今天来讲一下，Lumen的Validator函数

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use Validator;
 
...
 
Class .. {
 
public function ..(){
 
    Validator::make($input, $rules, $message, $attributes)->validate();
 
}
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use Validator是可以直接引用的，虽然不能直接找到该命名空间的对应的位置。也可以直接在控制器use和使用Validator::make(）。
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<em>至于类名和函数名就随意啦，$input为传入验证的数组，$rule为验证规则，$message为返回的规则，</em>$attributes为验证字段的对应中文注释。废话少说，先模拟一个标准的数据，
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$input = [
      'typeid' => 1,
      'title'  =>  '测试标题',
      'content' => '测试内容'
];
 
$rules = [
        'typeid' => 'required|numeric',
        'title' => 'required',
        'content' => 'required'
];
 
$message = [
       "required" => ":attribute 不能为空",
       "numeric" => ":attribute 格式不正确"
];
 
$attributes = [
        'typeid' => '分类id',
        'title' => '标题',
        'content' => '内容'
];

执行后，可能报错Illuminate\Validation\ValidationException: The given data failed to pass validation ...... vendor\illuminate\validation\Validator.php on line305

这是Lumen的异常处理机制，vendor\illuminate\validation\Validator.php

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/**
   * Run the validator's rules against its data.(运行验证的规则对数据。)
   *
   * @return void
   *
   * @throws \Illuminate\Validation\ValidationException
   */
  public function validate()
  {
      if ($this->fails()) {
          throw new ValidationException($this);
      }
  }

　　看看vendor\illuminate\validation\ValidationException.php

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class ValidationException extends Exception
{
　　...
　　/**
     * Create a new exception instance.(创建一个新的异常实例。)
     *
     * @param  \Illuminate\Contracts\Validation\Validator  $validator
     * @param  \Symfony\Component\HttpFoundation\Response  $response
     * @return void
     */
    public function __construct($validator, $response = null)
    {
        parent::__construct('The given data failed to pass validation.');
 
        $this->response = $response;
        $this->validator = $validator;
}

直接这样抛出异常肯定不ok，接下看看解决方法，

方法一，异常拦截

进入app\Exceptions\Hanlder.php

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public function render($request, Exception $e)
{
　　//自带数据验证错误返回
　　if ($e instanceof \Illuminate\Validation\ValidationException) {
　　　　return $this->handleValidationException($request, $e);
　　}
 
　　return parent::render($request, $e);
}<br data-filtered="filtered"><br data-filtered="filtered">
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//获取自带数据验证错误信息
protected function handleValidationException($request, $e)
{
　　$errors = @$e->validator->errors()->toArray();
　　$message = null;
　　if (count($errors)) {
　　　　$firstKey = array_keys($errors)[0];
　　　　$message = @$e->validator->errors()->get($firstKey)[0];
　　　　if (strlen($message) == 0) {
　　　　　　$message = "An error has occurred when trying to register";
　　　　}
　　}
 
　　if ($message == null) {
　　　　$message = "An unknown error has occured";
　　}
 
　　return $message;
}

　　

结果会返回第一个验证不过的对应信息。

不过直接在异常这里做处理不太合理，方法二

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//Validator::make($input, $rules , $message, $attributes)->validate();
$validator = Validator::make($input, $rules, $message, $attributes);
$failed = $validator->failed();
$messages = $validator->messages();
 
if(count($messages) != 0){
      dataReturn(1,current(current($messages))[0]);
}

调用failed和messages方法来处理会优雅许多！

接下来说一下大家关心的手机验证，

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Validator::extend('mobile', function($attribute, $value, $parameters) {
            return preg_match("/^1[34578]{1}\d{9}$/",$value);
        });
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<span style="font-size: 14px; line-height: 21px; white-space: normal"><span style="font-family: "PingFang SC", "Helvetica Neue", Helvetica, Arial, sans-serif">这段代码应该很熟悉吧，不过到底放在哪里合适呢？我是这么做的<br data-filtered="filtered"><br data-filtered="filtered">bootstrap/app.phpj加上<br data-filtered="filtered"></span></span>
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$app->register(App\Providers\Validate\ValidateServiceProvider::class);
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然后创建对应服务类app/Providers/Validate/ValidateServiceProvider.php

