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POModule based system in PHP - how to?
 

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  1. POModule based system in PHP - how to?
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    <p>I have a PHP web application where I've made a little module system, that basically works like this:</p> <p>Each module has it's own file, filename can be anything, but does not matter (for the sake of logic I named the filename is the same as the module name). The content of a module could look like this:</p> <pre><code>$MODULE["name"] = "some_module"; $MODULE["description"] = "This module does some things"; $MODULE["required"] = false; $MODULE["module_specific_var"] = some_function_that_returns_some_value(); </code></pre> <p>I have a global $MODULES array where I read all modules into:</p> <pre><code>foreach ($modules_list as $module_filename){ if (isset($MODULE)) unset($MODULE); include($module_path."/".$module_filename); $MODULES[$MODULE["name"]] = $MODULE; } </code></pre> <p>Now this is pretty simple and have been more than enough for my needs... Until now... Now I need a module specific function and that doesn't work with associative arrays (as far as I know of). What I'd like is something along the lines of being able to call <code>$MODULES["name_of_module"]["name_of_module_specific_function"]();</code></p> <p>I know this can be achieved with function references and as long as I use <code>include()</code> for each module, any functions defined in the module files will be available in global space - this may cause naming issues though, so bad idea.</p> <p>Alternatively I make each module a class, something along the lines of:</p> <pre><code>class module_name { var $name = "some_module"; var $description = "This module does some things"; var $required = false; var $module_specific_var = some_function_that_returns_some_value(); function module_specific_function(){ } } </code></pre> <p>Since I've already got a fair bit of code, my question is - is there an alternative to making all the modules class based, which avoids both the problem of name conflicts and allows me to keep the current module system fairly intact?</p>
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    1. USWoodgnome
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    1. COyou shouldn't rely on globals variable http://php.net/manual/en/security.globals.php
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      1. USMarek Sebera
    2. COSo, you want to encapsulate data and methods in a structure of some kind.. Sort of like an "object", if you may.. Now what PHP5 feature could you use for that.. Hmmm.. tricky!
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      1. USAnupam Jain
    3. COWell, if I were you I would rewrite that module-oriented architecture to be object-oriented. One problem of your approach you already named = name collisions and overpopulated global scope. You can defer the problem by using namespaces (new in PHP 5.3), but that will not solve it.
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