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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code | 
|---|---|
| 1714 |                } | 
| 1715 |           } else { | 
| 1716 |                $rules .= "RewriteCond %{REQUEST_FILENAME} !-f\n" . | 
| 1717 |                     "RewriteCond %{REQUEST_FILENAME} !-d\n" . | 
| 1718 |                     "RewriteRule . {$home_root}{$this->index} [L]\n"; | 
| 1719 |           } | 
| 1720 |  | 
| 1721 |           $rules .= "</IfModule>\n"; | 
| 1722 |  | 
| 1723 |           $rules = apply_filters('mod_rewrite_rules', $rules); | 
| 1724 |           $rules = apply_filters('rewrite_rules', $rules);  // Deprecated | 
| 1725 |  | 
| 1726 |           return $rules; | 
| 1727 |      } | 
| 1728 |  | 
| 1729 |      /** | 
| 1730 |       * Retrieve IIS7 URL Rewrite formatted rewrite rules to write to web.config file. | 
| 1731 |       * | 
| 1732 |       * Does not actually write to the web.config file, but creates the rules for |