Validator.php-3

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 /**

    * Validate a given attribute against a rule.

    *

    * @param  string  $attribute

    * @param  string  $rule

    * @return void

    */

   protected function validate($attribute, $rule)

   {// validate a given attribute against a rule.

       list($rule, $parameters) = $this->parseRule($rule);//list function to get the

       if ($rule == ”) {

           return;

       }// if no rule

       // First we will get the numeric 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 numeric keys.

       if (($keys = $this->getNumericKeys($attribute)) &&

           $this->dependsOnOtherFields($rule)) {//get number and depends

           $parameters = $this->replaceAsterisksInParameters($parameters, $keys);

       }// a normal logic function

       // We will get the value for the given attribute from the array of data and then

       // verify that the attribute is indeed validatable. Unless the rule implies

       // that the attribute is required, rules are not run for missing values.

       $value = $this->getValue($attribute);

    // We will get the value for the given attribute from the array of data and then

    // verify that the attribute is indeed vaidatable.Unless the rule implies

    // that the attribute is required,rules are not run for missing values.

       $validatable = $this->isValidatable($rule, $attribute, $value);

    // determine validatable

       $method = “validate{$rule}”;// get method way

       if ($validatable && ! $this->$method($attribute, $value, $parameters, $this)) {

           $this->addFailure($attribute, $rule, $parameters);

       }// determine all

   }

   /**

    * Returns the data which was valid.

    *

    * @return array

    */

   public function valid()

   {

       if (! $this->messages) {

           $this->passes();

       }

       return array_diff_key($this->data, $this->messages()->toArray());

   }// change it is a real valid data

   /**

    * Returns the data which was invalid.

    *

    * @return array

    */

   public function invalid()

   {

       if (! $this->messages) {

           $this->passes();

       }//if do not has messages get passes

       return array_intersect_key($this->data, $this->messages()->toArray());// return array_intersect_key

   }// a invalid method

   /**

    * Get the value of a given attribute.

    *

    * @param  string  $attribute

    * @return mixed

    */

   protected function getValue($attribute)

   {

       if (! is_null($value = Arr::get($this->data, $attribute))) {// type1

           return $value;// return value

       } elseif (! is_null($value = Arr::get($this->files, $attribute))) {//type2

           return $value;// return value

       }

   }//Get the value of a given attribute

   /**

    * Determine if the attribute is validatable.

    *

    * @param  string  $rule

    * @param  string  $attribute

    * @param  mixed   $value

    * @return bool

    */

   protected function isValidatable($rule, $attribute, $value)

   {

       return $this->presentOrRuleIsImplicit($rule, $attribute, $value) &&

              $this->passesOptionalCheck($attribute) &&

              $this->hasNotFailedPreviousRuleIfPresenceRule($rule, $attribute);

    //three type determine this value.

   }//determine if the attribute is validatable.

   /**

    * Determine if the field is present, or the rule implies required.

    *

    * @param  string  $rule

    * @param  string  $attribute

    * @param  mixed   $value

    * @return bool

    */

   protected function presentOrRuleIsImplicit($rule, $attribute, $value)

   {

       return $this->validateRequired($attribute, $value) || $this->isImplicit($rule);

    // this validateRequired

   }//Determine if the field is present, or the rule implies required.

   /**

    * Determine if the attribute passes any optional check.

    *

    * @param  string  $attribute

    * @return bool

    */

   protected function passesOptionalCheck($attribute)

   {

       if ($this->hasRule($attribute, [‘Sometimes’])) {

           return array_key_exists($attribute, Arr::dot($this->data))

               || in_array($attribute, array_keys($this->data))

               || array_key_exists($attribute, $this->files);

       }// this->hasRule($attribute)

       return true;

   }// passes Optional Check

   /**

    * Determine if a given rule implies the attribute is required.

    *

    * @param  string  $rule

    * @return bool

    */

   protected function isImplicit($rule)

   {

       return in_array($rule, $this->implicitRules);

   }// check it is a implicit

// in_array

// sorry today,we need to make a very important PPT, so done.

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