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<?php
 
namespace App\Providers\Validate;
use Validator;
use Illuminate\Support\ServiceProvider;
 
class ValidateServiceProvider extends ServiceProvider
{
 
    /**
     * 启动应用服务
     *
     * @return void
     */
    public function boot()
    {
 
        Validator::extend('mobile', function($attribute, $value, $parameters) {
            return preg_match("/^1[34578]{1}\d{9}$/",$value);
        });
      
    }
 
    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
         
    }
}

加入手机验证

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$input = [
      'typeid' => 1,
      'title'  =>  '测试标题',
      'content' => '测试内容',
      'phone' => '1881'
];
 
$rules = [
        'typeid' => 'required|numeric',
        'title' => 'required',
        'content' => 'required',
        'phone' =>  'mobile'
];
 
$message = [
       "required" => ":attribute 不能为空",
       "numeric" => ":attribute 格式不正确",
       "mobile" =>  ":attribute 手机格式不正确"
];
 
$attributes = [
        'typeid' => '分类id',
        'title' => '标题',
        'content' => '内容',
        'phone' => '联系方式'
];

就这样简单的实现了手机验证！

如果不想每次都传$message的话，可以看看这里\vendor\laravel\lumen-framework\resources\lang\en\validation.php

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<?php
 
return [
 
    /*
    |--------------------------------------------------------------------------
    | Validation Language Lines
    |--------------------------------------------------------------------------
    |
    | The following language lines contain the default error messages used by
    | the validator class. Some of these rules have multiple versions such
    | as the size rules. Feel free to tweak each of these messages here.
    |
    */
 
