One of the weaknesses of PHP is that it isn’t doesn’t perform to well when used to develop computationally intensive tasks. Sure, its great for even the most complex of web applications, but is often skipped over in preference of another language for when it comes to computing.
An extension for PHP called QB, remedies this problem “by translating Zend opcodes and executing them through a statically typed virtual machine” resulting in a significant gain in performance even for complex tasks such as pixel-level image manipulation.
If you are new to PHP though, barely understanding the array chunk function, dabbling with PHP+QB is not advised and would be akin to handing your platinum credit card over to a teenager for use; perfect recipe for a disaster. Advanced programmers could benefit from this though it is recommended that you have a pretty fast system once you start compiling since compiling QB from source code is quite memory extensive, requiring at least 2 gigabytes of memory.