将php数据下载csv文件

<?php
$sales = array(
array(
'Northeast', '2005-01-01', '2005-02-01', 12.54
),
array(
'Northwest', '2005-01-01', '2005-02-01', 546.33
),
array(
'Southeast', '2005-01-01', '2005-02-01', 93.26
),
array(
'Southeast', '2005-01-01', '2005-02-01', 945.21
),
array(
'All Regions', '--', '--', 1597.34
),
);

$output = fopen('php://output', 'w') or die("Can't open php://output");
$total = 0;

//告诉浏览器发送的是一个csv文件
header("Content-type:application/csv");
header('Content-Disposition:attachment; filename="sales.csv"');
//输出表头
fputcsv($output, array('Region','Start Date','End Date','Amount'));
//输出每一行数据，并递增 $total
foreach ($sales as $sales_line) {
fputcsv($output, $sales_line);
$total += $sales_line[3];
}
//输出全部数据行总和
fputcsv($output, array("All Regions", '--', '--', $total));
//关闭文件句柄
fclose($output) or die("can't close php://output");