php-AccessingSwiftCodeIFSCCodesAPI,PhpScriptError

I am trying to access swift codes, ifsc codes, micr codes data from this free API, they have given this sample php code to access the data in JSON format.

unction get_ifsc_code($url, $curl = true) { $responseString = ''; if (!$curl) { /* * if !$curl, use 'file_get_contents' method * to get response string / $responseString = file_get_contents($url); } else { / * if $curl, use 'curl' method * to get response string */

// Initializing curl$ch = curl_init( $url );// Configuring curl options$options = array(    CURLOPT_RETURNTRANSFER => true,    CURLOPT_HTTPHEADER => array('Content-type: application/json') ,    //Could be xml);// Setting curl optionscurl_setopt_array( $ch, $options );// Getting JSON encoded string$responseString =  curl_exec($ch);

}
return $responseString;
}
Refer this github code
Sample code from the official site

Please help me in finding the error. I am not getting where it's going wrong.