CURL_SSLVERSION_MAX_TLSv1_0

CURL_SSLVERSION_MAX_TLSv1_0 is one of the accepted parameters for curl_setopt parameter #3 (optionally as a bitmask).

CURL_SSLVERSION_MAX_TLSv1_0 — Available as of PHP 7.3.0 and cURL 7.54.0

CURL_SSLVERSION_MAX_TLSv1_0 = 262144;