/**
  * @inheritdoc
  */
 public function transform($value)
 {
     if (is_null($value) || empty($value)) {
         return null;
     }
     if ($value instanceof \DateTime) {
         return $value;
     }
     // check if strtotime matches
     if (false !== strtotime($value)) {
         return new \DateTime($value, $this->timezone);
     }
     // last resort
     $transformer = new LocalizedStringToDateTimeTransformer();
     return $transformer->transform($value);
 }
 /**
  * @inheritdoc
  */
 public function transform($value)
 {
     if (is_null($value) || empty($value)) {
         return null;
     }
     if ($value instanceof \DateTime) {
         return $value;
     }
     // "per direct" => now
     if (preg_match('/(per )?dire(c|k)t/i', $value) || preg_match('/(gelijk|heden)/i', $value)) {
         return new \DateTime('now', $this->timezone);
     }
     // [sinds] 2 [mnd|maand|maanden]
     if (preg_match('/^(sinds\\s)?(?P<months>\\d+)\\s(maand|maanden|mnd)\\s?\\+?/i', $value, $matches)) {
         return new \DateTime(sprintf('-%s months', $matches['months']), $this->timezone);
     }
     // [12] oktober 2012|'12
     $regex = '/^(?P<day>\\d*\\s?)?(?P<month>' . $this->monthRegex . ')\\s+(?P<year>\\d{4}|\\\'\\d{2})/i';
     if (preg_match($regex, $value, $matches)) {
         $year = $matches['year'];
         $month = array_search(mb_strtolower($matches['month']), $this->monthNames);
         $day = isset($matches['day']) && $matches['day'] !== '' ? $matches['day'] : 1;
         return $this->createDate($year, $month, $day);
     }
     // 12 oktober [2012|'12]
     $regex = '/^(?P<day>\\d{1,2})\\s?(?P<month>' . $this->monthRegex . ')(\\s+(?P<year>\\d{4}|\\\'\\d{2}))?/i';
     if (preg_match($regex, $value, $matches)) {
         $year = isset($matches['year']) ? $matches['year'] : date('Y');
         $month = array_search(mb_strtolower($matches['month']), $this->monthNames);
         $day = $matches['day'];
         return $this->createDate($year, $month, $day);
     }
     // oktober [12|2012]
     $regex = '/^(?P<month>' . $this->monthRegex . ')(\\s+(?P<day_or_year>\\d{4}|\\d{1,2}))?/i';
     if (preg_match($regex, $value, $matches)) {
         $month = array_search(mb_strtolower($matches['month']), $this->monthNames);
         $year = date('Y');
         $day = 1;
         if (isset($matches['day_or_year'])) {
             if (strlen($matches['day_or_year']) === 2) {
                 $day = $matches['day_or_year'];
             } elseif (strlen($matches['day_or_year']) === 4) {
                 $year = $matches['day_or_year'];
             }
         }
         return $this->createDate($year, $month, $day);
     }
     // [begin|eind] mei [2013]
     $regex = '/^(?P<day>begin|eind)?\\s?(?P<month>' . $this->monthRegex . ')(?P<year>\\s+\\d{4})?/i';
     if (preg_match($regex, $value, $matches)) {
         $year = isset($matches['year']) ? $matches['year'] : date('Y');
         $month = array_search(mb_strtolower($matches['month']), $this->monthNames);
         if (isset($matches['day'])) {
             $day = $matches['day'] === 'begin' ? 5 : 25;
         } else {
             $day = 1;
         }
         return $this->createDate($year, $month, $day);
     }
     $regexes = ['/^(?P<day>\\d{1,2})[\\-\\/](?P<month>\\d{1,2})[\\-\\/](?P<year>\\d{4}|\\\'?\\d{2})/i' => [null, null, null], '/^(?P<year>\\d{4})[\\-\\/](?P<month>\\d{1,2})[\\-\\/](?P<day>\\d{1,2})/i' => [null, null, null], '/^(?P<year>\\d{4})[\\-\\/](?P<month>\\d{1,2})/i' => [null, null, 1], '/^(?P<year>\\d{4})/i' => [null, 1, 1]];
     foreach ($regexes as $regex => $defaults) {
         if (preg_match($regex, $value, $matches)) {
             list($defaultYear, $defaultMonth, $defaultDay) = $defaults;
             $year = isset($matches['year']) ? $matches['year'] : $defaultYear;
             $month = isset($matches['month']) ? $matches['month'] : $defaultMonth;
             $day = isset($matches['day']) ? $matches['day'] : $defaultDay;
             return $this->createDate($year, $month, $day);
         }
     }
     // check if strtotime matches
     if (false !== strtotime($value)) {
         return new \DateTime($value, $this->timezone);
     }
     // 26/03/2013
     if (preg_match('/^(?P<day>\\d{1,2})\\/(?P<month>\\d{1,2})\\/(?<year>\\d{4})/i', $value, $matches)) {
         return $this->createDate($matches['year'], $matches['month'], $matches['day']);
     }
     // last resort
     $transformer = new LocalizedStringToDateTimeTransformer();
     return $transformer->transform($value);
 }