$re = '/les-programmes\/[^\/]+\/.*$/';
$str = '/les-programmes/mon-premier-festival-2017
/les-programmes/les-incassables
/les-programmes/100-doc-colombie/nuestra-voz-de-tierra-memoria-y-futuro
';
preg_match_all($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