php使用fputcsv實現(xiàn)大數(shù)據(jù)的導(dǎo)出操作詳解

CREATE TABLE `tb_users` (
 `id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '用戶ID',
 `name` varchar(32) DEFAULT '' COMMENT '用戶名',
 `age` tinyint(3) DEFAULT '0' COMMENT '用戶年齡',
 `desc` varchar(255) DEFAULT '' COMMENT '用戶描述',
 `phone` varchar(11) DEFAULT '' COMMENT '用戶手機(jī)',
 `qq` varchar(16) DEFAULT '' COMMENT '用戶QQ',
 `email` varchar(64) DEFAULT '' COMMENT '用戶郵箱',
 `addr` varchar(255) DEFAULT '' COMMENT '用戶地址',
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

?php
set_time_limit(0);
ini_set('memory_limit', '128M');

//使用TP3.2的String類，php7下會報錯，注意把類名換一下
require './String.class.php';
use Org\Util\NewString;

$begin = microtime(true);

$db = new mysqli('127.0.0.1', 'root', '', 'test');

if($db->connect_error) {
  die('connect error');
}
//數(shù)據(jù)插入語句
$insSql = '';

//一百萬數(shù)據(jù)，分200步，每步插入5000條
$step = 200;
$nums = 5000;

for($s = 0; $s  $step; ++$s) {
  $insSql = 'INSERT INTO tb_users VALUES';
  for($n = 0; $n  $nums; ++$n) {
    $name = NewString::randString(3, 4);
    $age = mt_rand(1, 120);
    $desc = NewString::randString(64, 4);
    $phone = NewString::randString(11, 1);
    $qq = NewString::randString(13, 1);
    $email = $qq . '@qq.com';
    $addr = NewString::randString(128, 4);
    $insSql .= "(NULL, '{$name}', $age, '{$desc}', '{$phone}', '{$qq}', '{$email}', '{$addr}'),";
  }
  $insSql = rtrim($insSql, ',');
  $db->query($insSql);
}
$end = microtime(true);
echo '用時:', $end - $begin;

$db->close();

?php
set_time_limit(0);
ini_set('memory_limit', '128M');

$fileName = date('YmdHis', time());
header('Content-Type: application/vnd.ms-execl');
header('Content-Disposition: attachment;filename="' . $fileName . '.csv"');

$begin = microtime(true);

//打開php標(biāo)準(zhǔn)輸出流
//以寫入追加的方式打開
$fp = fopen('php://output', 'a');

$db = new mysqli('127.0.0.1', 'root', '', 'test');

if($db->connect_error) {
  die('connect error');
}

//我們試著用fputcsv從數(shù)據(jù)庫中導(dǎo)出1百萬的數(shù)據(jù)
//我們每次取1萬條數(shù)據(jù)，分100步來執(zhí)行
//如果線上環(huán)境無法支持一次性讀取1萬條數(shù)據(jù)，可把$nums調(diào)小，$step相應(yīng)增大。
$step = 100;
$nums = 10000;

//設(shè)置標(biāo)題
$title = array('ID', '用戶名', '用戶年齡', '用戶描述', '用戶手機(jī)', '用戶QQ', '用戶郵箱', '用戶地址');
foreach($title as $key => $item) {
  $title[$key] = iconv('UTF-8', 'GBK', $item);
}
//將標(biāo)題寫到標(biāo)準(zhǔn)輸出中
fputcsv($fp, $title);

for($s = 1; $s = $step; ++$s) {
  $start = ($s - 1) * $nums;
  $result = $db->query("SELECT * FROM tb_users ORDER BY id LIMIT {$start},{$nums}");
  
  if($result) {
    while($row = $result->fetch_assoc()) {
      foreach($row as $key => $item) {
        //這里必須轉(zhuǎn)碼，不然會亂碼
        $row[$key] = iconv('UTF-8', 'GBK', $item);
      }
      fputcsv($fp, $row);
    }
    $result->free();
    
    //每1萬條數(shù)據(jù)就刷新緩沖區(qū)
    ob_flush();
    flush();
  }
}

$end = microtime(true);
echo '用時：', $end - $begin;

a href="/downSearchData.php?參數(shù)1=值1參數(shù)2=值2page=1" rel="external nofollow" >下載匯總結(jié)果1/a>
a href="/downSearchData.php?參數(shù)1=值1參數(shù)2=值2page=2" rel="external nofollow" >下載匯總結(jié)果2/a>
a href="/downSearchData.php?參數(shù)1=值1參數(shù)2=值2page=3" rel="external nofollow" >下載匯總結(jié)果3/a>

form id="searchFrm">
  姓名input type="text" name="uname">
  input type="button" id="searchDataBtn" value="導(dǎo)出匯總結(jié)果">
/form>
div id="searchDataList">/div>

script type="script">
  $("#searchDataBtn").on("click", function() {
    var params = $("#searchFrm").serialize();
    
    //獲取查詢數(shù)據(jù)的條數(shù)
    $.get("/getSearchDataRows?" + params, function(data) {
      var downDataList = "";
      if(data["rows"]) {
        //rows是數(shù)據(jù)總條數(shù)，pageSize是一頁多少條
        var pageNum = Math.ceil(data["rows"] / data["pageSize"]);
        for(var i = 1; i = pageNum; ++i) {
          downDataList += "a href='/downSearchData.php?'" + params + "page=" + i + ">下載匯總結(jié)果" + i + "/a>nbsp;nbsp;";
        }
        $("#searchDataList").html(downDataList);
      } else {
        $("#searchDataList").text("沒有數(shù)據(jù)");
      }
    }, "json");
    return false;
  });
/script>