Data Conversion

Summary

In this chapter you looked at the internal representation of PHP variables. You learned to distinguish types, set and retrieve values, and add variables into symbol tables and fetch them back out. In the next chapter you'll build on this knowledge by learning how to make copies of a zval, how to destroy them when they're no longer needed, and most importantly, how to avoid making copies when you don't need to.

You'll also take a look at Zend's per-request memory management layer, and examine persistent versus non-persistent allocations. By the end of the next chapter you'll have the solid foundation necessary to begin creating a working extension and experimenting with your own code variations.


The PHP Life Cycle

Variables from the Inside Out

Memory Management

Setting Up a Build Environment

Your First Extension

Returning Values

Accepting Parameters

Working with Arrays and HashTables

The Resource Data Type

PHP4 Objects

PHP5 Objects

Startup, Shutdown, and a Few Points in Between

INI Settings

Accessing Streams

Implementing Streams

Diverting the Stream

Configuration and Linking

Extension Generators

Setting Up a Host Environment

Advanced Embedding

Appendix A. A Zend API Reference

Appendix B. PHPAPI

Appendix C. Extending and Embedding Cookbook

Appendix D. Additional Resources

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Extending and Embedding PHP
Extending and Embedding PHP
ISBN: 067232704X
EAN: 2147483647
Year: 2007
Pages: 175
Authors: Sara Golemon
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