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# Braintree PHP Client Library
The Braintree PHP library provides integration access to the Braintree Gateway.
## Dependencies
PHP version >= 5.4.0 is required.
The following PHP extensions are required:
* curl
* dom
* hash
* openssl
* xmlwriter
## Quick Start Example
```php
<?php
require_once 'PATH_TO_BRAINTREE/lib/Braintree.php';
Braintree_Configuration::environment('sandbox');
Braintree_Configuration::merchantId('your_merchant_id');
Braintree_Configuration::publicKey('your_public_key');
Braintree_Configuration::privateKey('your_private_key');
$result = Braintree_Transaction::sale(array(
'amount' => '1000.00',
'creditCard' => array(
'number' => '5105105105105100',
'expirationDate' => '05/12'
)
));
if ($result->success) {
print_r("success!: " . $result->transaction->id);
} else if ($result->transaction) {
print_r("Error processing transaction:");
print_r("\n code: " . $result->transaction->processorResponseCode);
print_r("\n text: " . $result->transaction->processorResponseText);
} else {
print_r("Validation errors: \n");
print_r($result->errors->deepAll());
}
?>
```
## HHVM Support
The Braintree PHP library will run on HHVM >= 3.4.2.
## Legacy PHP Support
Version [2.40.0](https://github.com/braintree/braintree_php/releases/tag/2.40.0) is compatible with PHP 5.2 and 5.3. You can find it on our releases page.
## Documentation
* [Official documentation](https://developers.braintreepayments.com/php/sdk/server/overview)
## Testing
Tests are written in PHPunit (installed by composer). Unit tests should run on
any system meeting the base requirements:
phpunit tests/unit/
Please note that the integration tests require access to services internal to
Braintree, and so will not run in your test environment.
## Open Source Attribution
A list of open source projects that help power Braintree can be found [here](https://www.braintreepayments.com/developers/open-source).
## License
See the LICENSE file.