'default', 'version' => '2014-11-01', 'region' => 'us-east-2' ]); $ciphertext = 'Place your cipher text blob here'; try { $result = $KmsClient->decrypt([ 'CiphertextBlob' => $ciphertext, ]); $plaintext = $result['Plaintext']; var_dump($plaintext); } catch (AwsException $e) { // Output error message if fails echo $e->getMessage(); echo "\n"; } // snippet-end:[kms.php.decrypt.main] // snippet-end:[kms.php.decrypt.complete]