Determines whether an attachment URI is local and really an attachment.

For more information on this and similar theme functions, check out the Conditional Tags article in the Theme Developer Handbook.

$url string Required

URL to check

bool True on success, false on failure.

File: wp-includes/post.php. View all references

function is_local_attachment( $url ) {
	if ( strpos( $url, home_url() ) === false ) {
		return false;
	}
	if ( strpos( $url, home_url( '/?attachment_id=' ) ) !== false ) {
		return true;
	}

	$id = url_to_postid( $url );
	if ( $id ) {
		$post = get_post( $id );
		if ( 'attachment' === $post->post_type ) {
			return true;
		}
	}
	return false;
}