WordPress函数：paginate_links
一、函数简介
检索存档帖子页面的分页链接。（Retrieves paginated links for archive post pages.）二、函数参数
* @param string|array $args { * Optional. Array or string of arguments for generating paginated links for archives. * * @type string $base Base of the paginated url. Default empty. * @type string $format Format for the pagination structure. Default empty. * @type int $total The total amount of pages. Default is the value WP_Query's * `max_num_pages` or 1. * @type int $current The current page number. Default is 'paged' query var or 1. * @type string $aria_current The value for the aria-current attribute. Possible values are 'page', 'step', 'location', 'date', 'time', 'true', 'false'. Default is 'page'. * @type bool $show_all Whether to show all pages. Default false. * @type int $end_size How many numbers on either the start and the end list edges. * Default 1. * @type int $mid_size How many numbers to either side of the current pages. Default 2. * @type bool $prev_next Whether to include the previous and next links in the list. Default true. * @type string $prev_text The previous page text. Default '« Previous'. * @type string $next_text The next page text. Default 'Next »'. * @type string $type Controls format of the returned value. Possible values are 'plain', * 'array' and 'list'. Default is 'plain'. * @type array $add_args An array of query args to add. Default false. * @type string $add_fragment A string to append to each link. Default empty. * @type string $before_page_number A string to appear before the page number. Default empty. * @type string $after_page_number A string to append after the page number. Default empty. * } * @return string|string[]|void String of page links or array of page links, depending on 'type' argument. * Void if total number of pages is less than 2.三、函数案例
<?php paginate_links( $args = '' ) ?>四、源代码
/**
* Retrieves paginated links for archive post pages.
*
* Technically, the function can be used to create paginated link list for any
* area. The 'base' argument is used to reference the url, which will be used to
* create the paginated links. The 'format' argument is then used for replacing
* the page number. It is however, most likely and by default, to be used on the
* archive post pages.
*
* The 'type' argument controls format of the returned value. The default is
* 'plain', which is just a string with the links separated by a newline
* character. The other possible values are either 'array' or 'list'. The
* 'array' value will return an array of the paginated link list to offer full
* control of display. The 'list' value will place all of the paginated links in
* an unordered HTML list.
*
* The 'total' argument is the total amount of pages and is an integer. The
* 'current' argument is the current page number and is also an integer.
*
* An example of the 'base' argument is "http://example.com/all_posts.php%_%"
* and the '%_%' is required. The '%_%' will be replaced by the contents of in
* the 'format' argument. An example for the 'format' argument is "?page=%#%"
* and the '%#%' is also required. The '%#%' will be replaced with the page
* number.
*
* You can include the previous and next links in the list by setting the
* 'prev_next' argument to true, which it is by default. You can set the
* previous text, by using the 'prev_text' argument. You can set the next text
* by setting the 'next_text' argument.
*
* If the 'show_all' argument is set to true, then it will show all of the pages
* instead of a short list of the pages near the current page. By default, the
* 'show_all' is set to false and controlled by the 'end_size' and 'mid_size'
* arguments. The 'end_size' argument is how many numbers on either the start
* and the end list edges, by default is 1. The 'mid_size' argument is how many
* numbers to either side of current page, but not including current page.
*
* It is possible to add query vars to the link by using the 'add_args' argument
* and see add_query_arg() for more information.
*
* The 'before_page_number' and 'after_page_number' arguments allow users to
* augment the links themselves. Typically this might be to add context to the
* numbered links so that screen reader users understand what the links are for.
* The text strings are added before and after the page number - within the
* anchor tag.
*
* @since 2.1.0
* @since 4.9.0 Added the `aria_current` argument.
*
* @global WP_Query $wp_query WordPress Query object.
* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
*
* @param string|array $args {
* Optional. Array or string of arguments for generating paginated links for archives.
*
* @type string $base Base of the paginated url. Default empty.
* @type string $format Format for the pagination structure. Default empty.
* @type int $total The total amount of pages. Default is the value WP_Query's
* `max_num_pages` or 1.
* @type int $current The current page number. Default is 'paged' query var or 1.
* @type string $aria_current The value for the aria-current attribute. Possible values are 'page',
* 'step', 'location', 'date', 'time', 'true', 'false'. Default is 'page'.
* @type bool $show_all Whether to show all pages. Default false.
* @type int $end_size How many numbers on either the start and the end list edges.
* Default 1.
* @type int $mid_size How many numbers to either side of the current pages. Default 2.
* @type bool $prev_next Whether to include the previous and next links in the list. Default true.
* @type string $prev_text The previous page text. Default '« Previous'.
* @type string $next_text The next page text. Default 'Next »'.
* @type string $type Controls format of the returned value. Possible values are 'plain',
* 'array' and 'list'. Default is 'plain'.
* @type array $add_args An array of query args to add. Default false.
* @type string $add_fragment A string to append to each link. Default empty.
* @type string $before_page_number A string to appear before the page number. Default empty.
* @type string $after_page_number A string to append after the page number. Default empty.
* }
* @return string|string[]|void String of page links or array of page links, depending on 'type' argument.
* Void if total number of pages is less than 2.
*/
function paginate_links( $args = '' ) {
global $wp_query, $wp_rewrite;
// Setting up default values based on the current URL.
$pagenum_link = html_entity_decode( get_pagenum_link() );
$url_parts = explode( '?', $pagenum_link );
// Get max pages and current page out of the current query, if available.
$total = isset( $wp_query->max_num_pages ) ? $wp_query->max_num_pages : 1;
$current = get_query_var( 'paged' ) ? (int) get_query_var( 'paged' ) : 1;
// Append the format placeholder to the base URL.
