title: ssh2_connect is undefined on debian
body: <p>i have several server in debian 6.0.8 with php version at 5.3.28-1~dotdeb.0.</p>
  
  <p>I have made an apt-get install libssh2-php on each.
  When u made an php -v, i have openssl and ssh2 in the list on each.
  I have already restarted apache after that.</p>
  
  <p>But when i run a php script with ssh2_connect() call, it doesnt' work on 2 servers but it works on the other server.</p>
  
  <p>I have the error : "call to undefined function ssh2_connect()."</p>
  
  <p>I don't understand, debian version and php version are the same.
  Can you help me ?
  Thanks.</p>