where($where)->field('d.username,c.*')->order('c.id desc');downloadCsv($title, array($count, $data_model), 50000, 'user_trade', function(&$data){//数据处理显示$data['add_time'] = addtime($data['add_time']);//排序并排除不需要的字段$tmp_data = [];$tmp_data[0] = $data['id'];$tmp_data[1] = $data['username'];$tmp_data[2] = $data['coin_name'];$tmp_data[3] = $data['effect'];$tmp_data[4] = $data['total'];$tmp_data[5] = $data['log_type'];$tmp_data[6] = iconv("UTF-8", "GBK", $data['action']);$tmp_data[7] = iconv("UTF-8", "GBK", $data['content']);$tmp_data[8] = $data['ip'];$tmp_data[9] = $data['node'];$tmp_data[10] = $data['add_time'];$data = $tmp_data;});
