Programmatically adding images to media library

$image_url="adress img";

$upload_dir = wp_upload_dir();

$image_data = file_get_contents( $image_url );

$filename = basename( $image_url );

if ( wp_mkdir_p( $upload_dir['path'] ) ) {
  $file = $upload_dir['path'] . "https://wordpress.stackexchange.com/" . $filename;
}
else {
  $file = $upload_dir['basedir'] . "https://wordpress.stackexchange.com/" . $filename;
}

file_put_contents( $file, $image_data );

$wp_filetype = wp_check_filetype( $filename, null );

$attachment = array(
  'post_mime_type' => $wp_filetype['type'],
  'post_title' => sanitize_file_name( $filename ),
  'post_content' => '',
  'post_status' => 'inherit'
);

$attach_id = wp_insert_attachment( $attachment, $file );
require_once( ABSPATH . 'wp-admin/includes/image.php' );
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );
wp_update_attachment_metadata( $attach_id, $attach_data );