Depending on the definition of "job", there might be many PHP jobs out there because WordPress gigs are typically shortlived deliverables (plugins, installs, etc.).
I actually stripped wordpress out as a skillset as I wasn't 100% certain I could match it to PHP programming skills. It did crop up a fair amount though, along with drupal and there's certainly a lot of those jobs about.
Depending on the definition of "job", there might be many PHP jobs out there because WordPress gigs are typically shortlived deliverables (plugins, installs, etc.).