Vista to Vista - If I want to create a website similar to ebay, should I use Java or PHP as programming language? why?

If I want to create a website similar to ebay, should I use Java or PHP as programming language? why?

Thanks in advance for your answers.

PHP for the site, Java for the backend.
PHP for website as it is the latest . java is best suitable for backend programming
You can make the entire site just by using PHP. Now, if you want to give it that touch of instant interactivity, use Javascript (not the same as Java). Combine the two and you have Ajax which gives you the capability to send information to the server, retrieve data, and display results without refreshing the page.
I find PHP to be easier to use but alot of people don't. Java is more 'user friendly' it's easier to learn. Java is harder to hack. So if you're going to have merchant info on there (paypal, credit card purchasing) then it'd be better. I mean, realistically you could use both. You can always use PHP for the webpage and Java appelets. Java is easier to be separated instead of like with PHP where you have to view it in a browser to see if everything connects up, like database connections and whatnot. I'm pretty sure Ebay uses PHP/CSS.
you can learn everything about it on here good luck,i am only learning myself,http://java.com/en/ peAce.