我最近读到this awesome post 我需要帮助，弄清楚如何只在有更多内容要显示的帖子上显示“阅读更多”链接。目前，它显示在每个帖子上，即使是一行很短的帖子。如果您有任何帮助，我将不胜感激，我基本上只是复制/粘贴了Pieter的代码，并添加了一个小的内容：

// Begin Excerpt Code
function wpse_allowedtags() {
    // Add custom tags to this string
        return \'<script>,<style>,<br>,<em>,<i>,<ul>,<ol>,<li>,<a>,<p>,<img>,<video>,<audio>\'; 
    }

if ( ! function_exists( \'wpse_custom_wp_trim_excerpt\' ) ) : 

    function wpse_custom_wp_trim_excerpt($wpse_excerpt) {
    $raw_excerpt = $wpse_excerpt;
        if ( \'\' == $wpse_excerpt ) {

            $wpse_excerpt = get_the_content(\'\');
            $wpse_excerpt = strip_shortcodes( $wpse_excerpt );
            $wpse_excerpt = apply_filters(\'the_content\', $wpse_excerpt);
            $wpse_excerpt = str_replace(\']]>\', \']]&gt;\', $wpse_excerpt);
            $wpse_excerpt = strip_tags($wpse_excerpt, wpse_allowedtags()); /*IF you need to allow just certain tags. Delete if all tags are allowed */

            //Set the excerpt word count and only break after sentence is complete.
                $excerpt_word_count = 75;
                $excerpt_length = apply_filters(\'excerpt_length\', $excerpt_word_count); 
                $tokens = array();
                $excerptOutput = \'\';
                $count = 0;

                // Divide the string into tokens; HTML tags, or words, followed by any whitespace
                preg_match_all(\'/(<[^>]+>|[^<>\\s]+)\\s*/u\', $wpse_excerpt, $tokens);

                foreach ($tokens[0] as $token) { 

                    if ($count >= $excerpt_length && preg_match(\'/[\\,\\;\\?\\.\\!]\\s*$/uS\', $token)) { 
                    // Limit reached, continue until , ; ? . or ! occur at the end
                        $excerptOutput .= trim($token);
                        break;
                    }

                    // Add words to complete sentence
                    $count++;

                    // Append what\'s left of the token
                    $excerptOutput .= $token;
                }

            $wpse_excerpt = trim(force_balance_tags($excerptOutput));

                $excerpt_end = \' <a href="\'. esc_url( get_permalink() ) . \'">\' . \'&nbsp;&raquo;&nbsp;\' . sprintf(__( \'Read more about: %s &nbsp;&raquo;\', \'wpse\' ), get_the_title()) . \'</a>\'; 
                $excerpt_more = apply_filters(\'excerpt_more\', \' \' . $excerpt_end); 

                //$pos = strrpos($wpse_excerpt, \'</\');
                //if ($pos !== false)
                // Inside last HTML tag
                //$wpse_excerpt = substr_replace($wpse_excerpt, $excerpt_end, $pos, 0); /* Add read more next to last word */
                //else
                // After the content
                $wpse_excerpt .= $excerpt_more; /*Add read more in new paragraph */

            return $wpse_excerpt;   

        }
        return apply_filters(\'wpse_custom_wp_trim_excerpt\', $wpse_excerpt, $raw_excerpt);
    }

endif; 

remove_filter(\'get_the_excerpt\', \'wp_trim_excerpt\');
add_filter(\'get_the_excerpt\', \'wpse_custom_wp_trim_excerpt\'); 

// Replaces the excerpt "more" text by a link
function new_excerpt_more($more) {
       global $post;
    return \'<br /><br /><a class="moretag btn-lg" href="\'. get_permalink($post->ID) . \'"> Read more</a>\';
}
add_filter(\'excerpt_more\', \'new_excerpt_more\');
// End Excerpt Code