您可以将其包装在类中。

下面是一个示例：

class WPSE_Answers_Counting 
{
    private $instance_answers      = 0;
    private $instance_prev_answers = 0;
    private $instance_answer       = 0;

    public function init()
    {
        add_shortcode( \'answers\', [ $this, \'answers_shortcode\' ] );
        add_shortcode( \'ans\',     [ $this, \'answer_shortcode\'  ] );         
    }

    public function answers_shortcode( $atts = [], $content = null )
    {
        // Output with [answers] counting   
        return sprintf(
            "<div class=\'answers-wrapper\'>
                <div id=\'answers-%d\' class=\'answers\'>
                    %s
                </div>
            </div>",
            $this->instance_answers++,
            do_shortcode( $content )
        );
    }

    public function answer_shortcode( $atts = [], $content = null )
    {   
        // Reset single [ans] counting after each  [answers]
        if( $this->instance_prev_answers != $this->instance_answers )
            $this->instance_answer = 1;

        // Output with [ans] counting   
        $out = sprintf(  
            "<dl class=\'answer-item\'>
                <dd class=\'wp-caption-text answer-caption\'>
                    <a href=\'?ins=%d&ans=%d\'>%s</a> 
                </dd>
             </dl>",
            $this->instance_answers,
            $this->instance_answer++,
            esc_html( $content )
        );

        // Update the previous [answers] instance count
        $this->instance_prev_answers = $this->instance_answers;

        return $out;
    }

} // end class

创建一个对象实例，然后执行以下短代码破坏：

[answers][ans]a1[/ans][ans]b1[/ans][ans]c1[/ans][/answers]
[answers][ans]a2[/ans][ans]b2[/ans][ans]c2[/ans][/answers]
[answers][ans]a3[/ans][ans]b3[/ans][ans]c3[/ans][/answers]

将输出为：

<div class=\'answers-wrapper\'>
    <div id=\'answers-0\' class=\'answers\'>
        <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=1&ans=1\'>a1</a> 
            </dd>
         </dl>
         <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=1&ans=2\'>b1</a> 
            </dd>
         </dl>
         <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=1&ans=3\'>c1</a> 
            </dd>
         </dl>
    </div>
</div><br />
<div class=\'answers-wrapper\'>
    <div id=\'answers-1\' class=\'answers\'>
        <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=2&ans=1\'>a2</a> 
            </dd>
        </dl>
        <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=2&ans=2\'>b2</a> 
            </dd>
        </dl>
        <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=2&ans=3\'>c2</a> 
            </dd>
         </dl>
    </div>
</div><br />
<div class=\'answers-wrapper\'>
    <div id=\'answers-2\' class=\'answers\'>
        <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=3&ans=1\'>a3</a> 
            </dd>
        </dl>
        <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=3&ans=2\'>b3</a> 
            </dd>
         </dl>
         <dl class=\'answer-item\'>
            <dd class=\'wp-caption-text answer-caption\'>
                <a href=\'?ins=3&ans=3\'>c3</a> 
            </dd>
         </dl>
    </div>
</div>

使用（希望如此）正确的实例数计算您所追求的目标。

更新：

您可能需要重置[ans] 每次之后计数[answers], 所以我调整了课程以支持这一点。

以下是静态版本：

add_shortcode( \'answers\', \'WPSE_Answers_Counting::answers_shortcode\' );
add_shortcode( \'ans\',     \'WPSE_Answers_Counting::answer_shortcode\'  );         

class WPSE_Answers_Counting 
{
    private static $instance_answers      = 0;
    private static $instance_prev_answers = 0;
    private static $instance_answer       = 0;

    public static function answers_shortcode( $atts = [], $content = null )
    {
        return sprintf(
            "<div class=\'answers-wrapper\'>
                <div id=\'answers-%d\' class=\'answers\'>
                    %s
                </div>
            </div>",
            self::$instance_answers++,
            do_shortcode( $content )
        );
    }

    public static function answer_shortcode( $atts = [], $content = null )
    {   
        // Reset single [ans] coutning
        if( self::$instance_prev_answers != self::$instance_answers )
            self::$instance_answer = 1;

        $out = sprintf(  
            "<dl class=\'answer-item\'>
                <dd class=\'wp-caption-text answer-caption\'>
                    <a href=\'?ins=%d&ans=%d\'>%s</a> 
                </dd>
             </dl>",
            self::$instance_answers,
            self::$instance_answer++,
            esc_html( $content )
        );

        // Update the previous instance 
        self::$instance_prev_answers = self::$instance_answers;

        return $out;
    }

} // end class