How to Validate Arrays in Laravel: A Step-by-Step Guide

Array Validation in Laravel Demystified

In Laravel, validating an array can be tricky if you're not using the correct syntax. When attempting to validate an array with values stored in input elements with names like "name[]", it's essential to understand the proper notation.

To effectively validate an array, you can't use the asterisk () symbol as it checks the array's values, not the array itself. Instead, you should declare a specific name for the array and apply the asterisk () to its values.

Here's an example:

$validator = Validator::make($request->all(), [
    "names"    => "required|array|min:3",
    "names.*"  => "required|string|distinct|min:3",
]);

In this example:

• "names" verifies that the "names" array exists, contains at least three elements, and is an array (not a scalar).
• "names.*" ensures that each value within the "names" array is a required string, contains at least three characters, and has unique values (no duplicates).

Remember, the key to successful array validation in Laravel is to specify the array's name explicitly and apply the validation rules to its individual values.

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