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michalbundyra committed Mar 14, 2020
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238 changes: 238 additions & 0 deletions docs/book/validators/date-time.md
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# DateTime

`Laminas\I18n\Validator\DateTime` allows you to determine if a given value **is a
valid date, time or datetime**.
Internally, PHP's `IntlDateFormatter` tries to create a date time for the given
value.

## Basic Usage

```php
$validator = new Laminas\I18n\Validator\DateTime();

var_dump($validator->isValid('20190228 10:00 pm')); // true
var_dump($validator->isValid('20190229 10:00 pm')); // false
var_dump($validator->isValid('20200229 10:00 pm')); // true
```

By default, if no locale is provided, `DateTime` will use the system locale
provided by PHP's `Locale::getDefault()` and the default timezone provided
by PHP's `date_default_timezone_get`.

(The above example assumes that the environment locale is set to `en_EN` and
the timezone is set to `Europe/London`.)

## Set Locale

```php fct_label="Constructor Usage"
$validator = new Laminas\I18n\Validator\DateTime(['locale' => 'de']);

var_dump($validator->isValid('29.02.2020')); // true
```

```php fct_label="Setter Usage"
$validator = new Laminas\I18n\Validator\DateTime();
$validator->setLocale('de');

var_dump($validator->isValid('29.02.2020')); // true
```

### Get Current Value

To get the current value of this option, use the `getLocale()` method.

```php
$validator = new Laminas\I18n\Validator\DateTime(['locale' => 'en_US']);

echo $validator->getLocale(); // 'en_US'
```

### Default Value

By default, if no locale is provided, `DateTime` will use the system locale
provided by PHP's `Locale::getDefault()`.

## Define Custom Pattern

```php fct_label="Constructor Usage"
$validator = new Laminas\I18n\Validator\DateTime(['pattern' => 'yyyy-MM-DD']);

var_dump($validator->isValid('2019-02-28')); // true
```

```php fct_label="Setter Usage"
$validator = new Laminas\I18n\Validator\DateTime();
$validator->setPattern('yyyy-MM-DD');

var_dump($validator->isValid('2019-02-28')); // true
```

Possible patterns are documented at
[http://userguide.icu-project.org/formatparse/datetime](http://userguide.icu-project.org/formatparse/datetime).

### Get Current Value

To get the current value of this option, use the `getPattern()` method.

```php
$validator = new Laminas\I18n\Validator\DateTime(['pattern' => 'yyyy-MM-DD']);

echo $validator->getPattern(); // 'yyyy-MM-DD'
```

### Default Value

The default value of this option is `null`.

## Using Date Type

```php fct_label="Constructor Usage"
$validator = new Laminas\I18n\Validator\DateTime(['date_type' => IntlDateFormatter::MEDIUM]);

var_dump($validator->isValid('Feb 28, 2020')); // true
```

```php fct_label="Setter Usage"
$validator = new Laminas\I18n\Validator\DateTime();
$validator->setDateType(IntlDateFormatter::MEDIUM);

var_dump($validator->isValid('Feb 28, 2020')); // true
```

Possible values for the date type option are the following
[constants of PHP's `IntlDateFormatter` class](https://www.php.net/manual/class.intldateformatter.php#intl.intldateformatter-constants):

* `IntlDateFormatter::NONE` - Do not include this element
* `IntlDateFormatter::FULL` - Fullstyle (Tuesday, April 12, 1952 AD)
* `IntlDateFormatter::LONG` - Long style (January 12, 1952)
* `IntlDateFormatter::MEDIUM` - Medium style (Jan 12, 1952)
* `IntlDateFormatter::SHORT` - Short style (12/13/52)

### Get Current Value

To get the current value of this option, use the `getDateType()` method.

```php
$validator = new Laminas\I18n\Validator\DateTime(['date_type' => IntlDateFormatter::MEDIUM]);

echo $validator->getDateType(); // 'MMM d, y' (IntlDateFormatter::MEDIUM)
```

### Default Value

The default value of this option is `IntlDateFormatter::NONE`.

