重定向回withInput()输出控件中的数据

// 后端代码（使用Laravel框架为例）
public function store(Request $request)
{
    $validator = Validator::make($request->all(), [
        'name' => 'required',
        'email' => 'required|email',
    ]);

    if ($validator->fails()) {
        return redirect()->back()
            ->withErrors($validator)
            ->withInput();
    }

    // 处理表单提交逻辑

    return redirect()->back();
}

// 前端代码
<form method="POST" action="/example">
    @csrf

    <div>
        <label for="name">姓名</label>
        <input type="text" name="name" value="{{ old('name') }}" required autofocus>

        @error('name')
            <span>{{ $message }}</span>
        @enderror
    </div>

    <div>
        <label for="email">邮箱</label>
        <input type="email" name="email" value="{{ old('email') }}" required>

        @error('email')
            <span>{{ $message }}</span>
        @enderror
    </div>

    <button type="submit">提交</button>
</form>