value * * @link http://www.sitemaps.org/protocol.php Sitemaps XML format */ class Lastmod extends AbstractValidator { /** * Regular expression to use when validating * */ const LASTMOD_REGEX = '/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])(T([0-1][0-9]|2[0-3])(:[0-5][0-9])(:[0-5][0-9])?(\\+|-)([0-1][0-9]|2[0-3]):[0-5][0-9])?$/'; /** * Validation key for not valid * */ const NOT_VALID = 'sitemapLastmodNotValid'; const INVALID = 'sitemapLastmodInvalid'; /** * Validation failure message template definitions * * @var array */ protected $messageTemplates = array( self::NOT_VALID => "The input is not a valid sitemap lastmod", self::INVALID => "Invalid type given. String expected", ); /** * Validates if a string is valid as a sitemap lastmod * * @link http://www.sitemaps.org/protocol.php#lastmoddef * * @param string $value value to validate * @return bool */ public function isValid($value) { if (!is_string($value)) { $this->error(self::INVALID); return false; } $this->setValue($value); ErrorHandler::start(); $result = preg_match(self::LASTMOD_REGEX, $value); ErrorHandler::stop(); if ($result != 1) { $this->error(self::NOT_VALID); return false; } return true; } }