Using a variable in the WHERE Clause

Question

I am a newbie in MySQL and PHP. I have a HTML form where I would like to pass 1 variable from to my PHP code and then run a query on my database for the record that holds that v

Answer 1

Looks like a quote issue:

 $sql = 'SELECT * FROM `SiteInfo` WHERE `Serial` ='.$serial.'; 

should be

 $sql = "SELECT * FROM `SiteInfo` WHERE `Serial` ='".$serial."'";