对于那些正在寻找不使用第一个图像功能而保持图像等老练的摘录的人，下面是代码

    function pietergoosen_custom_wp_trim_excerpt($text) {
global $post;
$raw_excerpt = $text;
    if ( \'\' == $text ) {

        $text = get_the_content(\'\');
        $text = strip_shortcodes( $text );
        $text = apply_filters(\'the_content\', $text);
        $text = str_replace(\']]>\', \']]>\', $text);

            //Add the allowed HTML tags separated by a comma.
            $allowed_tags = array(
            \'head\', \'title\', \'base\', \'link\', \'meta\', \'style\', \'script\', \'noscript\', \'body\', \'section\', \'nav\',
            \'article\', \'aside\', \'h1\', \'h2\', \'h3\', \'h4\', \'h5\', \'h6\', \'header\', \'footer\', \'address\', \'main\', \'p\', \'hr\',
            \'pre\', \'blockquote\', \'ol\', \'ul\', \'li\', \'dl\', \'dt\', \'dd\', \'figure\', \'figcaption\', \'div\', \'a\', \'em\', \'strong\',
            \'small\', \'s\', \'cite\', \'q\', \'dfn\', \'abbr\', \'data\', \'time\', \'code\', \'var\', \'samp\', \'kbd\', \'sub\', \'sup\', \'i\', \'b\',
            \'u\', \'mark\', \'ruby\', \'rt\', \'rp\', \'bdi\', \'bdo\', \'span\', \'br\', \'wbr\', \'ins\', \'del\', \'img\', \'iframe\', \'embed\',
            \'object\', \'param\', \'video\' ,\'audio\', \'source\', \'track\', \'canvas\', \'map\', \'area\', \'svg\', \'math\', \'table\',
            \'caption\', \'colgroup\', \'col\', \'tbody\', \'thead\', \'tfoot\', \'tr\', \'td\', \'th\', \'form\', \'fieldset\', \'legend\', \'label\',
            \'input\', \'button\', \'select\', \'datalist\', \'optgroup\', \'option\', \'textarea\', \'keygen\', \'output\', \'progress\', \'meter\',
            \'details\', \'summary\', \'menuitem\', \'menu\'
            );

            $tag_string = \'<\' . implode(\'><\', $allowed_tags) . \'>\';

        $text = strip_tags($text, $tag_string);

        //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\', $text, $tokens);

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

                if ($count >= $excerpt_word_count && preg_match(\'/[\\?\\.\\!]\\s*$/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;
            }

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

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

            $pos = strrpos($text, \'</\');

        // Add \'Read more\' text inside last HTML tag
        $text = substr_replace($text, $excerpt_end, $pos, 0);

    }
    return apply_filters(\'wp_trim_excerpt\', $text, $raw_excerpt);
}

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