| Conditions | 4 | 
| Paths | 3 | 
| Total Lines | 12 | 
| Code Lines | 6 | 
| Lines | 0 | 
| Ratio | 0 % | 
| Changes | 1 | ||
| Bugs | 0 | Features | 0 | 
| 1 | <?php  | 
            ||
| 16 | public function validate($value): ?string  | 
            ||
| 17 |     { | 
            ||
| 18 |         if (!is_string($value)) { | 
            ||
| 19 | return "This value must be a string.";  | 
            ||
| 20 | }  | 
            ||
| 21 | |||
| 22 | $dateTime = \DateTime::createFromFormat($this->format, $value);  | 
            ||
| 23 |         if (!$dateTime || $dateTime->format($this->format) !== $value) { | 
            ||
| 
                                                                                                    
                        
                         | 
                |||
| 24 |             return "This value must be a valid date in '{$this->format}' format."; | 
            ||
| 25 | }  | 
            ||
| 26 | |||
| 27 | return null;  | 
            ||
| 28 | }  | 
            ||
| 29 | }  |