TLS 1.2 not working in cURL

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You must use an integer value for the CURLOPT_SSLVERSION value, not a string as listed above

Try this:

curl_setopt ($setuploginurl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2); // constant NOT string value

http://php.net/manual/en/function.curl-setopt.php

value should be an integer for the following values of the option parameter:
CURLOPT_SSLVERSION

One of:

CURL_SSLVERSION_DEFAULT (0)
CURL_SSLVERSION_TLSv1 (1)
CURL_SSLVERSION_SSLv2 (2)
CURL_SSLVERSION_SSLv3 (3)
CURL_SSLVERSION_TLSv1_0 (4)
CURL_SSLVERSION_TLSv1_1 (5)
CURL_SSLVERSION_TLSv1_2 (6)

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