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Describe the process of creating custom validation rules in Slim Framework.

Describe the process of creating custom validation rules in Slim Framework.

Answer: To create custom validation rules in Slim Framework, follow these steps:

1. Install Slim Validator: Ensure you have the Slim validator dependency in your project, using Composer.

2. Create Custom Rule Class:
– Define a new class that implements `RespectValidationContractRules` or extends `RespectValidationRulesAbstractRule`.
– Implement the `validate()` method to define your validation logic.

3. Register the Custom Rule:
– In your Slim application, use the validation rule by including it in your validation logic (e.g., within a route or middleware).

4. Use the Rule:
– Combine your custom rule with existing ones using the `RespectValidationValidator` to validate input data.

5. Handle Validation:
– Process validation results and handle errors accordingly in your application logic.

This enables you to effectively enforce custom validation criteria in your Slim Framework application.

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