cURL错误：无法连接：已禁用SSL。 错误号码35

Question

I am working on the paypal ipn script in one of my applications hosted on a Digital Ocean's box with Centos 7.

When i try to connect to the paypal sandbox api i get the error "Cannot connect: SSL is disabled."

I have tried several things like adding the path of the curl.cainfo in my php.ini file like so
curl.cainfo = /etc/pki/tls/certs/ca-bundle.trust.crt

this is what my cURL script looks like

// STEP 2: Post IPN data back to paypal to validate

$ch = curl_init('https://www.sandbox.paypal.com/cgi-bin/webscr'); // change to [...]sandbox.paypal[...] when using sandbox to test
curl_setopt($ch, CURLOPT_SSLVERSION, 4);
curl_setopt($ch, CURLOPT_SSL_CIPHER_LIST, 'ecdhe_rsa_aes_128_gcm_sha_256'); 
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

I have not got much experience with Linux server setup so I am learning as i go along. Any help or guide is much appreciated

UPDATE : when i run the this command in the command line curl --version https://sandbox.paypal.com/cgi-bin/webscr

i get this error curl: (1) Protocol "https" not supported or disabled in libcurl

Also the command curl --version displays curl 7.42.1 (x86_64-unknown-linux-gnu) libcurl/7.46.0

So i am guessing the new question would be how to enable https in libcurl?

Answer 1

I was able to solve this problem with the help of one my friends with a lot of Linux experience. Apparently this was an issue with the version of cURL installed on my Digital Ocean box.

So the solution was to remove the version of cURL i had installed which was not installed correctly because i had built the binaries my self.

I installed the problematic cURL using these commands

wget -O curl.tar.gz http://curl.haxx.se/download/curl-7.42.0.tar.gz
tar -xvzf curl.tar.gz
cd curl-7.42.0
 ./configure 
make
make install

I removed the problematic cURL that had https issues like this

which curl

(To tell me where the executable was located and it was located in usr/local/bin/curl)

Then i did

sudo rm -f /usr/local/bin/curl

(To remove the cURL giving issues)

Then i used the command

sudo yum install curl php5-curl

This installed cURL correctly for me. The i ran

 curl --version

To confirm that https is now supported in the cURL version and it was.

I logged out of my droplet and logged back in. Then tried the

curl --version "https://sandbox.paypal.com/cgi-bin/webscr" 

command and everything worked. I was able to connect to Paypal.

Thanks to everyone for their help and comments.