    'accepted'             => 'The :attribute must be accepted.',
    'active_url'           => 'The :attribute is not a valid URL.',
    'after'                => 'The :attribute must be a date after :date.',
    'after_or_equal'       => 'The :attribute must be a date after or equal to :date.',
    'alpha'                => 'The :attribute may only contain letters.',
    'alpha_dash'           => 'The :attribute may only contain letters, numbers, and dashes.',
    'alpha_num'            => 'The :attribute may only contain letters and numbers.',
    'array'                => 'The :attribute must be an array.',
    'before'               => 'The :attribute must be a date before :date.',
    'before_or_equal'      => 'The :attribute must be a date before or equal to :date.',
    'between'              => [
        'numeric' => 'The :attribute must be between :min and :max.',
        'file'    => 'The :attribute must be between :min and :max kilobytes.',
        'string'  => 'The :attribute must be between :min and :max characters.',
        'array'   => 'The :attribute must have between :min and :max items.',
    ],
    'boolean'              => 'The :attribute field must be true or false.',
    'confirmed'            => 'The :attribute confirmation does not match.',
    'date'                 => 'The :attribute is not a valid date.',
    'date_format'          => 'The :attribute does not match the format :format.',
    'different'            => 'The :attribute and :other must be different.',
    'digits'               => 'The :attribute must be :digits digits.',
    'digits_between'       => 'The :attribute must be between :min and :max digits.',
    'dimensions'           => 'The :attribute has invalid image dimensions.',
    'distinct'             => 'The :attribute field has a duplicate value.',
    'email'                => 'The :attribute must be a valid email address.',
    'exists'               => 'The selected :attribute is invalid.',
    'file'                 => 'The :attribute must be a file.',
    'filled'               => 'The :attribute field is required.',
    'image'                => 'The :attribute must be an image.',
    'in'                   => 'The selected :attribute is invalid.',
    'in_array'             => 'The :attribute field does not exist in :other.',
    'integer'              => 'The :attribute must be an integer.',
    'ip'                   => 'The :attribute must be a valid IP address.',
    'json'                 => 'The :attribute must be a valid JSON string.',
    'max'                  => [
        'numeric' => 'The :attribute may not be greater than :max.',
        'file'    => 'The :attribute may not be greater than :max kilobytes.',
        'string'  => 'The :attribute may not be greater than :max characters.',
        'array'   => 'The :attribute may not have more than :max items.',
    ],
    'mimes'                => 'The :attribute must be a file of type: :values.',
    'mimetypes'            => 'The :attribute must be a file of type: :values.',
    'min'                  => [
        'numeric' => 'The :attribute must be at least :min.',
        'file'    => 'The :attribute must be at least :min kilobytes.',
        'string'  => 'The :attribute must be at least :min characters.',
        'array'   => 'The :attribute must have at least :min items.',
    ],
    'not_in'               => 'The selected :attribute is invalid.',
    'numeric'              => 'The :attribute must be a number.',
    'present'              => 'The :attribute field must be present.',
    'regex'                => 'The :attribute format is invalid.',
    'required'             => 'The :attribute field is required.',
    'required_if'          => 'The :attribute field is required when :other is :value.',
    'required_unless'      => 'The :attribute field is required unless :other is in :values.',
    'required_with'        => 'The :attribute field is required when :values is present.',
    'required_with_all'    => 'The :attribute field is required when :values is present.',
    'required_without'     => 'The :attribute field is required when :values is not present.',
    'required_without_all' => 'The :attribute field is required when none of :values are present.',
    'same'                 => 'The :attribute and :other must match.',
    'size'                 => [
        'numeric' => 'The :attribute must be :size.',
        'file'    => 'The :attribute must be :size kilobytes.',
        'string'  => 'The :attribute must be :size characters.',
        'array'   => 'The :attribute must contain :size items.',
    ],
    'string'               => 'The :attribute must be a string.',
    'timezone'             => 'The :attribute must be a valid zone.',
    'unique'               => 'The :attribute has already been taken.',
    'uploaded'             => 'The :attribute failed to upload.',
    'url'                  => 'The :attribute format is invalid.',
 
    /*
    |--------------------------------------------------------------------------
    | Custom Validation Language Lines
    |--------------------------------------------------------------------------
    |
    | Here you may specify custom validation messages for attributes using the
    | convention "attribute.rule" to name the lines. This makes it quick to
    | specify a specific custom language line for a given attribute rule.
    |
    */
 
    'custom' => [
        'attribute-name' => [
            'rule-name' => 'custom-message',
        ],
    ],
 
    /*
    |--------------------------------------------------------------------------
    | Custom Validation Attributes
    |--------------------------------------------------------------------------
    |
    | The following language lines are used to swap attribute place-holders
    | with something more reader friendly such as E-Mail Address instead
    | of "email". This simply helps us make messages a little cleaner.
    |
    */
 
    'attributes' => [],
 
];

默认都是英文，直接改成下面的中文配置

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<?php
 
return [
 
/*
|--------------------------------------------------------------------------
| Validation Language Lines
|--------------------------------------------------------------------------
|
| The following language lines contain the default error messages used by
| the validator class. Some of these rules have multiple versions such
| as the size rules. Feel free to tweak each of these messages here.
|
*/
 
