[a-z0-9][a-z0-9\-]{1,63}\.[a-z\.]{2,6})$/i', $domain, $match ) ) { // Set the domain - i.e. google.com $domain = $match['domain']; } if ( ! empty( $domain ) ) { switch( $domain ) { case 'dropbox.com': if ( substr( $link, -4 ) == 'dl=0' ) { return str_replace( 'dl=0', 'dl=1', $link ); } if ( strpos( $link, '?' ) === false ) { return $link . '?dl=1'; } if ( strpos( $link, 'dl=1' ) === false ) { return $link . '&dl=1'; } break; case 'google.com': if ( !empty( $type ) ) { switch( $type ) { case 'file': $pattern = '/(?<=\/file\/d\/).*?(?=\/edit)/'; preg_match( $pattern, $link, $match ); if (!empty($match[0])) { $file_id = $match[0]; return 'https://drive.google.com/uc?export=download&id=' . $file_id; } break; case 'spreadsheets': $pattern = '/(?<=\/spreadsheets\/d\/).*?(?=\/edit)/'; preg_match( $pattern, $link, $match ); if ( !empty( $match[0] ) ) { $file_id = $match[0]; return 'https://docs.google.com/spreadsheets/d/' . $file_id . '/export?format=' . $format; } break; default: return $link; break; } } default: return $link; break; } } return $link; } }