On InfoQ.com there's a recent discussion with three members in a virtual panel discussing a common question among businesses all over the world considering PHP - is it ready for the Enterprise?
Although PHP boasts of being the most widely used environment for web application development, it has been traditionally considered as not suitable for the enterprise. InfoQ has conducted a virtual panel regarding the evolution of the language/platform and its suitability in enterprise environments.
The three members of the panel (Zeev Suraski, Rob Nicholson and Derick Rethans) are asked about PHP's interoperability with other platforms, the trend of scripts moving into a JVM, the transitions from the major versions of the language (ex. PHP4 to PHP5), the role more advanced features might play in PHP and if PHP might be considering a move into more functional programming.