如何自定義WordPress的內部功能，如adjacent_post_link（）

Question

我需要定製WordPress上的previous_post_link()和next_post_link()。

舉例來說，我想縮小永久鏈接，比如「需要學習的前5種編程語言」到「前5個編程...」。

負責創建位於鏈路isadjacent_post_link()功能在wp-includes/link-template.php

Answer 1

的next_post_link()和previous_post_link()功能都配備了自定義選項。 http://codex.wordpress.org/Function_Reference/next_post_link。在閱讀並學習函數的可接受參數後，測試以查看是否可以將php函數傳遞給選項，如substr（）。

<?php next_post_link('%link',substr('%title',20),FALSE);?> 

'％link'和'％title'是後鏈接和標題的簡碼。

讓我們知道它是否工作。

Answer 2

要爲帖子創建自定義相鄰鏈接，我可以使用過濾器掛鉤next_post_link和previos_post_link;

在functions.php中：

function shrink_previous_post_link($format, $link){ 
    $in_same_cat = false; 
    $excluded_categories = ''; 
    $previous = true; 
    $link='%title'; 
    $format='« %link'; 


    if ($previous && is_attachment()) 
     $post = & get_post($GLOBALS['post']->post_parent); 
    else 
     $post = get_adjacent_post($in_same_cat, $excluded_categories, $previous); 

    if (!$post) 
     return; 

    $title = $post->post_title; 

    if (empty($post->post_title)) 
     $title = $previous ? __('Previous Post') : __('Next Post'); 

    $rel = $previous ? 'prev' : 'next'; 

    //Save the original title 
    $original_title = $title; 

    //create short title, if needed 
    if (strlen($title)>40){ 
     $first_part = substr($title, 0, 23); 
     $last_part = substr($title, -17); 
     $title = $first_part."...".$last_part; 
    } 

    $string = '<a href="'.get_permalink($post).'" rel="'.$rel.'" title="'.$original_title.'">'; 
    $link = str_replace('%title', $title, $link); 
    $link = $string . $link . '</a>'; 

    $format = str_replace('%link', $link, $format); 

    echo $format; 
} 

function shrink_next_post_link($format, $link){ 
    $in_same_cat = false; 
    $excluded_categories = ''; 
    $previous = false; 
    $link='%title'; 
    $format='%link &raquo;'; 

    if ($previous && is_attachment()) 
     $post = & get_post($GLOBALS['post']->post_parent); 
    else 
     $post = get_adjacent_post($in_same_cat, $excluded_categories, $previous); 

    if (!$post) 
     return; 

    $title = $post->post_title; 

    if (empty($post->post_title)) 
     $title = $previous ? __('Previous Post') : __('Next Post'); 

    $rel = $previous ? 'prev' : 'next'; 

    //Save the original title 
    $original_title = $title; 

    //create short title, if needed 
    if (strlen($title)>40){ 
     $first_part = substr($title, 0, 23); 
     $last_part = substr($title, -17); 
     $title = $first_part."...".$last_part; 
    } 

    $string = '<a href="'.get_permalink($post).'" rel="'.$rel.'" title="'.$original_title.'">'; 
    $link = str_replace('%title', $title, $link); 
    $link = $string . $link . '</a>'; 

    $format = str_replace('%link', $link, $format); 

    echo $format; 
} 

add_filter('next_post_link', 'shrink_next_post_link',10,2); 
add_filter('previous_post_link', 'shrink_previous_post_link',10,2); 

這一切我需要做的。謝謝！