我通过创建两个要拆分的函数来解决这个问题the_content() 在前后函数中：

class MyClass
{
    /**
     * Echo the content before the <!--more--> tag
     */
    public static function getContentBeforeMore()
    {
        global $more;
        $more = false;
        the_content(false);
        $more = true;
    }

    /**
     * Echo the content after the <!--more--> tag
     */
    public static function getContentAfterMore($removeMoreTag = true)
    {
        $content = get_the_content(null, true);
        $content = apply_filters( \'the_content\', $content );
        $content = str_replace( \']]>\', \']]&gt;\', $content );
        // Remove the empty paragraph with the <span id="more-.."></span>-tag:
        if($removeMoreTag)
        {
            $content = preg_replace(\'/<p><span id="more-\\d+"><\\/span><\\/p>/m\', \'\', $content);
        }
        echo $content;
    }
}

<p class="intro"><?php MyClass::getContentBeforeMore(); ?></p>

... some other styling, like date or something ...

<?php MyClass::getContentAfterMore(); ?>