WordPress 代码实现自定义分页函数

//分页函数
function pagenavi( $before = '', $after = '', $p = 3 ) {
    if ( is_singular() ) return;
    global $wp_query, $paged;
    $max_page = $wp_query->max_num_pages;
    if ( $max_page == 1 ) return;
    if ( emptyempty( $paged ) ) $paged = 1;
    echo $before.'<nav id="pagenavi">'."\n";
    if ( $paged > 1 ) p_link( $paged - 1, '上页', '上页' );
    if ( $paged > $p + 1 ) p_link( 1, '第一页' );
    if ( $paged > $p + 2 ) echo '<span class="pages">...</span>';
    for( $i = $paged - $p; $i <= $paged + $p; $i++ ) {
        if ( $i > 0 && $i <= $max_page ) $i == $paged ? print "<span class='page-numbers current'>{$i}</span>" : p_link( $i );
    }
    if ( $paged < $max_page - $p - 1 ) echo '<span class="pages">...</span>';
    if ( $paged < $max_page - $p ) p_link( $max_page, '最后一页' );
    if ( $paged < $max_page ) p_link( $paged + 1,'下页', '下页' );
    echo '</nav>'.$after."\n";
}
function p_link( $i, $title = '', $linktype = '' ) {
    if ( $title == '' ) $title = "第 {$i} 页";
    if ( $linktype == '' ) { $linktext = $i; } else { $linktext = $linktype; }
    echo "<a class='page-numbers' href='", esc_HTML( get_pagenum_link( $i ) ), "' title='{$title}'>{$linktext}</a>";
}