MySqlDump is a PHP script that: will backup any number of databases, allows you to download individual backup files or all backups bundled in a zip archive, optionally optimize tables in the databases, deletes old backup files from the server when new backups are created, is executed either via cron or your browser. And it is free.
ZBase is an object framework (set of classes) written in PHP4 allowing to develop the www frontend of a database very quickly and simply. In ZBase, each entry in the database can be considered as an object, and ZBase provides standard methods to modify or display its content. ZBase is aimed at experienced web site developers, not at the low-end user. You won't have this web interface working in less than five minutes. ZBase is released under the General Public Licence.
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