'accepted'             => ':attribute必须接受',
'active_url'           => ':attribute必须是一个合法的 URL',
'after'                => ':attribute 必须是 :date 之后的一个日期',
'after_or_equal'       => ':attribute 必须是 :date 之后或相同的一个日期',
'alpha'                => ':attribute只能包含字母',
'alpha_dash'           => ':attribute只能包含字母、数字、中划线或下划线',
'alpha_num'            => ':attribute只能包含字母和数字',
'array'                => ':attribute必须是一个数组',
'before'               => ':attribute 必须是 :date 之前的一个日期',
'before_or_equal'      => ':attribute 必须是 :date 之前或相同的一个日期',
'between'              => [
    'numeric' => ':attribute 必须在 :min 到 :max 之间',
    'file'    => ':attribute 必须在 :min 到 :max KB 之间',
    'string'  => ':attribute 必须在 :min 到 :max 个字符之间',
    'array'   => ':attribute 必须在 :min 到 :max 项之间',
],
'boolean'              => ':attribute 字符必须是 true 或 false',
'confirmed'            => ':attribute 二次确认不匹配',
'date'                 => ':attribute 必须是一个合法的日期',
'date_format'          => ':attribute 与给定的格式 :format 不符合',
'different'            => ':attribute 必须不同于 :other',
'digits'               => ':attribute必须是 :digits 位.',
'digits_between'       => ':attribute 必须在 :min 和 :max 位之间',
'dimensions'           => ':attribute具有无效的图片尺寸',
'distinct'             => ':attribute字段具有重复值',
'email'                => ':attribute必须是一个合法的电子邮件地址',
'exists'               => '选定的 :attribute 是无效的.',
'file'                 => ':attribute必须是一个文件',
'filled'               => ':attribute的字段是必填的',
'image'                => ':attribute必须是 jpeg, png, bmp 或者 gif 格式的图片',
'in'                   => '选定的 :attribute 是无效的',
'in_array'             => ':attribute 字段不存在于 :other',
'integer'              => ':attribute 必须是个整数',
'ip'                   => ':attribute必须是一个合法的 IP 地址。',
'json'                 => ':attribute必须是一个合法的 JSON 字符串',
'max'                  => [
    'numeric' => ':attribute 的最大长度为 :max 位',
    'file'    => ':attribute 的最大为 :max',
    'string'  => ':attribute 的最大长度为 :max 字符',
    'array'   => ':attribute 的最大个数为 :max 个.',
],
'mimes'                => ':attribute 的文件类型必须是 :values',
'min'                  => [
    'numeric' => ':attribute 的最小长度为 :min 位',
    'file'    => ':attribute 大小至少为 :min KB',
    'string'  => ':attribute 的最小长度为 :min 字符',
    'array'   => ':attribute 至少有 :min 项',
],
'not_in'               => '选定的 :attribute 是无效的',
'numeric'              => ':attribute 必须是数字',
'present'              => ':attribute 字段必须存在',
'regex'                => ':attribute 格式是无效的',
'required'             => ':attribute 字段是必须的',
'required_if'          => ':attribute 字段是必须的当 :other 是 :value',
'required_unless'      => ':attribute 字段是必须的，除非 :other 是在 :values 中',
'required_with'        => ':attribute 字段是必须的当 :values 是存在的',
'required_with_all'    => ':attribute 字段是必须的当 :values 是存在的',
'required_without'     => ':attribute 字段是必须的当 :values 是不存在的',
'required_without_all' => ':attribute 字段是必须的当 没有一个 :values 是存在的',
'same'                 => ':attribute和:other必须匹配',
'size'                 => [
    'numeric' => ':attribute 必须是 :size 位',
    'file'    => ':attribute 必须是 :size KB',
    'string'  => ':attribute 必须是 :size 个字符',
    'array'   => ':attribute 必须包括 :size 项',
],
'string'               => ':attribute 必须是一个字符串',
'timezone'             => ':attribute 必须是个有效的时区.',
'unique'               => ':attribute 已存在',
'url'                  => ':attribute 无效的格式',
'mobile'                  => ':attribute 手机号码无效',
 
/*
|--------------------------------------------------------------------------
| Custom Validation Language Lines
|--------------------------------------------------------------------------
|
| Here you may specify custom validation messages for attributes using the
| convention "attribute.rule" to name the lines. This makes it quick to
| specify a specific custom language line for a given attribute rule.
|
*/
 
'custom' => [
    'attribute-name' => [
        'rule-name' => 'custom-message',
    ],
],
 
