Naming Conventions
     Plugin files and functions must follow a very specific naming
     convention in order to be located by Smarty.
    
     The 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).
    
     Some examples: function.html_select_date.php,
     resource.db.php,
     modifier.spacify.php.
    
     The plugin functions inside the plugin files must be named as follows:
     
       smarty_type_name()
      
    
     The meanings of type and name are
     the same as before.
    
     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.