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Naming Conventions {#plugins.naming.conventions}
==================
Plugin files and functions must follow a very specific naming convention
in order to be located by Smarty.
**plugin files** must be named as follows:
> `
> type.name.php
> `
- Where `type` is one of these plugin types:
- function
- modifier
- block
- compiler
- prefilter
- postfilter
- outputfilter
- resource
- insert
- And `name` should be a valid identifier; letters, numbers, and
underscores only, see [php
variables](https://www.php.net/language.variables).
- Some examples: `function.html_select_date.php`, `resource.db.php`,
`modifier.spacify.php`.
**plugin functions** inside the PHP files must be named as follows:
> `smarty_type_name`
- The meanings of `type` and `name` are the same as above.
- An example modifier name `foo` would be
`function smarty_modifier_foo()`.
Smarty will output appropriate error messages if the plugin file it
needs is not found, or if the file or the plugin function are named
improperly.