## Using Time Type

Sets time type to use (none, short, medium, long, full).

```php fct_label="Constructor Usage"
$validator = new Laminas\I18n\Validator\DateTime(['time_type' => IntlDateFormatter::MEDIUM]);

var_dump($validator->isValid('8:05:40 pm')); // true
```

```php fct_label="Setter Usage"
$validator = new Laminas\I18n\Validator\DateTime();
$validator->setTimeType(IntlDateFormatter::MEDIUM);

var_dump($validator->isValid('8:05:40 pm')); // true
```

Possible values for the date type option are the following
[constants of PHP's `IntlDateFormatter` class](https://www.php.net/manual/class.intldateformatter.php#intl.intldateformatter-constants):

* `IntlDateFormatter::NONE` - Do not include this element
* `IntlDateFormatter::FULL` - Fullstyle (3:30:42pm PST)
* `IntlDateFormatter::LONG` - Long style (3:30:32pm)
* `IntlDateFormatter::MEDIUM` - Medium style (3:30:32pm)
* `IntlDateFormatter::SHORT` - Short style (3:30pm)

### Get Current Value

To get the current value of this option, use the `getTimeType()` method.

```php
$validator = new Laminas\I18n\Validator\DateTime(['time_type' => IntlDateFormatter::MEDIUM]);

echo $validator->getTimeType(); // 'h:mm:ss a' (IntlDateFormatter::MEDIUM)
```

### Default Value

The default value of this option is `IntlDateFormatter::NONE`.

## Using Calendar

To demonstrate the calendar option, additional settings are needed.

```php fct_label="Constructor Usage"
$validator = new Laminas\I18n\Validator\DateTime([
'calendar' => IntlDateFormatter::TRADITIONAL,
'date_type' => IntlDateFormatter::MEDIUM,
'locale' => 'de_DE@calendar=buddhist',
'timezone' => 'Europe/Berlin',
]);

var_dump($validator->isValid('28.02.2562 BE')); // true
```

```php fct_label="Setter Usage"
$validator = new Laminas\I18n\Validator\DateTime();
$validator->setCalendar(IntlDateFormatter::TRADITIONAL);
$validator->setDateType(IntlDateFormatter::MEDIUM);
$validator->setLocale('de_DE@calendar=buddhist');
$validator->setTimezone('Europe/Berlin');

var_dump($validator->isValid('28.02.2562 BE')); // true
```

Possible values for the calendar option are the following
[constants of PHP's `IntlDateFormatter` class](https://www.php.net/manual/class.intldateformatter.php#intl.intldateformatter-constants):

* `IntlDateFormatter::TRADITIONAL` - Non-Gregorian Calendar
* `IntlDateFormatter::GREGORIAN` - Gregorian Calendar

### Get Current Value

To get the current value of this option, use the `getCalendar()` method.

```php
$validator = new Laminas\I18n\Validator\DateTime(['calendar' => IntlDateFormatter::TRADITIONAL]);

echo $validator->getCalendar(); // '0' (IntlDateFormatter::TRADITIONAL)
```

### Default Value

The default value of this option is `IntlDateFormatter::GREGORIAN`.

## Using Timezone

```php fct_label="Constructor Usage"
$validator = new Laminas\I18n\Validator\DateTime(['timezone' => 'Europe/London']);

var_dump($validator->isValid('20190228 10:00 pm')); // true
```

```php fct_label="Setter Usage"
$validator = new Laminas\I18n\Validator\DateTime();
$validator->setTimezone('Europe/London');

var_dump($validator->isValid('20190228 10:00 pm')); // true
```

### Get Current Value

To get the current value of this option, use the `getTimezone()` method.

```php
$validator = new Laminas\I18n\Validator\DateTime(['timezone' => 'Europe/London']);

echo $validator->getTimezone(); // 'Europe/London'
```

### Default Value

By default, if no timezone is provided, `DateTime` will use the system timezone
provided by PHP's `date_default_timezone_get()`.
1 change: 1 addition & 0 deletions mkdocs.yml
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ nav:
- Filters: filters.md
- Validators:
- 'Standard Validators': validators.md
- DateTime: validators/date-time.md
- PhoneNumber: validators/phone-number.md
site_name: laminas-i18n
site_description: 'Provide translations for your application, and filter and validate internationalized values.'
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