How to Get IANA/Olsen Time Zones for a Country in PHP

Using the free API solution provided in this article, you can easily get time zones for an input country (country name OR country code) in a single request. For example, the input “France” will return the following response:

{
  "Successful": true,
  "CountryFullName": "France",
  "ISOTwoLetterCode": "FR",
  "FIPSTwoLetterCode": "FR",
  "ThreeLetterCode": "FRA",
  "Timezones": [
    {
      "Name": "Romance Standard Time",
      "BaseUTCOffset": "01:00:00",
      "Now": "2023-04-19T16:42:47.4053979"
    }
  ]
}

To take advantage of this API, you can start by installing the client SDK. Run the following command to do so:

composer require cloudmersive/cloudmersive_validate_api_client

After that, copy the below code examples to structure your API call:

<?php
require_once(__DIR__ . '/vendor/autoload.php');

// Configure API key authorization: Apikey
$config = Swagger\Client\Configuration::getDefaultConfiguration()->setApiKey('Apikey', 'YOUR_API_KEY');



$apiInstance = new Swagger\Client\Api\AddressApi(
    
    
    new GuzzleHttp\Client(),
    $config
);
$input = new \Swagger\Client\Model\GetTimezonesRequest(); // \Swagger\Client\Model\GetTimezonesRequest | Input request

try {
    $result = $apiInstance->addressGetTimezone($input);
    print_r($result);
} catch (Exception $e) {
    echo 'Exception when calling AddressApi->addressGetTimezone: ', $e->getMessage(), PHP_EOL;
}
?>

Now provide a free-tier API key to authenticate, and you’re good to go! That’s all there is to it.