$re = '/(?:leaflet|mapbox)[\w\-\._]*(?:-script)?/';
$str = 'id="leaflet"
id="mapbox"
id="leaflet-script"
id="mapbox-script"
id="leaflet-0.7.2-script"
id="webmap-leaflet-0.7.2"
';
preg_match_all($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