$re = '/(((([[:digit:]]{4})-([[:digit:]]{2})-([[:digit:]]{2})|([[:digit:]]{2})-([[:digit:]]{2})|([[:digit:]]{2}))(_?))+)(\s(.+))?/m';
$str = '2024-08-25_25_2023_11_13 Disney+
2024-07-14_15
2023-06-25 DVD
2024-06-09_09
2018-05-01 VOD Orange
';
preg_match_all($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