[php] Which one is the best PDF-API for PHP?

The Zend Framework's Zend_Pdf is really good. It's on par with pdflib in terms of control of output and complexity and is more portable because its a pure php solution. That said, its slower and uses more memory than pdflib. Pecl modules are always more efficient than a php solution.

DOMPdf is the easiest way to make a pdf quickly. Like Mike said, feed it html and it outputs a pdf. Under the hood, it has the option to use either r&ospdf or pdflib as the rendering engine.