Few hours of work for an expert programmer.
You must be able to
1)Work with procedural php code intermixed with html and sql(This is important).
3)Must have good understanding of security aspects and produce php code that is free of sql injection and xss attacks.
4)Can use svn
Type 'php/html/sql mix' as first words in your bid.
You must have excellent work history and experience here.
This work will start today.
Probably as soon as i find the right developer.