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How to customize validation error messages in Laravel?

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In Laravel, you can customize validation error messages by using the messages method of the Validator class. This method takes an array of attribute-rule-message combinations as an argument, and allows you to set custom error messages for specific validation rules.

Here is an example of how to use the messages method to set custom error messages for the required and email validation rules in Laravel:

use Validator;

$validator = Validator::make($request->all(), [
    'name' => 'required',
    'email' => 'required|email',
]);

$validator->messages([
    'name.required' => 'The name field is required.',
    'email.required' => 'The email field is required.',
    'email.email' => 'The email field must be a valid email address.',
]);

if ($validator->fails()) {
    // validation failed
}

In this example, the messages method sets custom error messages for the required and email validation rules. The keys in the array (e.g. 'name.required') represent the attribute and rule being validated, and the values represent the custom error messages.

You can also use placeholders in your custom error messages to display the name of the attribute being validated. For example:

$validator->messages([
    'name.required' => 'The :attribute field is required.',
]);

In this case, the :attribute placeholder will be replaced with the name of the attribute being validated (in this case, name).

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