.. .Advanced PHP Programming www.it-ebooks.info www.it-ebooks.info Advanced PHP Programming A practical guide to developing large-scale Web sites and applications with PHP George Schlossnagle... implementations PHP in the Enterprise When I started programming PHP professionally in 1999, PHP was just starting its emergence as more than a niche scripting language for hobbyists.That was the time of PHP. .. The PHP Request Life Cycle 492 The SAPI Layer 494 The PHP Core 496 The PHP Extension API 497 The Zend Extension API 498 How All the Pieces Fit Together 500 Further Reading 502 21 Extending PHP: