用php导入10W条+ 级别的csv大文件数据到mysql。导出10W+级别数据到csv文件

前言：

如题。我们这里说的是csv文件的行数达到10W以上。这个是一个难点。

1. 说说csv 和 Excel 

这两者都是我们平时导出或者导入数据一般用到的载体。两者有什么区别呢？csv 格式更兼容一点。那么共同点都是GBK格式的，非UTF8。所以我们上传文件的时候，老是出现乱码，就是编码问题没有转好导致。

2. 推荐的几种方法

1. 函数 fgetss($handel);  返回字符串。它就是strip_tags(fget($handel))的组合读取csv 文件的一行。去掉了其中的HTML，php 等标签。这种方法使用于小的csv 文件

$handle=fopen("1.csv","r");while(!feof($handle)){    $buffer=fgetss($handle,2048);    $row = mb_convert_encoding(trim($buffer), 'utf-8', 'gbk'); //很重要。转换成UTF8格式，不然容易产生乱码    $data=explode(",",$row); //转换成数组    $insertRows[]    = $data;} //这样所有的csv文件就生成一个二维数组$insertRows;

2. 函数 fgetcsv($handel,2048,','),返回数组，它就是explode(",",fget($handel))的组合。这种方法使用于小的csv 文件。而且不适合有汉字的csv 文件。

$handle=fopen("1.csv","r");while($data=fgetcsv($handle,1000,",")){   $insertRows[]    = $data;}  //这样所有的csv文件就生成一个二维数组$insertRows;

3. 说到正题了。上面2种方法适合少量的csv 文件。如果一个文件有10W+ 以上的行数，恐怕就很悲剧了。

$handle=fopen("1.csv","r");    //将文件一次性全部读出来$excelData = array();$content = trim(file_get_contents($fileName));$excelData = explode("\n",$content);

或者直接用$excelData = file($file);   file(） 函数直接将数据读出并放入数组当中。

我们先将所有的文件一次性读出来。放到一个数组$excelData 中。这个时候，我们就可以不用管这个csv 文件了，纯粹了php 操作数组了。所以。不会崩溃异常：

$chunkData = array_chunk($excelData , 5000); // 将这个10W+ 的数组分割成5000一个的小数组。这样就一次批量插入5000条数据。mysql 是支持的。$count = count($chunkData);for ($i = 0; $i < $count; $i++) {$insertRows = array();foreach($chunkData[$i] as $value){$string = mb_convert_encoding(trim(strip_tags($value)), 'utf-8', 'gbk');//转码$v = explode(',', trim($string));$row = array();$row['cdate']    = empty($v[0]) ? date('Y-m-d') : date('Y-m-d',strtotime($v[0]));$row['business'] = $v[1];$row['project']  = $v[2];$row['shopname'] = $v[3];$row['shopid']   = $v[4];$row['fanli']    = formatNumber($v[5]);$row['fb'] = $v[6] * 100;$row['jifen']    = $v[7];$sqlString       = '('."'".implode( "','", $row ) . "'".')'; //批量$insertRows[]    = $sqlString;}$result = $model->addDetail($insertRows); //批量将sql插入数据库。}

插入数据库当然是批量插入了：

public function addDetail($rows){if(empty($rows)){return false;}//数据量较大,采取批量插入$data = implode(',', $rows);$sql = "INSERT IGNORE INTO tb_account_detail(cdate,business,project,shopname,shopid,fanli,fb,jifen) VALUES {$data}";$result = $this->query($sql);return true;}

ok ! 亲测试。10W 数据。6个字段。插入需要10秒。

-----------------2013-12-18 日更新---------------------

3. 导出10W+的数据到csv

放弃之前写的一篇博客中用到的方法：http://blog.csdn.net/think2me/article/details/8596833 。原因是：当超过50W+ 以上的数据时，有可能浏览器崩溃，内存超。

