I was just wondering: PHP is such a good robust thing for make quick web applications but they don't have a donation box , neither are they selling shirts or mugs etc. They also don't have a "pro" solution to be bought and use so how do their developers get paid? I know it's open source and a lot of intelligent are behind it contributing to it but someone must be there to check and balance and paying the hosting etc. This open source organization is a bit different than others: some have hosting plans , paid tutorials etc. I only find Zend doing selling and I don't know if zend is the company behind PHP or is PHP behind Zend ?
Zend (the company behind PHP) engages in several commercial activities:
Software sales: Zend Studio, Zend Server
Training: Zend Certification, Zend Framework Certification
Consultation, and more. See zend.com for details.