CODEWITHSUNDEEP
phpcurl
Gkra
Gkra

Reputation: 11

Error - PHP - cURL - Unknown SSL protocol error in connection -

$ch = curl_init();
curl_setopt ($ch, CURLOPT_URL, $xml_url);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_HEADER, false);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 0);

$xml = curl_exec($ch);

if(curl_exec($ch) === false) 
{ echo curl_error($ch); }
else 
{ echo 'Operation completed without any errors'; }

curl_close($ch);
return $xml;

Above code is giving below error.

Unknown SSL protocol error in connection to api.site.com:443

As per suggested by many people that below code will resolve above issue but it is not helping. Still getting same error. 

curl_setopt ($ch, CURLOPT_SSLVERSION, 3);

I tried below also as per suggestions but still getting same error. 

curl_setopt ($ch, CURLOPT_SSLVERSION, 'CURL_SSLVERSION_SSLv3' );

Please suggest what else I should put in code to fix this error.

Thank you,

Upvotes: 1

Views: 4722

Answers (1)

Belle-P
Belle-P

Reputation: 51

You could check which TLS version the website uses with curl verbose mode:

curl_setopt($curl, CURLOPT_VERBOSE, true);

Where the output will be like this: 

...
SSL connection using TLS1.0 / RSA_3DES_EDE_CBC_SHA1
...

Then set CURLOPT_SSL_CIPHER_LIST like this:

curl_setopt($curl, CURLOPT_SSL_CIPHER_LIST, "TLSv1");

Where "TLSv1" is the TLS version the website uses.

Changing SSL version and VERIFY_PEER/HOST in curl options didn't solve my problem, but this approach did.

Upvotes: 1

Related Questions