WordPress小部件输出不需要的数字

Question

I made a WordPress widget that is only supposed to display an image but is displaying a number also. I don't know why this happens.

Widget output code:

public function widget( $args, $instance ) {
    ?>
        <img src="<?= $instance['image'] ?>" alt="" class="img-responsive">
    <?php
}

Widget area it's in:

<div class="spotlight">
    <?= dynamic_sidebar('header') ?>
</div>

Unwanted output (the image is correct but it also prints a "1"):

Any help on how to fix this?

Answer 1

Change your code to:

<div class="spotlight">
    <?php dynamic_sidebar('header'); ?>
</div>

The <?= short open tag means <?php echo and dynamic_sidebar function returns true (which is converted to number in your case) if widget sidebars exists.