您可以尝试以下代码段：

/**
 * Shortcode for a series of elevating image files, excluding a range
 *
 * @link http://wordpress.stackexchange.com/a/151408/26350
 */

add_shortcode( \'episode\', \'episode_shortcode\' );

function episode_shortcode( $atts = array(), $content = \'\' )
{
    //-----------------------
    // Settings:
    //
    $path   = \'/path/to/files\';
    $ext    = \'jpg\';
    //-----------------------

    // Shortcode input:
    $atts = shortcode_atts(
        array( \'num\' => 0, \'title\' => \'\', \'images\' => \'\' ), 
        $atts, 
        \'episode_shortcode\' 
    );

    // Sanitize input:
    $images = esc_attr( $atts[\'images\'] );
    $title  = esc_attr( $atts[\'title\'] );
    $num    = (int) $atts[\'num\'];

    // Init:
    $html   = \'\';    
    $ranges = explode( \',\', $images );

    // Loop over input ranges:    
    foreach( $ranges as $range )
    {
        $rng = explode( \'-\', $range );

        if( count( $rng ) == 2 )
        {
            $from = (int) trim( $rng[0] );
            $to   = (int) trim( $rng[1] );

            foreach( range( $from, $to ) as $i )
            {
                 $html .= sprintf( \'<img src="%s/%d/%s.%s" alt="%s"/>\', 
                     $path,
                     $num,
                     $i, 
                     $ext,
                     $title 
                 );
            }
        }
    } 

    return $html;
}