$re = '/^(.*?) - (.*?)(?: - (.*?))?(?: - (.*?))?$/m';
$str = '2020 02 15 - Joe Sephine
2020 02 18 - Candy Kane - Toot Suites - 123 Some Street
2020 02 19 - Badonk Edonk - On A Boat';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php