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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 |
|---|---|
| 863 | } |
| 864 | /** |
| 865 | * Filter the HTML output of individual page number links. |
| 866 | * |
| 867 | * @since 3.6.0 |
| 868 | * |
| 869 | * @param string $link The page number HTML output. |
| 870 | * @param int $i Page number for paginated posts' page links. |
| 871 | */ |
| 872 | $link = apply_filters( 'wp_link_pages_link', $link, $i ); |
| 873 | |
| 874 | // Use the custom links separator beginning with the second link. |
| 875 | $output .= ( 1 === $i ) ? ' ' : $r['separator']; |
| 876 | $output .= $link; |
| 877 | } |
| 878 | $output .= $r['after']; |
| 879 | } elseif ( $more ) { |
| 880 | $output .= $r['before']; |
| 881 | $prev = $page - 1; |
| 882 | if ( $prev > 0 ) { |
| 883 | $link = _wp_link_page( $prev ) . $r['link_before'] . $r['previouspagelink'] . $r['link_after'] . '</a>'; |
| 884 | |
| 885 | /** This filter is documented in wp-includes/post-template.php */ |
| 886 | $output .= apply_filters( 'wp_link_pages_link', $link, $prev ); |
| 887 | } |
| 888 | $next = $page + 1; |
| 889 | if ( $next <= $numpages ) { |
| 890 | if ( $prev ) { |
| 891 | $output .= $r['separator']; |
| 892 | } |
| 893 | $link = _wp_link_page( $next ) . $r['link_before'] . $r['nextpagelink'] . $r['link_after'] . '</a>'; |
| 894 | |
| 895 | /** This filter is documented in wp-includes/post-template.php */ |
| 896 | $output .= apply_filters( 'wp_link_pages_link', $link, $next ); |
| 897 | } |
| 898 | $output .= $r['after']; |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | /** |
| 903 | * Filter the HTML output of page links for paginated posts. |
| 904 | * |
| 905 | * @since 3.6.0 |