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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 |
|---|---|
| 1776 | /** |
| 1777 | * Filter whether a "hard" rewrite rule flush should be performed when requested. |
| 1778 | * |
| 1779 | * A "hard" flush updates .htaccess (Apache) or web.config (IIS). |
| 1780 | * |
| 1781 | * @since 3.7.0 |
| 1782 | * |
| 1783 | * @param bool $hard Whether to flush rewrite rules "hard". Default true. |
| 1784 | */ |
| 1785 | if ( ! $hard || ! apply_filters( 'flush_rewrite_rules_hard', true ) ) { |
| 1786 | return; |
| 1787 | } |
| 1788 | if ( function_exists( 'save_mod_rewrite_rules' ) ) |
| 1789 | save_mod_rewrite_rules(); |
| 1790 | if ( function_exists( 'iis7_save_url_rewrite_rules' ) ) |
| 1791 | iis7_save_url_rewrite_rules(); |
| 1792 | } |
| 1793 | |
| 1794 | /** |