[Bjork]

I want to start working online as a PHP specialist and I have researched a couple of freelance websites and found the following as the best; Freelancer, Guru, Odesk and Elance. Between the four, which one should I register? I want to earn atleast 1500 US Dollars monthly.

[SEO]

  If I can earn USD 1500 online monthly, I will never need an offline job anymore.
 About your question: "Between the four, which one should I register?", my answer is: "Register in all of them and register everywhere, because in this way, your chances are better!"

[viiviemilia]

1500 dollars monthly is no big deal, you can get that but it will be a little hard in the beginning, but don't give up. I have worked in Odesk and I like it, very user friendly and I recommend it. 

[Barbel]

Freelancer is too much of a struggle, It has many freelancers competing and I don't like its user-interface, I also recommend Odesk. Try bidding cheaply at first, once you get good feedback and reviews, you can increase your rate.

[Alexa]

Barbel, you gave us a good post! Karma + for you! Thank you!

[MSL]

Freelancer is too much of a struggle, It has many freelancers competing and I don't like its user-interface, I also recommend Odesk. Try bidding cheaply at first, once you get good feedback and reviews, you can increase your rate.

Well... market economy.