PhpMyAdmin 不能导出数据的问题，点击导出后先是一个请求失败或者白页，重新刷新后就报错
export.php: Missing parameter: what (FAQ 2.8)
export.php: Missing parameter: export_type (FAQ 2.8)
解决方法是：
php目录下的php.ini 设置要调整一下
原来的 post_max_size = 8M ，改大到 post_max_size = 20M 就好了。
php源码中解决办法
ini_set(‘memory_limit‘, ‘180M‘);
如果在linux系统中我们就
This is the path to the affected file on the (dv) Dedicated-Virtual Server:
/usr/local/psa/admin/htdocs/domains/databases/phpMyAdmin/libraries
To apply the fix, log in to your server via SSH as a "root" user and run the following commands:
Change directories into the folder with the affected file. cd
/usr/local/psa/admin/htdocs/domains/databases/phpMyAdmin/librariesMove
the old file as a backup. mv session.inc.php session.inc.php-oldDownload the fixed file. wget
http://download1.swsoft.com/Plesk/Autoupdate/Windows/8.1.1.2/120220/session.inc.php
Restart Plesk
/etc/init.d/psa restart
PhpMyAdmin出现export.php Missing parameter: what /export_type错误解决方法
原文：http://www.jb51.net/article/31037.htm
