CURLOPT_PROXY_SSL_CIPHER_LIST

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

CURLOPT_PROXY_SSL_CIPHER_LIST — A string with a colon-separated list of ciphers to use for the connection to the HTTPS proxy. When used with OpenSSL commas and spaces are also acceptable as separators, and !, - and + can be used as operators. Available as of PHP 7.3.0 and cURL 7.52.0.

CURLOPT_PROXY_SSL_CIPHER_LIST = 10259;