WordPress函数paginate_links() 自动生成分页导航

描述:

自动生成分页导航

用法:

<?php echo paginate_links( $args ); ?>

参数:

即使整个参数数组被标记为可选,如果不指定所需的参数,函数也不会输出任何内容。

base

(string) (可选) 用于引用url,该url将用于创建分页链接。“http://example.com/all_posts.php%”中的默认值“%”替换为“format”参数(请参见下文)。

默认值: ‘%_%’

format

(string) (可选) 用于分页结构。默认值是’?page=%35;%’,如果使用漂亮的永久对齐,则为’/page/%#%’,其中“%#%”替换为页码。

默认值: ‘?page=%#%’

total

(integer) (可选) 总页数。

默认值: 1

current

(integer) (可选) 当前页码

默认值: 0

show_all

(boolean) (可选) 如果设置为True,则它将显示所有页面,而不是当前页面附近的简短页面列表。默认情况下,“show_all”设置为false,并由“end_size”和“mid_size”参数控制。

默认值: False

end_size

(integer) (可选) 开始列表边和结束列表边上有多少个数字。

默认值: 1

mid_size

(integer) (可选) 当前页两边有多少数字,但不包括当前页。

默认值: 2

prev_next

(boolean) (可选) 是否在列表中包含上一个和下一个链接。

默认值: True

prev_text

(string) (可选) 上一页文本。仅当“prev_next”参数设置为true时才有效。

默认值: __(‘« Previous’)

next_text

(string) (可选) 下一页的文本。仅当“prev_next”参数设置为true时才有效。

默认值: __(‘Next »’)

type

(string) (可选) 控制返回值的格式。可能值为:

  • plain‘ – 用换行符分隔链接的字符串。
  • array‘ – 分页链接列表的数组,提供对显示的完全控制。
  • list‘ – 无序的HTML列表。

默认值: ‘plain’

add_args

(array) (可选) 要添加的查询参数数组。

默认值: false

add_fragment

(string) (可选) 要附加到每个链接的字符串。

默认值: None

before_page_number

(string) (可选) 出现在页码前面的字符串。

默认值: None

after_page_number

(string) (可选) 要在页码后追加的字符串。

默认值: None

示例:

<?php
global $wp_query;

$big = 999999999; // need an unlikely integer

echo paginate_links( array(
	'base' => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ),
	'format' => '?paged=%#%',
	'current' => max( 1, get_query_var('paged') ),
	'total' => $wp_query->max_num_pages
) );
?>

源文件:

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' ) ? intval( 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'          => __( '&laquo; Previous' ),
        'next_text'          => __( 'Next &raquo;' ),
        '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">' . __( '&hellip;' ) . '</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 .= join( "</li>\n\t<li>", $page_links );
            $r .= "</li>\n</ul>\n";
            break;
 
        default:
            $r = join( "\n", $page_links );
            break;
    }
 
    return $r;
}