Add SSH2 connection sample

Author: peter279k

.travis.yml

@@ -9,5 +9,7 @@ before_script:
   - lsb_release -a
   - sudo apt-get update && sudo apt-get install libssh2-1 -y
   - echo "extension=ssh2.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
+  - ssh-keygen -N '' -f ~/.ssh/id_rsa
+  - cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
 
-script: php -m | grep ssh2
+script: php sample_connect.php

sample_connect.php

@@ -0,0 +1,11 @@
+<?php
+
+$connection = ssh2_connect('localhost', 22, ['hostkey'=>'ssh-rsa']);
+
+if (ssh2_auth_pubkey_file($connection, 'root',
+    '/home/travis/.ssh/id_rsa.pub',
+    '/home/travis/.ssh/id_rsa')) {
+  echo "Public Key Authentication Successful\n";
+} else {
+  die('Public Key Authentication Failed');
+}