PHP internal documentations (update regularly!)

1. For string serialization to work for binary data
php > $data="a:1:{i:0;S:17:'\x00\x01\x00\x00AAAA\x00\x01\x01\x00\x01\x00\x0B\xBC\xCC';}";

- What does it mean?

First, use \xBC rather for \BC alone

Second, the string must have the form "etc     'string here'  "

2. Php binary entry point is php_binary_init() at line 264 file main/main.c

3. Write php extension: https://devzone.zend.com/303/extension-writing-part-i-introduction-to-php-and-zend/

4. Better resource for extension development: https://www.simonholywell.com/post/2010/09/15-excellent-resources-for-php-extension-development/

- A beginner extacted: https://www.kchodorow.com/blog/2011/08/11/php-extensions-made-eldrich-hello-world/

5. Hacker guide on PHP: http://php.net/manual/en/internals2.php

6. More on extension writting:

What the heck is TSRMLS_CC, anyway?:  http://blog.golemon.com/2006/06/what-heck-is-tsrmlscc-anyway.html

7. Functions and Params internally: http://php.net/manual/en/internals2.funcs.php
A quick note: zend_parse_parameter is available from version 5.5, it behaves like zend_parse_parameters_ex except that instead of reading the arguments from the stack, it receives a single zval to convert, which may be changed in place.
=> So, before that, how could we handle parameter.

8. Hashtables are one of the most important structures used by PHP. They form the basis for 
- arrays, 
- object properties, 
- symbol tables 
- have countless other applications throughout the engine

9. zval accessor macro reference:

10. Maybe thes best once, they introduces best book:
https://omniti.com/seeds/php-extension-development-resources