用来自动设置第一张图为封面图，参考本站，打开你的主题functions.php文件

function autoset_featured() {

global $post;

$already_has_thumb = has_post_thumbnail($post->ID);

if (!$already_has_thumb)  {

$attached_image = get_children( "post_parent=$post->ID&post_type=attachment&post_mime_type=image&numberposts=1" );

if ($attached_image) {

foreach ($attached_image as $attachment_id => $attachment) {

set_post_thumbnail($post->ID, $attachment_id);

}

}

}

}  //end function

add_action('the_post', 'autoset_featured');

add_action('save_post', 'autoset_featured');

add_action('draft_to_publish', 'autoset_featured');

add_action('new_to_publish', 'autoset_featured');

add_action('pending_to_publish', 'autoset_featured');

 

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