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

Description

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

Parameters

$urlstringrequired

URL to check

Return

Source

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

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

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