WordPress at a glance

wp_delete_attachment() WP 1.0

Trash or delete an attachment.

When an attachment is permanently deleted, the file will also be removed. Deletion removes all post meta fields, taxonomy, comments, etc. associated with the attachment (except the main post).

The attachment is moved to the trash instead of permanently deleted unless trash for media is disabled, item is already in the trash, or $force_delete is true.

  • Global. wpdb. $wpdb WordPress database abstraction object.
Hooks from function:
Return

WP_Post/false/null. Post data on success, false or null on failure.

Usage

wp_delete_attachment( $post_id, $force_delete );
$post_id(int) (required)
Attachment ID.
$force_delete(true/false)
Whether to bypass trash and force deletion.
Default: false

Code of wp_delete_attachment: wp-includes/post.php VER 5.0.1

<?php
function wp_delete_attachment( $post_id, $force_delete = false ) {
	global $wpdb;

	$post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id ) );

	if ( ! $post ) {
		return $post;
	}

	$post = get_post( $post );

	if ( 'attachment' !== $post->post_type ) {
		return false;
	}

	if ( ! $force_delete && EMPTY_TRASH_DAYS && MEDIA_TRASH && 'trash' !== $post->post_status ) {
		return wp_trash_post( $post_id );
	}

	delete_post_meta($post_id, '_wp_trash_meta_status');
	delete_post_meta($post_id, '_wp_trash_meta_time');

	$meta = wp_get_attachment_metadata( $post_id );
	$backup_sizes = get_post_meta( $post->ID, '_wp_attachment_backup_sizes', true );
	$file = get_attached_file( $post_id );

	if ( is_multisite() )
		delete_transient( 'dirsize_cache' );

	/**
	 * Fires before an attachment is deleted, at the start of wp_delete_attachment().
	 *
	 * @since 2.0.0
	 *
	 * @param int $post_id Attachment ID.
	 */
	do_action( 'delete_attachment', $post_id );

	wp_delete_object_term_relationships($post_id, array('category', 'post_tag'));
	wp_delete_object_term_relationships($post_id, get_object_taxonomies($post->post_type));

	// Delete all for any posts.
	delete_metadata( 'post', null, '_thumbnail_id', $post_id, true );

	wp_defer_comment_counting( true );

	$comment_ids = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ));
	foreach ( $comment_ids as $comment_id ) {
		wp_delete_comment( $comment_id, true );
	}

	wp_defer_comment_counting( false );

	$post_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d ", $post_id ));
	foreach ( $post_meta_ids as $mid )
		delete_metadata_by_mid( 'post', $mid );

	/** This action is documented in wp-includes/post.php */
	do_action( 'delete_post', $post_id );
	$result = $wpdb->delete( $wpdb->posts, array( 'ID' => $post_id ) );
	if ( ! $result ) {
		return false;
	}
	/** This action is documented in wp-includes/post.php */
	do_action( 'deleted_post', $post_id );

	wp_delete_attachment_files( $post_id, $meta, $backup_sizes, $file );

	clean_post_cache( $post );

	return $post;
}

Related Functions

From category: Attachments (Media files)

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