Online PHP editor | output for p0b59

<?php function extractRouteParameterComponents($routeParameter) { $regexPattern = "/^{(\w+)(?::(.+))?}(\?)?$/"; if (preg_match($regexPattern, $routeParameter, $matches)) { // This group always exists $name = $matches[1]; // If the group was not present, we use [^/] as a default $pattern = empty($matches[2]) ? "[^/]" : $matches[2]; // The parameter is optional if the last capturing group // (which is a plain question mark) was found $optional = isset($matches[3]); return [$name, $pattern, $optional]; } } $routeParameter = "{id:[0-9]+}?"; list($name, $pattern, $optional) = extractRouteParameterComponents($routeParameter); var_dump($name, $pattern, $optional);