Hello, I'd be interested to learn cms development especially wordpress, what would be the cost for the same? and what about time frame... I'm a full time employee so little bit curious about time.
It doesn't cost anything to learn, you can download and install Apache (web server software), MySQL (database server software) and PHP (parses .php and sends the output of the parsing to the web browser) separately or you can download WAMP which is a package with them bundled together for Windows. As for how long it'll take you to learn it all, that's down to you some will learn it quick and others will take a long time. One thing to keep in mind, steer well clear of the mysql_* extension as it's deprecated as of the current version of PHP, you should use either the mysqli_* extension or PDO.