How do I Validate Arrays in Laravel?

Validating Arrays in Laravel

When working with arrays in Laravel, validation can be a bit tricky. The default '*' syntax is used to validate the values within the array, rather than the array itself.

To validate the array itself, use the following pattern:

Validator::make($request->all(), [
    "array_name" => "required|array|min:1", //or 'some_other_rule'
]);

This ensures that the array exists (required) and contains at least one element (min:1).

For example, let's say you have an input field named "items" that receives an array of values. You can validate it as follows:

Validator::make($request->all(), [
    "items" => "required|array|min:1", //Ensure it's not empty
]);

Since Laravel 5.5, you can also use the built-in validate() method on the Request object directly:

$data = $request->validate([
    "items" => "required|array|min:1",
]);

Remember, when validating array values, use:

Validator::make($request->all(), [
    "array_name.*" => "some_validation_rule"
]);

This ensures that the individual values within the array meet the specified validation rules.

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