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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 | $params = wp_parse_args( $args, $defaults ); |
| 815 | |
| 816 | /** |
| 817 | * Filter the arguments used in retrieving page links for paginated posts. |
| 818 | * |
| 819 | * @since 3.0.0 |
| 820 | * |
| 821 | * @param array $params An array of arguments for page links for paginated posts. |
| 822 | */ |
| 823 | $r = apply_filters( 'wp_link_pages_args', $params ); |
| 824 | |
| 825 | $output = ''; |
| 826 | if ( $multipage ) { |
| 827 | if ( 'number' == $r['next_or_number'] ) { |
| 828 | $output .= $r['before']; |
| 829 | for ( $i = 1; $i <= $numpages; $i++ ) { |
| 830 | $link = $r['link_before'] . str_replace( '%', $i, $r['pagelink'] ) . $r['link_after']; |
| 831 | if ( $i != $page || ! $more && 1 == $page ) { |
| 832 | $link = _wp_link_page( $i ) . $link . '</a>'; |