Unable to get refresh Token

*I am trying to run my adwords but everytime I try to execute the GetRefreshToken.php file on my server I get the following error* quot;Warning: Error parsing ../aw/src/Google/Api/Ads/AdWords/Lib/api.properties on line 14 in .. /aw/src/Google/Api/Ads/Common/Util/ApiPropertiesUtils.php on

Enable SOAP in PHP

I am trying to create a new campaign to test my adwords account and it says to me *Use of undefined constant WSDL_CACHE_NONE - assumed 'WSDL_CACHE_NONE' in ..test_google_ads/aw/src/Google/Api/Ads/Common/Lib/AdsUser.php on line 231* *Fatal error: This client library requires the SOAP extension

Unable to get refresh Token

*I am trying to run my adwords but everytime I try to execute the GetRefreshToken.php file on my server I get the following error* quot;Warning: Error parsing ../googleads-php-lib-master/src/Google/Api/Ads/AdWords/Lib/api.properties on line 14 in ..