constants_curlproto CURLPROTO_ALL ( int) Available as of cURL 7.19.4. CURLPROTO_DICT ( int) Available as of cURL 7.19.4. CURLPROTO_FILE ( int) Available as of cURL 7.19.4. CURLPROTO_FTP ( int) Available as of cURL 7.19.4. CURLPROTO_FTPS ( int) Available as of cURL 7.19.4. CURLPROTO_GOPHER ( int) Available as of cURL 7.21.2. CURLPROTO_HTTP ( int) Available as of cURL 7.19.4. CURLPROTO_HTTPS ( int) Available as of cURL 7.19.4. CURLPROTO_IMAP ( int) Available as of cURL 7.20.0. CURLPROTO_IMAPS ( int) Available as of cURL 7.20.0. CURLPROTO_LDAP ( int) Available as of cURL 7.19.4. CURLPROTO_LDAPS ( int) Available as of cURL 7.19.4. CURLPROTO_MQTT ( int) Available as of PHP 8.2.0 and cURL 7.71.0. CURLPROTO_POP3 ( int) Available as of cURL 7.20.0. CURLPROTO_POP3S ( int) Available as of cURL 7.20.0. CURLPROTO_RTMP ( int) Available as of cURL 7.21.0. CURLPROTO_RTMPE ( int) Available as of cURL 7.21.0. CURLPROTO_RTMPS ( int) Available as of cURL 7.21.0. CURLPROTO_RTMPT ( int) Available as of cURL 7.21.0. CURLPROTO_RTMPTE ( int) Available as of cURL 7.21.0. CURLPROTO_RTMPTS ( int) Available as of cURL 7.21.0. CURLPROTO_RTSP ( int) Available as of cURL 7.20.0. CURLPROTO_SCP ( int) Available as of cURL 7.19.4. CURLPROTO_SFTP ( int) Available as of cURL 7.19.4. CURLPROTO_SMB ( int) Available as of PHP 7.0.7 and cURL 7.40.0. CURLPROTO_SMBS ( int) Available as of PHP 7.0.7 and cURL 7.40.0. CURLPROTO_SMTP ( int) Available as of cURL 7.20.0. CURLPROTO_SMTPS ( int) Available as of cURL 7.20.0. CURLPROTO_TELNET ( int) Available as of cURL 7.19.4. CURLPROTO_TFTP ( int) Available as of cURL 7.19.4.