how to call api using curl method
// create & initialize a curl session
$curl = curl_init();
// set our url with curl_setopt()
curl_setopt($curl, CURLOPT_URL, "api.example.com");
// return the transfer as a string, also with setopt()
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
// curl_exec() executes the started curl session
// $output contains the output string
$output = curl_exec($curl);
// close curl resource to free up system resources
// (deletes the variable made by curl_init)
curl_close($curl);