Error validating date with Carbon?

Question

I’m doing a test and passing an invalid date for a Carbon method.

$data = Carbon::createFromFormat('d/m/Y', '06/17/2010');

As you can see, the method creates from the pattern d/m/y (brazilian standard), thus the date given as argument is invalid as the month value is greater than 12.

I figured some error message would appear, but nothing appears if I try to see what is in the variable $data, a formatted date appears when it is a valid date, works normally.

The result when executing the above code line is:

2011-05-06 16:57:13.0 America/Sao_Paulo (-03:00)

Why this behavior of Carbon?

Answer 1

When using this command it needs to be checked if there has been an error with the method getLastErrors() that by that date informed 06/17/2010 has the following result:

>>> $data = \Carbon\Carbon::createFromFormat('d/m/Y', '06/17/2010');
=> Carbon\Carbon {#1031
     +"date": "2011-05-06 00:46:30.000000",
     +"timezone_type": 3,
     +"timezone": "America/Sao_Paulo",
   }
>>> \Carbon\Carbon::getLastErrors()
=> [
     "warning_count" => 1,
     "warnings" => [
       10 => "The parsed date was invalid",
     ],
     "error_count" => 0,
     "errors" => [],
   ]
>>>

then, in addition to using the method createFromFormat, right after you need to call the method getLastErrors() and with its array of checking information warning_count and error_count if they are equal to zero, if they are not have problems in date.

Sample code:

$data = Carbon::createFromFormat('d/m/Y', '06/17/2010');
$error = Carbon::getLastErrors();
if ($error['error_count'] === 0 && $error['warning_count'] === 0) 
{
    //data válida
}
else
{
    //data inválida
}

It is also worth remembering that the Carbon class inherits class behaviors Datetime which has the same method Datetime::createFromFormat, which explains the problems and errors encountered in a date by the same method Datetime::getLastErrors().

If you only want to check if the date is valid you can use the function date_parse_from_format as follows:

$errors = date_parse_from_format('d/m/Y','06/17/2010')

which returns virtually the same information as the method getLastErrors(), example:

=> [
     "year" => 2010,
     "month" => 17,
     "day" => 6,
     "hour" => false,
     "minute" => false,
     "second" => false,
     "fraction" => false,
     "warning_count" => 1,
     "warnings" => [
       10 => "The parsed date was invalid",
     ],
     "error_count" => 0,
     "errors" => [],
     "is_localtime" => false,
   ]

ie, check error_count and warning_count if both are of the value 0 to date is valid, if it’s bigger than 0 any one to date is not valid.