[李景山php]每天laravel-20161011|Validator.php-11

/**
* Given two date/time strings, check that one is after the other.
*
* @param  string  $format
* @param  string  $before
* @param  string  $after
* @return bool
*/
protected function checkDateTimeOrder($format, $before, $after)
{
$before = $this->getDateTimeWithOptionalFormat($format, $before);// format it

$after = $this->getDateTimeWithOptionalFormat($format, $after);// format after

return ($before && $after) && ($after > $before);// a big logic
}// get two date/time strings, check that one is after the other.

/**
* Get a DateTime instance from a string.
*
* @param  string  $format
* @param  string  $value
* @return \DateTime|null
*/
protected function getDateTimeWithOptionalFormat($format, $value)
{//Get a DateTime instance from a sting.
$date = DateTime::createFromFormat($format, $value);//Date::createFromFormat

if ($date) {// if date
return $date;
}

try {// return new DateTime
return new DateTime($value);
} catch (Exception $e) {
// do nothing
}
}

/**
* Validate that an attribute is a valid timezone.
*
* @param  string  $attribute
* @param  mixed   $value
* @return bool
*/
protected function validateTimezone($attribute, $value)
{
try {
new DateTimeZone($value);
} catch (Exception $e) {
return false;
}

return true;
}//validate timezone

/**
* Get the date format for an attribute if it has one.
*
* @param  string  $attribute
* @return string|null
*/
protected function getDateFormat($attribute)
{
if ($result = $this->getRule($attribute, 'DateFormat')) {
return $result[1][0];
}
}// Get the date format from an attribute if it has one.

/**
* Get the validation message for an attribute and rule.
*
* @param  string  $attribute
* @param  string  $rule
* @return string
*/
protected function getMessage($attribute, $rule)
{
$lowerRule = Str::snake($rule);// use snake method to get this you  want

$inlineMessage = $this->getInlineMessage($attribute, $lowerRule);// get message

// First we will retrieve the custom message for the validation rule if one
// exists. If a custom validation message is being used we'll return the
// custom message, otherwise we'll keep searching for a valid message.
if (! is_null($inlineMessage)) {
return $inlineMessage;
}// if it is a good message

$customKey = "validation.custom.{$attribute}.{$lowerRule}";// this can  get a good key

$customMessage = $this->getCustomMessageFromTranslator($customKey);

// First we check for a custom defined validation message for the attribute
// and rule. This allows the developer to specify specific messages for
// only some attributes and rules that need to get specially formed.
if ($customMessage !== $customKey) {
return $customMessage;
}// return the custom message

// If the rule being validated is a "size" rule, we will need to gather the
// specific error message for the type of attribute being validated such
// as a number, file or string which all have different message types.
elseif (in_array($rule, $this->sizeRules)) {
return $this->getSizeMessage($attribute, $rule);
}// specific error

// Finally, if no developer specified messages have been set, and no other
// special messages apply for this rule, we will just pull the default
// messages out of the translator service for this validation rule.
$key = "validation.{$lowerRule}";

if ($key != ($value = $this->translator->trans($key))) {
return $value;
}// just message

return $this->getInlineMessage(
$attribute, $lowerRule, $this->fallbackMessages
) ?: $key;// return key
}