在主题文件夹中的自定义文件中编写以下代码，并通过functions.php 但在第页[product_first_img] 显示短代码文本，而不是输出。
function gal_first_shortcode($atts, $content = null)
{
extract(shortcode_atts(array(
\'size\' => \'\'
), $atts));
$image_size = \'medium\';
if ($size = !\'\') {
$image_size = $size;
}
$images = get_children(
array(
\'post_parent\' => get_the_ID(),
\'post_type\' => \'attachment\',
\'numberposts\' => 1,
\'post_mime_type\' => \'image\',
\'orderby\' => \'menu_order\',
)
);
if ($images) {
$gallery = \'\';
foreach ($images as $image) {
$gallery .= wp_get_attachment_image($image->ID, $image_size);
}
$gallery .= \'\';
return $gallery;
}
}
add_shortcode(\'product_first_img\', \'gal_first_shortcode\');
SO网友:Saurabh Raut
我在get\\u children（）和foreach循环中更改了数组，使用下面的引用url和代码工作正常。请检查您传递的参数，并像示例中所示那样使用echo语句。
参考url：https://developer.wordpress.org/reference/functions/get_children/
让我知道结果或错误
$args = array(
\'posts_per_page\' => 1,
\'order\' => \'ASC\',
\'post_mime_type\' => \'image\',
\'post_parent\' => $post_id,
\'post_status\' => null,
\'post_type\' => \'attachment\',
);
$attachments = get_children( $args );
if ( $attachments ) {
foreach ( $attachments as $attachment ) {
$image_attributes = wp_get_attachment_image_src( $attachment->ID, \'thumbnail\' ) ? wp_get_attachment_image_src( $attachment->ID, \'thumbnail\' ) : wp_get_attachment_image_src( $attachment->ID, \'full\' );
echo \'<img src="\' . esc_url( wp_get_attachment_thumb_url( $attachment->ID ) ) . \'" class="current" />\';
}
}
