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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 |
|---|---|
| 657 | |
| 658 | $output = ''; |
| 659 | if ( $multipage ) { |
| 660 | if ( 'number' == $next_or_number ) { |
| 661 | $output .= $before; |
| 662 | for ( $i = 1; $i <= $numpages; $i++ ) { |
| 663 | $link = $link_before . str_replace( '%', $i, $pagelink ) . $link_after; |
| 664 | if ( $i != $page || ! $more && 1 == $page ) |
| 665 | $link = _wp_link_page( $i ) . $link . '</a>'; |
| 666 | $link = apply_filters( 'wp_link_pages_link', $link, $i ); |
| 667 | $output .= $separator . $link; |
| 668 | } |
| 669 | $output .= $after; |
| 670 | } elseif ( $more ) { |
| 671 | $output .= $before; |
| 672 | $i = $page - 1; |
| 673 | if ( $i ) { |
| 674 | $link = _wp_link_page( $i ) . $link_before . $previouspagelink . $link_after . '</a>'; |
| 675 | $link = apply_filters( 'wp_link_pages_link', $link, $i ); |
| 676 | $output .= $separator . $link; |
| 677 | } |
| 678 | $i = $page + 1; |
| 679 | if ( $i <= $numpages ) { |
| 680 | $link = _wp_link_page( $i ) . $link_before . $nextpagelink . $link_after . '</a>'; |
| 681 | $link = apply_filters( 'wp_link_pages_link', $link, $i ); |
| 682 | $output .= $separator . $link; |
| 683 | } |
| 684 | $output .= $after; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | $output = apply_filters( 'wp_link_pages', $output, $args ); |
| 689 | |
| 690 | if ( $echo ) |