描述:
通过id删除文章
用法:
<?php wp_delete_post( $postid, $force_delete ); ?>
参数:
$postid
(integer) (可选) 文章ID
默认值: 0
$force_delete
(bool) (可选) 是否绕过垃圾箱并强制删除
默认值: false
源文件:
/**
* Trash or delete a post or page.
*
* When the post and page is permanently deleted, everything that is tied to
* it is deleted also. This includes comments, post meta fields, and terms
* associated with the post.
*
* The post or page is moved to trash instead of permanently deleted unless
* trash is disabled, item is already in the trash, or $force_delete is true.
*
* @since 1.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
* @see wp_delete_attachment()
* @see wp_trash_post()
*
* @param int $postid Optional. Post ID. Default 0.
* @param bool $force_delete Optional. Whether to bypass trash and force deletion.
* Default false.
* @return array|false|WP_Post False on failure.
*/
function wp_delete_post( $postid = 0, $force_delete = false ) {
global $wpdb;
if ( !$post = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $postid)) )
return $post;
if ( !$force_delete && ( $post->post_type == 'post' || $post->post_type == 'page') && get_post_status( $postid ) != 'trash' && EMPTY_TRASH_DAYS )
return wp_trash_post( $postid );
if ( $post->post_type == 'attachment' )
return wp_delete_attachment( $postid, $force_delete );
/**
* Fires before a post is deleted, at the start of wp_delete_post().
*
* @since 3.2.0
*
* @see wp_delete_post()
*
* @param int $postid Post ID.
*/
do_action( 'before_delete_post', $postid );
delete_post_meta($postid,'_wp_trash_meta_status');
delete_post_meta($postid,'_wp_trash_meta_time');
wp_delete_object_term_relationships($postid, get_object_taxonomies($post->post_type));
$parent_data = array( 'post_parent' => $post->post_parent );
$parent_where = array( 'post_parent' => $postid );
if ( is_post_type_hierarchical( $post->post_type ) ) {
// Point children of this page to its parent, also clean the cache of affected children.
$children_query = $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE post_parent = %d AND post_type = %s", $postid, $post->post_type );
$children = $wpdb->get_results( $children_query );
$wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => $post->post_type ) );
}
// Do raw query. wp_get_post_revisions() is filtered.
$revision_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_parent = %d AND post_type = 'revision'", $postid ) );
// Use wp_delete_post (via wp_delete_post_revision) again. Ensures any meta/misplaced data gets cleaned up.
foreach ( $revision_ids as $revision_id )
wp_delete_post_revision( $revision_id );
// Point all attachments to this post up one level.
$wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'attachment' ) );
$comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $postid ));
foreach ( $comment_ids as $comment_id )
wp_delete_comment( $comment_id, true );
$post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $postid ));
foreach ( $post_meta_ids as $mid )
delete_metadata_by_mid( 'post', $mid );
/**
* Fires immediately before a post is deleted from the database.
*
* @since 1.2.0
*
* @param int $postid Post ID.
*/
do_action( 'delete_post', $postid );
$result = $wpdb->delete( $wpdb->posts, array( 'ID' => $postid ) );
if ( ! $result ) {
return false;
}
/**
* Fires immediately after a post is deleted from the database.
*
* @since 2.2.0
*
* @param int $postid Post ID.
*/
do_action( 'deleted_post', $postid );
clean_post_cache( $post );
if ( is_post_type_hierarchical( $post->post_type ) && $children ) {
foreach ( $children as $child )
clean_post_cache( $child );
}
wp_clear_scheduled_hook('publish_future_post', array( $postid ) );
/**
* Fires after a post is deleted, at the conclusion of wp_delete_post().
*
* @since 3.2.0
*
* @see wp_delete_post()
*
* @param int $postid Post ID.
*/
do_action( 'after_delete_post', $postid );
return $post;
}