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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 842 | } |
| 843 | /** |
| 844 | * Filter the HTML output of individual page number links. |
| 845 | * |
| 846 | * @since 3.6.0 |
| 847 | * |
| 848 | * @param string $link The page number HTML output. |
| 849 | * @param int $i Page number for paginated posts' page links. |
| 850 | */ |
| 851 | $link = apply_filters( 'wp_link_pages_link', $link, $i ); |
| 852 | |
| 853 | // Use the custom links separator beginning with the second link. |
| 854 | $output .= ( 1 === $i ) ? ' ' : $r['separator']; |
| 855 | $output .= $link; |
| 856 | } |
| 857 | $output .= $r['after']; |
| 858 | } elseif ( $more ) { |
| 859 | $output .= $r['before']; |
| 860 | $prev = $page - 1; |
| 861 | if ( $prev > 0 ) { |
| 862 | $link = _wp_link_page( $prev ) . $r['link_before'] . $r['previouspagelink'] . $r['link_after'] . '</a>'; |
| 863 | |
| 864 | /** This filter is documented in wp-includes/post-template.php */ |
| 865 | $output .= apply_filters( 'wp_link_pages_link', $link, $prev ); |
| 866 | } |
| 867 | $next = $page + 1; |
| 868 | if ( $next <= $numpages ) { |
| 869 | if ( $prev ) { |
| 870 | $output .= $r['separator']; |
| 871 | } |
| 872 | $link = _wp_link_page( $next ) . $r['link_before'] . $r['nextpagelink'] . $r['link_after'] . '</a>'; |
| 873 | |
| 874 | /** This filter is documented in wp-includes/post-template.php */ |
| 875 | $output .= apply_filters( 'wp_link_pages_link', $link, $next ); |
| 876 | } |
| 877 | $output .= $r['after']; |
| 878 | } |
| 879 | } |
| 880 | |
| 881 | /** |
| 882 | * Filter the HTML output of page links for paginated posts. |
| 883 | * |
| 884 | * @since 3.6.0 |