/*
|--------------------------------------------------------------------------
| Custom Validation Attributes
|--------------------------------------------------------------------------
|
| The following language lines are used to swap attribute place-holders
| with something more reader friendly such as E-Mail Address instead
| of "email". This simply helps us make messages a little cleaner.
|
*/
 
'attributes' => [],
 
];

然后在没有传$message时，就会默认读这里了！

接下来讲讲Lumen验证的周期，当你调用下面的语句时，

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Validator::make($input, $rules, $message, $attributes);
1
 

会直接调用到对应的Factory.php，这可以说是一种规范，这里是vendor\illuminate\validation\Factory.php，看看对应的make函数

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/**
 * 创建一个新的验证实例。
 */
public function make(array $data, array $rules, array $messages = [], array $customAttributes = [])
{
    // The presence verifier is responsible for checking the unique and exists data
    // for the validator. It is behind an interface so that multiple versions of
    // it may be written besides database. We'll inject it into the validator.
    $validator = $this->resolve(
        $data, $rules, $messages, $customAttributes
    );
 
    if (! is_null($this->verifier)) {
        $validator->setPresenceVerifier($this->verifier);
    }
 
    // Next we'll set the IoC container instance of the validator, which is used to
    // resolve out class based validator extensions. If it is not set then these
    // types of extensions will not be possible on these validation instances.
    if (! is_null($this->container)) {
        $validator->setContainer($this->container);
    }
 
    $this->addExtensions($validator);
 
    return $validator;
}

　　然后来到resolve函数，

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/**
 * 解决一个新的验证实例。
 */
protected function resolve(array $data, array $rules, array $messages, array $customAttributes)
{
    if (is_null($this->resolver)) {
        return new Validator($this->translator, $data, $rules, $messages, $customAttributes);
    }
 
    return call_user_func($this->resolver, $this->translator, $data, $rules, $messages, $customAttributes);
}
1
 

　　

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namespace Illuminate\Validation;
 
..
 
class Validator implements ValidatorContract
{
 
...
 
 
    /**
     * Create a new Validator instance.(创建一个新的验证实例。)
     */
    public function __construct(Translator $translator, array $data, array $rules,
                                array $messages = [], array $customAttributes = [])
    {
        $this->initialRules = $rules;
        $this->translator = $translator;
        $this->customMessages = $messages;
        $this->data = $this->parseData($data);
        $this->customAttributes = $customAttributes;
 
        $this->setRules($rules);
    }
 
 
}

make执行到这里完。

接下来，先来看看刚才用的第一个验证函数validate()，

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/**
 * Run the validator's rules against its data.（运行验证的规则对数据。）
 */
public function validate()
{
    if ($this->fails()) {
        throw new ValidationException($this);
    }
}
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/**
     * Determine if the data fails the validation rules.(确定数据验证失败的规则。确定数据验证失败的规则。)<br data-filtered="filtered">　　　* @return bool
     */
    public function fails()
    {
        return ! $this->passes();//稍后分析
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}

显而易见，一旦验证不通过则抛出异常，不太适合一般的开发。

再看看messages()

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/**
 * Get the message container for the validator.(得到验证消息的容器。)
 */
public function messages()
{
    if (! $this->messages) {
        $this->passes();//稍后分析
    }
 
    return $this->messages;
}

这里函数是返回所有验证不通过的信息

再看看failed()

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/**
   * Get the failed validation rules.(获取失败的验证规则。)
   *
   * @return array
   */
  public function failed()
  {
      return $this->failedRules;
  }

这边好像验证失败也是空，晕~

接下来看passes()

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/**
   * Determine if the data passes the validation rules.（确定数据验证规则）
   *
   * @return bool
   */
  public function passes()
  {
      $this->messages = new MessageBag;
 
      // We'll spin through each rule, validating the attributes attached to that
      // rule. Any error messages will be added to the containers with each of
      // the other error messages, returning true if we don't have messages.
      foreach ($this->rules as $attribute => $rules) {
          $attribute = str_replace('\.', '->', $attribute);
 
          foreach ($rules as $rule) {
              $this->validateAttribute($attribute, $rule);
 
              if ($this->shouldStopValidating($attribute)) {
                  break;
              }
          }
      }
 
