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Posted by Kevin Newman on 11/29/05 17:33
Sean wrote:
> Namespaces and PHP are certainly an issue, some of the things you wrote
> I have never heard of before, like require_once being bugged.
>
> Pear is a good example of how namespaces should be done but I would
> suggest an even simpler solution.
>
> Say you have a folder structure like:
>
>> classes
>
>>> XML
>>>> Parser.inc.php
>>>> Transformer.inc.php
>
>>> DB
>>>> Mysql.inc.php
>
>>> FILE_SYSTEM
>>>> File.inc.php
>
> They you should have an auto load function like:
>
> function __autoload( $class )
> {
> $load = strtolower( str_replace( "_", "/classes/", $class ) ) .
> ".inc.php";
> if( file_exists( $load ) )
> {
> include_once( $load );
> }
> else
> {
> die( "Can't find a file for class: $class \n" );
> }
> }
>
> Now you can have
>
> $obj = new XML_Parser();
>
> (example adapter from http://www.wiki.cc/php/Overload_autoload).
>
> This makes things allot easier. The drawback is it is not php4
> compatible.
>
I thought of that, but doesn't it try to load "XML_Parser" from within
the class file, instead of just "Parser"? In some cases that would lead
to to huge class names (and a lot of typing).
Also, I've read that there is a performance problem with __autoload -
has that been taken care of? (I read that php 5.1 improved some of the
performance issues with magic functions.)
I really wish the php guys would just implement at least class level
namespaces (they already have a patch).
Kevin N.
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