zendframework/zend-validator
Powerful validation library from Zend Framework for PHP apps. Provides a wide range of reusable validators, input filtering, and custom rule support with clear error messages. Integrates easily into forms and domain validation workflows.
Zend\Validator\Timezone allows validating if an input string represents a
timezone.
The Zend\Validator\Timezone validator is capable of validating the
abbreviation (e.g. ewt) as well as the location string (e.g.
America/Los_Angeles). These options are stored in the validator as
LOCATION, ABBREVIATION, and ALL class constants.
The default validation type will check against abbreviations as well as the location string.
$validator = new Zend\Validator\Timezone();
$validator->isValid('America/Los_Angeles'); // returns true
$validator->isValid('ewt'); // returns true
$validator->isValid('Foobar'); // returns false
To validate against only the location string you can set the type:
use Zend\Validator\Timezone;
$validator = new Timezone();
$validator->setType(Timezone::LOCATION);
$validator->isValid('America/Los_Angeles'); // returns true
$validator->isValid('ewt'); // returns false
$validator->isValid('Foobar'); // returns false
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