CURLOPT_SOCKS5_AUTH

CURLOPT_SOCKS5_AUTH is one of the accepted parameters for curl_setopt parameter #2.

CURLOPT_SOCKS5_AUTH — The SOCKS5 authentication method(s) to use. The options are: . When more than one method is set, cURL will poll the server to see what methods it supports and pick the best one. Defaults to CURLAUTH_BASIC|CURLAUTH_GSSAPI. Set the actual username and password with the CURLOPT_PROXYUSERPWD option. Available as of PHP 7.3.0 and cURL 7.55.0.

CURLOPT_SOCKS5_AUTH = 267;