$pagenum_link = trailingslashit( $url_parts[0] ) . '%_%';
// URL base depends on permalink settings.
$format = $wp_rewrite->using_index_permalinks() && ! strpos( $pagenum_link, 'index.php' ) ? 'index.php/' : '';
$format .= $wp_rewrite->using_permalinks() ? user_trailingslashit( $wp_rewrite->pagination_base . '/%#%', 'paged' ) : '?paged=%#%';
$defaults = array(
'base' => $pagenum_link, // http://example.com/all_posts.php%_% : %_% is replaced by format (below).
'format' => $format, // ?page=%#% : %#% is replaced by the page number.
'total' => $total,
'current' => $current,
'aria_current' => 'page',
'show_all' => false,
'prev_next' => true,
'prev_text' => __( '« Previous' ),
'next_text' => __( 'Next »' ),
'end_size' => 1,
'mid_size' => 2,
'type' => 'plain',
'add_args' => array(), // Array of query args to add.
'add_fragment' => '',
'before_page_number' => '',
'after_page_number' => '',
);
$args = wp_parse_args( $args, $defaults );
if ( ! is_array( $args['add_args'] ) ) {
$args['add_args'] = array();
}
// Merge additional query vars found in the original URL into 'add_args' array.
if ( isset( $url_parts[1] ) ) {
// Find the format argument.
$format = explode( '?', str_replace( '%_%', $args['format'], $args['base'] ) );
$format_query = isset( $format[1] ) ? $format[1] : '';
wp_parse_str( $format_query, $format_args );
// Find the query args of the requested URL.
wp_parse_str( $url_parts[1], $url_query_args );
// Remove the format argument from the array of query arguments, to avoid overwriting custom format.
foreach ( $format_args as $format_arg => $format_arg_value ) {
unset( $url_query_args[ $format_arg ] );
}
$args['add_args'] = array_merge( $args['add_args'], urlencode_deep( $url_query_args ) );
}
// Who knows what else people pass in $args.
$total = (int) $args['total'];
if ( $total < 2 ) {
return;
}
$current = (int) $args['current'];
$end_size = (int) $args['end_size']; // Out of bounds? Make it the default.
if ( $end_size < 1 ) {
$end_size = 1;
}
$mid_size = (int) $args['mid_size'];
if ( $mid_size < 0 ) {
$mid_size = 2;
}
$add_args = $args['add_args'];
$r = '';
$page_links = array();
$dots = false;
if ( $args['prev_next'] && $current && 1 < $current ) :
$link = str_replace( '%_%', 2 === $current ? '' : $args['format'], $args['base'] );
$link = str_replace( '%#%', $current - 1, $link );
if ( $add_args ) {
$link = add_query_arg( $add_args, $link );
}
$link .= $args['add_fragment'];
$page_links[] = sprintf(
'<a class="prev page-numbers" href="%s">%s</a>',
/**
* Filters the paginated links for the given archive pages.
*
* @since 3.0.0
*
* @param string $link The paginated link URL.
*/
esc_url( apply_filters( 'paginate_links', $link ) ),
$args['prev_text']
);
endif;
for ( $n = 1; $n <= $total; $n++ ) :
if ( $n === $current ) :
$page_links[] = sprintf(
'<span aria-current="%s" class="page-numbers current">%s</span>',
esc_attr( $args['aria_current'] ),
$args['before_page_number'] . number_format_i18n( $n ) . $args['after_page_number']
);
$dots = true;
else :
if ( $args['show_all'] || ( $n <= $end_size || ( $current && $n >= $current - $mid_size && $n <= $current + $mid_size ) || $n > $total - $end_size ) ) :
$link = str_replace( '%_%', 1 === $n ? '' : $args['format'], $args['base'] );
$link = str_replace( '%#%', $n, $link );
if ( $add_args ) {
$link = add_query_arg( $add_args, $link );
}
$link .= $args['add_fragment'];
$page_links[] = sprintf(
'<a class="page-numbers" href="%s">%s</a>',
/** This filter is documented in wp-includes/general-template.php */
esc_url( apply_filters( 'paginate_links', $link ) ),
$args['before_page_number'] . number_format_i18n( $n ) . $args['after_page_number']
);
$dots = true;
elseif ( $dots && ! $args['show_all'] ) :
$page_links[] = '<span class="page-numbers dots">' . __( '…' ) . '</span>';
$dots = false;
endif;
endif;
endfor;
if ( $args['prev_next'] && $current && $current < $total ) :
$link = str_replace( '%_%', $args['format'], $args['base'] );
$link = str_replace( '%#%', $current + 1, $link );
if ( $add_args ) {
$link = add_query_arg( $add_args, $link );
}
$link .= $args['add_fragment'];
$page_links[] = sprintf(
'<a class="next page-numbers" href="%s">%s</a>',
/** This filter is documented in wp-includes/general-template.php */
esc_url( apply_filters( 'paginate_links', $link ) ),
$args['next_text']
);
endif;
switch ( $args['type'] ) {
case 'array':
return $page_links;
case 'list':
$r .= "<ul class='page-numbers'>\n\t<li>";
$r .= implode( "</li>\n\t<li>", $page_links );
$r .= "</li>\n</ul>\n";
break;
default:
$r = implode( "\n", $page_links );
break;
}
/**
* Filters the HTML output of paginated links for archives.
*
* @since 5.7.0
*
* @param string $r HTML output.
* @param array $args An array of arguments. See paginate_links()
* for information on accepted arguments.
*/
$r = apply_filters( 'paginate_links_output', $r, $args );
return $r;
}
THE END
