WordPress删除文章时同时删除图片附件

在WordPress中，删除文章时默认不会自动删除与之关联的媒体文件（如图片、附件等）。为了在删除文章时自动删除这些媒体文件，你可以通过添加自定义代码到主题的 functions.php 文件中来实现。以下是一个示例代码，它会在删除文章时自动删除文章中的图片附件以及特色图像。

代码一

function delete_associated_media($post_id) {
    // 检查文章类型，确保只处理文章类型为 'post' 的文章
    if (get_post_type($post_id) == 'post') {
        // 获取文章的媒体附件
        $attachments = get_attached_media('', $post_id);
        // 删除所有媒体附件
        foreach ($attachments as $attachment) {
            wp_delete_attachment($attachment->ID, true);
        }
        // 删除特色图像
        $featured_image_id = get_post_thumbnail_id($post_id);
        if ($featured_image_id) {
            wp_delete_attachment($featured_image_id, true);
        }
    }
}
add_action('before_delete_post', 'delete_associated_media');
function delete_associated_media($post_id) {
    // 检查文章类型，确保只处理文章类型为 'post' 的文章
    if (get_post_type($post_id) == 'post') {
        // 获取文章的媒体附件
        $attachments = get_attached_media('', $post_id);

        // 删除所有媒体附件
        foreach ($attachments as $attachment) {
            wp_delete_attachment($attachment->ID, true);
        }

        // 删除特色图像
        $featured_image_id = get_post_thumbnail_id($post_id);
        if ($featured_image_id) {
            wp_delete_attachment($featured_image_id, true);
        }
    }
}
add_action('before_delete_post', 'delete_associated_media');
function delete_associated_media($post_id) {
    // 检查文章类型，确保只处理文章类型为 'post' 的文章
    if (get_post_type($post_id) == 'post') {
        // 获取文章的媒体附件
        $attachments = get_attached_media('', $post_id);

        // 删除所有媒体附件
        foreach ($attachments as $attachment) {
            wp_delete_attachment($attachment->ID, true);
        }

        // 删除特色图像
        $featured_image_id = get_post_thumbnail_id($post_id);
        if ($featured_image_id) {
            wp_delete_attachment($featured_image_id, true);
        }
    }
}
add_action('before_delete_post', 'delete_associated_media');

代码二

 /* 删除文章时删除图片附件
/* ———————— */
function delete_post_and_attachments($post_ID) {
global $wpdb;
//删除特色图片
$thumbnails = $wpdb->get_results( “SELECT * FROM $wpdb->postmeta WHERE meta_key = ‘_thumbnail_id’ AND post_id = $post_ID” );
foreach ( $thumbnails as $thumbnail ) {
wp_delete_attachment( $thumbnail->meta_value, true );
}
//删除图片附件
$attachments = $wpdb->get_results( “SELECT * FROM $wpdb->posts WHERE post_parent = $post_ID AND post_type = ‘attachment’” );
foreach ( $attachments as $attachment ) {
wp_delete_attachment( $attachment->ID, true );
}
$wpdb->query( “DELETE FROM $wpdb->postmeta WHERE meta_key = ‘_thumbnail_id’ AND post_id = $post_ID” );
}
add_action(‘before_delete_post’, ‘delete_post_and_attachments’);
 /* 删除文章时删除图片附件
/* ———————— */
function delete_post_and_attachments($post_ID) {
global $wpdb;
//删除特色图片
$thumbnails = $wpdb->get_results( “SELECT * FROM $wpdb->postmeta WHERE meta_key = ‘_thumbnail_id’ AND post_id = $post_ID” );
foreach ( $thumbnails as $thumbnail ) {
wp_delete_attachment( $thumbnail->meta_value, true );
}
//删除图片附件
$attachments = $wpdb->get_results( “SELECT * FROM $wpdb->posts WHERE post_parent = $post_ID AND post_type = ‘attachment’” );
foreach ( $attachments as $attachment ) {
wp_delete_attachment( $attachment->ID, true );
}
$wpdb->query( “DELETE FROM $wpdb->postmeta WHERE meta_key = ‘_thumbnail_id’ AND post_id = $post_ID” );
}
add_action(‘before_delete_post’, ‘delete_post_and_attachments’);
 /* 删除文章时删除图片附件
/* ———————— */
function delete_post_and_attachments($post_ID) {
global $wpdb;
//删除特色图片
$thumbnails = $wpdb->get_results( “SELECT * FROM $wpdb->postmeta WHERE meta_key = ‘_thumbnail_id’ AND post_id = $post_ID” );
foreach ( $thumbnails as $thumbnail ) {
wp_delete_attachment( $thumbnail->meta_value, true );
}
//删除图片附件
$attachments = $wpdb->get_results( “SELECT * FROM $wpdb->posts WHERE post_parent = $post_ID AND post_type = ‘attachment’” );
foreach ( $attachments as $attachment ) {
wp_delete_attachment( $attachment->ID, true );
}
$wpdb->query( “DELETE FROM $wpdb->postmeta WHERE meta_key = ‘_thumbnail_id’ AND post_id = $post_ID” );
}
add_action(‘before_delete_post’, ‘delete_post_and_attachments’);

代码说明：

1. delete_associated_media($post_id): 这是一个自定义函数，用于删除与文章关联的媒体文件和特色图像。
2. get_attached_media('', $post_id): 获取与文章关联的所有媒体附件。
3. wp_delete_attachment($attachment->ID, true): 删除指定的媒体附件。第二个参数 true 表示同时删除媒体文件的实际文件。
4. get_post_thumbnail_id($post_id): 获取文章的特色图像ID。
5. wp_delete_attachment($featured_image_id, true): 删除特色图像。
6. add_action('before_delete_post', 'delete_associated_media'): 在删除文章之前触发 delete_associated_media 函数。

值得注意的是：当你在删除文章时先执行函数内容，删除特色图片以及图片附件，但是如果在使用action delete_post而不是before_delete_post将导致删除文章后因媒体附件与文章关联已取消而无法正确删除。