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| 1 | <?php |
| 2 | /** |
| 3 | * Pop PHP Framework (http://www.popphp.org/) |
| 4 | * |
| 5 | * @link https://github.com/popphp/popphp-framework |
| 6 | * @author Nick Sagona, III <dev@noladev.com> |
| 7 | * @copyright Copyright (c) 2009-2025 NOLA Interactive, LLC. |
| 8 | * @license http://www.popphp.org/license New BSD License |
| 9 | */ |
| 10 | |
| 11 | /** |
| 12 | * @namespace |
| 13 | */ |
| 14 | namespace Pop\Validator; |
| 15 | |
| 16 | /** |
| 17 | * Is null validator class |
| 18 | * |
| 19 | * @category Pop |
| 20 | * @package Pop\Validator |
| 21 | * @author Nick Sagona, III <dev@noladev.com> |
| 22 | * @copyright Copyright (c) 2009-2025 NOLA Interactive, LLC. |
| 23 | * @license http://www.popphp.org/license New BSD License |
| 24 | * @version 4.5.0 |
| 25 | */ |
| 26 | class IsNull extends AbstractValidator |
| 27 | { |
| 28 | |
| 29 | /** |
| 30 | * Method to evaluate the validator |
| 31 | * |
| 32 | * @param mixed $input |
| 33 | * @return bool |
| 34 | */ |
| 35 | public function evaluate(mixed $input = null): bool |
| 36 | { |
| 37 | $args = func_get_args(); |
| 38 | |
| 39 | // Set the input, if passed |
| 40 | if ($input !== null) { |
| 41 | $this->input = $input; |
| 42 | // Else, check if the input arg was passed as null |
| 43 | } else if (count($args) > 0) { |
| 44 | $this->input = $args[0]; |
| 45 | } |
| 46 | |
| 47 | // Set the default message |
| 48 | if (!$this->hasMessage()) { |
| 49 | $this->generateDefaultMessage(); |
| 50 | } |
| 51 | |
| 52 | return ($this->input === null); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Generate default message |
| 57 | |
| 58 | * @param mixed $name |
| 59 | * @param mixed $value |
| 60 | * @return string |
| 61 | */ |
| 62 | public function generateDefaultMessage(mixed $name = null, mixed $value = null): string |
| 63 | { |
| 64 | $this->message = "The " . (($name !== null) ? "'" . $name . "'" : "value") . " must be null."; |
| 65 | return $this->message; |
| 66 | } |
| 67 | |
| 68 | } |