php-symfonyHow to do validation in PHP Symfony?
Validation in PHP Symfony can be done using the Validator component. It provides a set of constraints which can be used to validate data.
Example code
use Symfony\Component\Validator\Validation;
use Symfony\Component\Validator\Constraints\Length;
$validator = Validation::createValidator();
$violations = $validator->validate('abcde', [
new Length(['min' => 3, 'max' => 5]),
]);
echo count($violations);
Output example
0
Code explanation
use Symfony\Component\Validator\Validation;
- imports the Validation class from the Validator componentuse Symfony\Component\Validator\Constraints\Length;
- imports the Length constraint from the Validator component$validator = Validation::createValidator();
- creates a validator instance$violations = $validator->validate('abcde', [new Length(['min' => 3, 'max' => 5]),]);
- validates the string 'abcde' against the Length constraint with min and max valuesecho count($violations);
- prints the number of violations
Helpful links
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