PHP导出大数据

保存到本地

<?php
// a db link for queries 
$lh  = mysql_connect( '127.0.0.1', 'root', '' ); 
// and a controller link 
$clh = mysql_connect( '127.0.0.1', 'root', '', true ); 

if ( mysql_select_db ( 'db', $lh ) ) 
{ 
    $qry    = "SELECT * FROM table limit 200000000"; 
    $rh     = mysql_unbuffered_query( $qry, $lh ); 
    $thread = mysql_thread_id ( $lh );

    $fp = fopen('file.csv', 'w');
    // 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;
    while ( $res = mysql_fetch_row( $rh ) ) 
    { 
        $cnt ++;
        if ($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, $res);
    }
    mysql_query( "KILL $thread", $clh );
    fclose($fp);
    unset($fp);
}
unset($lh, $clh);
?>

直接下载：

<?php

header('pragma:public');
header('Content-type:application/vnd.ms-excel;charset=utf-8;name="abc.csv"');
header("Content-Disposition:attachment;filename=abcd.csv");//attachment新窗口打印inline本窗口打印 

// a db link for queries 
$lh  = mysql_connect( '127.0.0.1', 'root', '' ); 
// and a controller link 
$clh = mysql_connect( '127.0.0.1', 'root', '', true ); 

if ( mysql_select_db ( 'db', $lh ) ) 
{ 
    $qry    = "SELECT * FROM table limit 200000000"; 
    $rh     = mysql_unbuffered_query( $qry, $lh ); 
    $thread = mysql_thread_id ( $lh );

    $fp     = fopen('php://output', 'a');
    // 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;
    while ( $res = mysql_fetch_row( $rh ) ) 
    { 
        $cnt ++;
        if ($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, $res);
    }
    mysql_query( "KILL $thread", $clh );
    fclose($fp);
    unset($fp);
}
unset($lh, $clh);
?>