The Developer Tutorials Blog has a few helpful hints about getting yourself a freelance PHP job posted today:
The problem with PHP is this: in years gone by it was typically seen as an amateur, hobbyist language. The state of the language at the time didn't exactly either. [...] As a result, many (if not most) of the freelance PHP jobs out there today involve maintaining this code of yesteryear. It's mostly PHP 4, no OOP, terrible coding standards, no thought for best practices and so on.
The list reads more like a "back to fundamentals" listing - three things: practice, advertise and reach out. No tips about fancy resume or making the power moves to climb up and over the competition - it's just the basics of what you need to get started and get your foot wedged firmly in the door.