Syncronization of offline and online database with MySql and PHP

hi there has anybody tried synchronization of online and offline database in mysql and PHP. also has anybody written a script that takes backup of mysql database and restoring it whenever needed. any help, code or pointer in this regard would be of great help to me. manoj nahar IG Technologies Limited , Mumbai Tel* 91-22-7611314/ 7904285 Fax* 91-22-7611315 http://www.igtechnologies.com ************************************************************************** DISCLAIMER *************************************************************************** Any content of this e-mail shall not be disclosed to or used by anyone other than the addressee(s), nor copied in any way. If received in error, Please delete it and advice the sender immediately.The contents of the e-mail is not controlled by IG Technologies Limited. ------------------------------------------------------------------------------------------------