# curl -u admin:admin -H "X-Requested-By: ambari" -X GET “http://node1.example.com:8080/api/v1/clusters/HDP_TEST/services/“
curl: (1) Protocol “http not supported or disabled in libcurl
It’s a tipical curl_php error, but, the error response is not very, ehmmmm easy to deduce. It’s simple, surely there is an extra space before ‘http’, so check the CURLOPT_URL declaration, and search for this space, and then, delete it!!!!
Make sure the syntax of double quotes is correct. This also leads to the error.