1，我们一般做导出的思路就是，根据我们想要的数据，全部查询出来，然后导出来，这个对数据量很大的时候会很慢，这里我提出来的思想就是分页和缓冲实现动态输出。

2.普通的我就不说了，下面我说一下分页和内存刷新思想。代码如下：

$conn = oci_connect(‘fin_data‘, ‘fin_data‘, "(DEscriptION=(ADDRESS=(PROTOCOL =TCP)(HOST=192.168.6.65)(PORT = 1521))(CONNECT_DATA =(SID=hqygdw)))");

$sqlName = "select *

from user_tab_columns

where Table_Name=‘S_SALE_RECEIVABLE_DETAIL‘

order by column_name";

$filedName = oci_parse($conn, $sqlName);

oci_execute($filedName, OCI_DEFAULT); // 行数 OCI_DEFAULT表示不要自动commit

header(‘Content-Type: application/vnd.ms-excel;charset=gbk‘);

header(‘Content-Disposition: attachment;filename=test_‘ . time() . ‘.csv‘);

header(‘Cache-Control: max-age=0‘);

$fp = fopen(‘php://output‘, ‘a‘);

$head = array();

$i = 0;

while ($row = oci_fetch_array($filedName, OCI_ASSOC + OCI_RETURN_NULLS)) {

$head[$i] = iconv(‘utf-8‘, ‘gbk‘, $row[‘COLUMN_NAME‘]);

$i++;

}

fputcsv($fp, $head);

$selectCount = "select count(*) as counts from S_SALE_RECEIVABLE_DETAIL t ";

$resultCount = oci_parse($conn, $selectCount); // 配置SQL语句，执行SQL

oci_execute($resultCount, OCI_DEFAULT); // 行数 OCI_DEFAULT表示不要自动commit

$count = oci_fetch_array($resultCount, OCI_ASSOC + OCI_RETURN_NULLS);

//$count[‘COUNTS‘]=10;

$pageNum = 50000;

$pagePre = ceil($count[‘COUNTS‘] / $pageNum);

for ($i = 1; $i <= $pagePre; $i++) {

$pageStart = ($i - 1) * $pageNum + $pageNum;

$pageEnd = ($i - 1) * $pageNum;

$select = "SELECT *

FROM (SELECT A.*, ROWNUM RN

FROM (SELECT * FROM S_SALE_RECEIVABLE_DETAIL) A

WHERE ROWNUM <={$pageStart} )

WHERE RN >= {$pageEnd}";

$result = oci_parse($conn, $select); // 配置SQL语句，执行SQL

oci_execute($result, OCI_DEFAULT); // 行数 OCI_DEFAULT表示不要自动commit

$count =0;

while ($rowResult = oci_fetch_array($result, OCI_ASSOC + OCI_RETURN_NULLS)) {

// print_r(explode(‘,‘,$rowResult));exit;

fputcsv($fp,$rowResult);

$count++;

if($count>=$pageNum){

ob_flush();

flush();

}

}

}

fputcsv($fp, $head);

原文：http://www.cnblogs.com/kobigood/p/6936388.html