doc:faq:internals

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doc:faq:internals [2010/04/09 20:39] – add note stasdoc:faq:internals [2017/09/22 13:28] (current) – external edit 127.0.0.1
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-==== PHP Internals FAQ ==== +The FAQ is now part of the [[internals:engine|Zend Engine]] documentation.
-These are questions, often times with answers, for the PHP Internals. This document is temporary until it's polished and finds a home within the PHP Manual sources. Feel free to add questions with or without answers. +
- +
-Note: This is rough, feel free to clean it up. +
- +
-=== C++ === +
-Extensions can be written in C++, you have to add PHP_REQUIRE_CXX to the config.m4 file to make the build system C++-aware though. +
- +
-To allow static builds of the extension one has to mind this: +
- +
-  09:20:43 <johannes_> and ext/extname/php_extname.h has to be a valid C header, not C++, as it's included in internal_functions.c ... +
-  09:22:06 <dsp_> hmm, that's the point.. +
-  09:23:01 <johannes_> you can have your own additional header for C++ suff, but that one has to be C compatible +
- +
- +
-=== Throwing Exceptions on a 64bit Architecture === +
-If throwing exceptions results in a segmentation fault on 64bit systems only, then be sure that you have: +
-  #include "zend_exceptions.h"  +
- +
-(Remark: This header is always needed. The segfault might be caused by the fact, that C defaults the return value and parameters of undefined parameters to int. In cases where pointers and/or long data types are needed this might be wrong so a wrong function call is being made. A good compiler should give a warning. --johannes) +
- +
-=== Not yet categorized === +
-  [11:58am] scoates: what's the difference between zend_hash_[add] and zend_hash_quick_[add] ? +
-  [11:58am] scoates: removal of gofaster loops? (-: +
-  [11:58am] Derick: with the 2nd one you can provide an already calculated hash-list index +
-  [11:58am] Derick: plus some spaces  +
- +
-  [11:59am] scoates: and the hashtable will automatically grow on _add, right? the length passed to init is just a hint? +
-  [11:59am] johannes_: right +
- +
-  [12:00pm] scoates: ok.. last question for now, I think: should I explicitly destroy on RSHUTDOWN, or let the non-persistent flag take care of that? +
-  [12:00pm] johannes_: always cleanup yourself +
-  [12:02pm] Derick: just like mommy told you +
-  [12:02pm] Derick: :) +
- +
-Note here: while MM shutdown will take care of all allocated memory, it won't run any dtors etc., that's why it is important to clean up the resources properly - otherwise external dependencies can be messed up. And of course you'd get leaks reported in the debug mode.  +
doc/faq/internals.1270845599.txt.gz · Last modified: 2017/09/22 13:28 (external edit)

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