Need more information about the project.
As far as those types of website needs more security to handle BOTs. I will recommend you to implement it in Java, but I will provide you a robust java host for $70/year (with weekly backup)
But if you insist in PHP, I am OK with that.
Expert in Java EE(Restful, JAXWS, Axis, EJB, JPA. ..), JSF (using PrimeFaces, RichFaces, ADF, ...) , Spring, Maven, Database, Web Applications, Familiar with Mobile App (Android, iOS), Please feel free to negotiate more.