这个方法是写文件的方式。然后再把文件弹出下载。

public function dump2Excel() {set_time_limit(0);ini_set('memory_limit', '640M');//获取列表$name = $this->getActionName();$model = D(GROUP_NAME . '.' . $name);$map = $this->_search();//文件名if (isset($_GET['error']) && $_GET['error'] > 0) {$filename = C('IMG_PATH').'account_data_error_' . $map['action_id'] . '_' . date('Y-m-d', mktime()) . '.csv';}else{$filename = C('IMG_PATH').'account_data_all_' . $map['action_id'] . '_' . date('Y-m-d', mktime()) . '.csv';}//用户信息,商家ID,联盟,商家订单号,商品分类,确认类别,下单时间,完成时间,//实际支付金额,佣金,佣金补贴,返利,F币,论坛积分,备注,强制入库// 'user_info', 'shopid', 'league', 'order_id', 'classify', 'confirm_type',//'buydate', 'paydate', 'real_pay', 'commission', 'commission_plus',// 'fanli', 'jifen', 'bbs', 'remarks', 'persist_execute', 'unique_sign','error_code'$header[] =  iconv("utf-8", "gb2312", "用户信息");$header[] = iconv("utf-8", "gb2312", "商家ID");$header[] = iconv("utf-8", "gb2312", "联盟");$header[] = iconv("utf-8", "gb2312", "商家订单号");$header[] = iconv("utf-8", "gb2312", "商品分类");$header[] = iconv("utf-8", "gb2312", "确认类别");$header[] = iconv("utf-8", "gb2312", "下单时间");$header[] = iconv("utf-8", "gb2312", "完成时间");$header[] = iconv("utf-8", "gb2312", "实际支付金额");$header[] = iconv("utf-8", "gb2312", "佣金");$header[] = iconv("utf-8", "gb2312", "佣金补贴");$header[] = iconv("utf-8", "gb2312", "返利");$header[] = iconv("utf-8", "gb2312", "F币");$header[] = iconv("utf-8", "gb2312", "论坛积分");$header[] = iconv("utf-8", "gb2312", "备注");$header[] = iconv("utf-8", "gb2312", "强制入库");$header[] = iconv("utf-8", "gb2312", "唯一标识");$header[] = iconv("utf-8", "gb2312", "错误信息");$headerFile = implode(',', $header);//写入标题@unlink($filename);file_put_contents($filename, $headerFile."\n");//获取所有error_code$list = D('Fanli')->table('tb_account_action_data_error_code')->field('id,err_msg')->findAll();$error_msg = array();foreach ($list as $value) {$error_msg[$value['id']] = $value['err_msg'];}//导入错误的数据if (isset($_GET['error']) && $_GET['error'] > 0) {$map['error_code'] = array('gt', 0);}if (!empty($map['action_id'])) {$allCount = $model->where($map)->field('count(1) as count')->select();$pageLimit = ceil($allCount[0]['count']/self::PAGE_COUNT);$voList = array();//打开文件if (!$handle = fopen($filename, 'a')) {echo "不能打开文件 $filename";exit;}//分页获取for($i=0;$i<$pageLimit;$i++){$count = self::PAGE_COUNT;$start = $count * $i;$limit = "$start,$count";$voList  = $model->where($map)->limit($limit)->order('id desc')->findAll();//写入文件$excelString = array();foreach ($voList as $v) {$dumpExcel = array();$dumpExcel[] = mb_convert_encoding($v['user_info'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['shopid'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['league'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['order_id'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['classify'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['confirm_type'], 'GBK', 'UTF-8');$dumpExcel[] = "'".mb_convert_encoding($v['buydate'], 'GBK', 'UTF-8');$dumpExcel[] = "'".mb_convert_encoding($v['paydate'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['real_pay'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['commission'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['commission_plus'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['fanli'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['jifen'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['bbs'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($v['remarks'], 'GBK', 'UTF-8');$dumpExcel[] = intval($v['persist_execute']);$dumpExcel[] = mb_convert_encoding($v['unique_sign'], 'GBK', 'UTF-8');$dumpExcel[] = mb_convert_encoding($error_msg[$v['error_code']], 'GBK', 'UTF-8');$excelString[] = implode(',',$dumpExcel);}//只能一行行些。不然容易漏foreach($excelString as $content){fwrite($handle, $content . "\n");}unset($excelString);}fclose($handle);}//导出下载header("Content-type: application/octet-stream");header('Content-Disposition: attachment; filename="' . basename($filename) . '"');header("Content-Length: ". filesize($filename));readfile($filename);}