Laravel form class tutorial: from entry to mastery

Laravel Form Class Tutorial: From Beginner to Mastery

In web development, forms are an indispensable part. In the Laravel framework, through its powerful form classes, we can process form data, verify form information, and store data in the database more conveniently. This article will introduce the use of Laravel form classes from entry to proficiency, including form generation, validation, submission and data storage, etc., and will help readers better understand and master it through specific code examples.

1. Form generation

In Laravel, we can use the Blade template engine to generate forms for display on the front-end page. The following is a simple form generation example:

<form action="/submit" method="POST">
    @csrf
    <input type="text" name="name" placeholder="姓名">
    <input type="email" name="email" placeholder="邮箱">
    <button type="submit">提交</button>
</form>

In the above example, @csrf is used to generate a CSRF token to ensure the security of form submission. By setting different input elements in the form, we can implement different types of forms, such as text boxes, drop-down boxes, multi-select boxes, etc.

2. Form verification

When users submit form data, we need to verify the data to ensure the legality of the data. In Laravel, form data validation can be implemented through form requests. The following is a simple form request class example:

namespace AppHttpRequests;

use IlluminateFoundationHttpFormRequest;

class SubmitFormRequest extends FormRequest
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        return [
            'name' => 'required|string',
            'email' => 'required|email',
        ];
    }
}

In the above example, we defined the form request class SubmitFormRequest and defined it in the rules method Data validation rules, such as required, string, email, etc. When a user submits a form, Laravel will automatically verify the validity of the form data based on these rules.

3. Submission of form data

After the form data is verified, we can submit the data to the designated controller for processing. The following is a simple controller example:

namespace AppHttpControllers;

use IlluminateHttpRequest;

class FormController extends Controller
{
    public function submitForm(SubmitFormRequest $request)
    {
        $name = $request->input('name');
        $email = $request->input('email');

        // 将数据存储到数据库中或进行其他操作
    }
}

In the above example, the submitForm method receives a parameter of type SubmitFormRequest, which can automatically process the form data. verify. Inside the method, we obtain form data through the request->input() method, and can store the data in the database or perform other operations.

4. Data Storage

Finally, when we obtain the form data and process it, we can store the data in the database. Here is a simple data storage example:

use AppModelsUser;

$user = new User();
$user->name = $name;
$user->email = $email;
$user->save();

In the above example, we create a User model object and store the form data to name and email attribute, finally save the data to the database through the save() method.

Through the above introduction and code examples, I believe everyone has a deeper understanding of the use of Laravel form classes. Through reasonable form generation, verification, submission and data storage, we can process user-submitted data more efficiently and improve the user experience and security of web applications. I hope this article is helpful to everyone, thank you!

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