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+Extending Smarty With Plugins {#plugins}
+=============================
+
+## Table of contents
+
+- [How Plugins Work](./plugins/plugins-howto.md)
+- [Naming Conventions](./plugins/plugins-naming-conventions.md) 
+- [Writing Plugins](./plugins/plugins-writing.md) 
+- [Template Functions](./plugins/plugins-functions.md) 
+- [Modifiers](./plugins/plugins-modifiers.md)
+- [Block Functions](./plugins/plugins-block-functions.md) 
+- [Compiler Functions](./plugins/plugins-compiler-functions.md) 
+- [Prefilters/Postfilters](./plugins/plugins-prefilters-postfilters.md)
+- [Output Filters](./plugins/plugins-outputfilters.md) 
+- [Resources](./plugins/plugins-resources.md)
+- [Inserts](./plugins/plugins-inserts.md)
+
+Version 2.0 introduced the plugin architecture that is used for almost
+all the customizable functionality of Smarty. This includes:
+
+-   functions
+
+-   modifiers
+
+-   block functions
+
+-   compiler functions
+
+-   prefilters
+
+-   postfilters
+
+-   outputfilters
+
+-   resources
+
+-   inserts
+
+With the exception of resources, backwards compatibility with the old
+way of registering handler functions via register\_\* API is preserved.
+If you did not use the API but instead modified the class variables
+`$custom_funcs`, `$custom_mods`, and other ones directly, then you will
+need to adjust your scripts to either use the API or convert your custom
+functionality into plugins.