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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 |
|---|---|
| 814 | |
| 815 | /** |
| 816 | * Filter the HTML output of page links for paginated posts. |
| 817 | * |
| 818 | * @since 3.6.0 |
| 819 | * |
| 820 | * @param string $output HTML output of paginated posts' page links. |
| 821 | * @param array $args An array of arguments. |
| 822 | */ |
| 823 | $html = apply_filters( 'wp_link_pages', $output, $args ); |
| 824 | |
| 825 | if ( $r['echo'] ) { |
| 826 | echo $html; |
| 827 | } |
| 828 | return $html; |
| 829 | } |
| 830 | |
| 831 | /** |
| 832 | * Helper function for wp_link_pages(). |