$attachments 持有一系列帖子，您缺少以下内容：

$attachment = $attachments[0];

foreach( $attachments as $attachment )

Update

foreach( $attachments as $attachment )
    if ($attachment->post_title == $programme) {

        echo the_attachment_link($post->ID, false);
        break;
    }

嗯，还是没有乐趣，我什么也得不到：

<?php $args = array(
    \'post_type\' => \'attachment\',
    \'numberposts\' => -1,
    \'post_status\' => null,
    \'post_parent\' => null,
    ); 
$attachments = get_posts( $args );

if ($attachment->post_title == $programme) {
    foreach ( $attachments as $attachment ) {
        echo the_attachment_link($post->ID, false);
    }
}
?>

为其他想要执行此操作的人排序的代码是：

<?php
$args = array(
    \'post_type\' => \'attachment\',
    \'numberposts\' => -1,
    \'post_status\' => null,
    \'post_parent\' => null,
    ); 
$attachments = get_posts( $args );

foreach ( $attachments as $attachment ) {

    if ($attachment->post_title == $programme) {
            echo wp_get_attachment_link($attachment->ID, \'thumbnail\', false, false);
            break;
        }

}
?>