我用SQL查询创建了一个csv文件:
$sql = "SELECT 'id','username','name','email',
'phone_number','city',
'batch','course_type' UNION ALL
SELECT id, username, name, email,
phone_number, city, batch, course_type
FROM users INTO OUTFILE '".$file_path."' ".
"FIELDS TERMINATED BY ','
ENCLOSED BY ''"'
LINES TERMINATED BY ''n'";
在导致浏览器强制下载该文件后,我需要从/tmp目录中删除该文件。但由于该文件为mysql所有,php代码无法删除该文件。如何在代码中更改该文件的权限,以便删除该文件?
一个正确的解决方案是(这是如何做到这一点的粗略示例):
将数据库中的数据作为数组返回,并对其进行迭代:
// tell the browser that this is a download
header("Content-type: text/csv");
header("Content-Disposition: attachment; filename=list.csv");
// column separator
$separator = ';';
// field delimiter
$field_delimiter = '"';
// line end
$line_end = "'r'n";
foreach ($result as $row):
$i = 0;
foreach ($row as $item):
// do not add separator before the first item
if ($i > 0)
{
echo $separator;
}
echo $field_delimiter.$item.$field_delimiter;
$i++;
endforeach;
// line end
echo $line_end;
endforeach;
不要输出任何其他内容,只输出CSV内容。