laravel自定义表单验证规则

废话不多说，直接开始

1. 生成规则对象

   php artisan make:rule Phonecase
   

2. 打开app/Rules/Phonecase.php，passes方法里边写验证规则，验证通过返回true，否则返回false，message方法里写验证失败后返回的信息

   <?php
   namespace App\Rules;
   use App\User;
   use Illuminate\Contracts\Validation\Rule;
   
   class Phonecase implements Rule
   {
   	/**
    	* Create a new rule instance.
    	*
    	* @return void
    	*/
   	public function __construct()
   	{
       	//
   	}
   
   	/**
    	* Determine if the validation rule passes.
    	*
    	* @param  string  $attribute
    	* @param  mixed  $value
    	* @return bool
    	*/
   	public function passes($attribute, $value)
   	{
       	//判断输入的手机号是否存在
       	$user = User::where('phone_number',$value)->get();
       	if(count($user) == 0){
           	return false;
       	}else{
           	return true;
       	}
   	}
   
   	/**
    	* Get the validation error message.
    	*
    	* @return string
    	*/
   	public function message()
   	{
       	return '手机号尚未注册';
   	}
   }
   
   

3. 在控制器里边这么用

   public function login(Request $request){
       //获取表单输入
       $phone = $request->input('phone');
       $password = $request->input('password');
   
       //创建验证器
       $validator = Validator::make($request->all(), [
           'phone' => ['required', new Phonecase],
       ]);
   
       if ($validator->fails()) {
           return redirect('/login')
               ->withErrors($validator)
               ->withInput();
       }
   
       //获取用户信息
       $user = User::where('phone_number',$phone)->first();
       //数据库中取的密码
       $pass = $user->password;
       $str = Hash::make($pass);
       if (Hash::check($password, $pass)) {
           Auth::login($user);
           return redirect('/');
       }else{
           return redirect('/login')
               ->with('message','密码错误')
               ->withInput();
       }
   }
   

4. 前端显示页面

   <div class="form-group row">
   	<label for="phone" class="col-md-4 col-form-label text-md-right">{{ __('手机号') }}</label>
   	<div class="col-md-6">
   		<input id="phone" type="text" class="form-control @error('phone') is-invalid @enderror" name="phone" value="{{ old('phone') }}" required autocomplete="phone" autofocus>
   			@error('phone')
   				<span class="invalid-feedback" role="alert">
   					<strong>{{ $message }}</strong>
   				</span>
   			@enderror
   	</div>
   </div>