试试这个

function image_thingy($atts) {
    // Merge attribtes from shortcode with defaults
    extract(shortcode_atts(array(
        \'id\' => 1,
        ), $atts));

    // Extract id\'s from shortcode attributes and convert into an array
    $ids = explode(\',\',$atts[\'id\']);

    $output = \'\'; // Variable that holds the shortcode output, at the end this will be returned

    // Loop through ids and fetch urls, and add a comma with a blank space
    foreach($ids as $id){
       $output .= wp_get_attachment_url($id). \', \';
    }
    // remove comma and blank space from the end of $output, and finally return $output
    return rtrim($output,\', \');
}
add_shortcode(\'imagez\', \'image_thingy\');

function image_thingy($atts) {
    extract(shortcode_atts(array(
        \'id\' => 1,
        ), $atts));
    $ids = explode(\',\',$atts[\'id\']);
    $output = \'\';
    foreach($ids as $id){
       $output .= \'<img src="\'. wp_get_attachment_url($id) . \'"/> \';
    }
    return $output;
}
add_shortcode(\'imagez\', \'image_thingy\');