Advanced Embedding

PHP'S EMBEDED SAPI CAN PROVIDE MORE THAN just a means to synchronously load and execute script files. By understanding how the pieces of PHP's execution model fit together, it's possible to slide in and out of PHP's environment during a given request, and even give a script the power to call back into your host application. This chapter will cover the means to take advantage of the I/O hooks provided by the SAPI layer, and expand on the execution model you've already started to explore as part of previous topics.