      // Here we will spin through all of the "after" hooks on this validator and
      // fire them off. This gives the callbacks a chance to perform all kinds
      // of other validation that needs to get wrapped up in this operation.
      foreach ($this->after as $after) {
          call_user_func($after);
      }
 
      return $this->messages->isEmpty();
  }

　接下来干货来了validateAttribute($attribute, $rule)函数，处理都在这里调的

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/**
   * Validate a given attribute against a rule.（根据规则验证给定属性。）
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*
 * @param  string  $attribute
 * @param  string  $rule
 * @return void
 */
protected function validateAttribute($attribute, $rule)
{
    $this->currentRule = $rule;
 
    list($rule, $parameters) = ValidationRuleParser::parse($rule);
 
    if ($rule == '') {
        return;
    }
 
    // First we will get the correct keys for the given attribute in case the field is nested in
    // an array. Then we determine if the given rule accepts other field names as parameters.
    // If so, we will replace any asterisks found in the parameters with the correct keys.
    if (($keys = $this->getExplicitKeys($attribute)) &&
        $this->dependsOnOtherFields($rule)) {
        $parameters = $this->replaceAsterisksInParameters($parameters, $keys);
    }
 
    $value = $this->getValue($attribute);
 
    // If the attribute is a file, we will verify that the file upload was actually successful
    // and if it wasn't we will add a failure for the attribute. Files may not successfully
    // upload if they are too large based on PHP's settings so we will bail in this case.
    if ($value instanceof UploadedFile && ! $value->isValid() &&
        $this->hasRule($attribute, array_merge($this->fileRules, $this->implicitRules))
    ) {
        return $this->addFailure($attribute, 'uploaded', []);
    }
 
    // If we have made it this far we will make sure the attribute is validatable and if it is
    // we will call the validation method with the attribute. If a method returns false the
    // attribute is invalid and we will add a failure message for this failing attribute.
    $validatable = $this->isValidatable($rule, $attribute, $value);
 
    $method = "validate{$rule}";
 
    if ($validatable && ! $this->$method($attribute, $value, $parameters, $this)) {
        $this->addFailure($attribute, $rule, $parameters);
    }
}

　　主要是这两段

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$method = "validate{$rule}";
 
   if ($validatable && ! $this->$method($attribute, $value, $parameters, $this)) {
       $this->addFailure($attribute, $rule, $parameters);
   }

　　根据规则拼接验证函数名，再调用，函数都写在了最开始引用的Concerns\ValidatesAttributes

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use Concerns\FormatsMessages,
     Concerns\ValidatesAttributes;

　　vendor\illuminate\validation\Concerns\ValidatesAttributes.php

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namespace Illuminate\Validation\Concerns;
 
...
 
trait ValidatesAttributes
{
 
...
 
    /**
     * Validate that an attribute is numeric.(验证属性是数字的。)
     *
     * @param  string  $attribute
     * @param  mixed   $value
     * @return bool
     */
    protected function validateNumeric($attribute, $value)
    {
        return is_numeric($value);
    }
            return false;
        } elseif ($value instanceof File) {
            return (string) $value->getPath() != '';
        }
 
        return true;
    }
 
...
 
}

　这个就是刚才'required|numeric'的numeric对应执行的方法，不信可以在下面加上

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protected function validateMobile($attribute, $value, $parameters)
  {
      return preg_match("/^1[34578]{1}\d{9}$/",$value);
  }

　　把刚才的ValidateServiceProvider.php的启动注入注释掉

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public function boot()
    {
 
        //Validator::extend('mobile', function($attribute, $value, $parameters) {
            //return preg_match("/^1[34578]{1}\d{9}$/",$value);
        //});
 
      
    }

　　执行还是会验证，不过一般都是在外面注入，写在里面只是测试下。

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