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| -rw-r--r-- | doc/Plugins.md | 36 |
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diff --git a/doc/Plugins.md b/doc/Plugins.md index 80379c478..aec4c8399 100644 --- a/doc/Plugins.md +++ b/doc/Plugins.md @@ -207,4 +207,38 @@ Now let's add our functions to create and store preference settings. -
\ No newline at end of file +***Advanced Plugins*** + +Sometimes your plugins want to provide a range of new functionality which isn't provided at all or is clumsy to provide using hooks. In this case your plugin can also act as a 'module'. A module in our case refers to a structured webpage handler which responds to a given URL. Then anything which accesses that URL will be handled completely by your plugin. + +The key to this is to create a simple function named pluginname_module() which does nothing. + + function randplace_module() { return; } + +Once this function exists, the URL https://yoursite/randplace will access your plugin as a module. Then you can define functions which are called at various points to build a webpage just like the modules in the mod/ directory. The typical functions and the order which they are called is + + modulename_init($a) // (e.g. randplace_init($a);) called first - if you wish to emit json or xml, + // you should do it here, followed by killme() which will avoid the default action of building a webpage + modulename_aside($a) // Often used to create sidebar content + modulename_post($a) // Called whenever the page is accessed via the "post" method + modulename_content($a) // called to generate the central page content. This function should return a string + // consisting of the central page content. + +Your module functions have access to the URL path as if they were standalone programs in the Unix operating system. For instance if you visit the page + + https://yoursite/randplace/something/somewhere/whatever + +we will create an argc/argv list for use by your module functions + + $x = argc(); $x will be 4, the number of path arguments after the sitename + + for($x = 0; $x < argc(); $x ++) + echo $x . ' ' . argv($x); + + + 0 randplace + 1 something + 2 somewhere + 3 whatever + + |