Laravel5.1：验证时间字段（开始时间应大于结束时间）

Question

I am new to Laravel.

I am trying to validate $start_time is greater than $end_time . They both are in a H:i format and are coming from database.

I had checked with the Laravel documentation and I got date_format:H:i for format.

Answer 1

Use a custom validator to validate it, to do so you need to define the new custome validator under the boot() function in the AppServiceProvider class. Check the documentation for the full description here :

public function boot()
{
    Validator::extend('date_is_greater', function($attribute, $value, $parameters, $validator) {
        return \Carbon\Carbon::createFromFormat($parameters[0],$value)->gt(\Carbon\Carbon::createFromFormat($parameters[0],$parameters[1]));
    });
}

In this case the format is passed as the first parameter "H:i" or whatever valid DateTime format, and the $start_time is the second parameter.