title: composer ssl certificate error in xampp 5.6 in centos
body: <p>I just installed xampp 5.6 and composer in my centos, but when i try to update composer "composer self-update" in gives me error like this</p>
  
  <pre><code>[Composer\Downloader\TransportException]                                     
    The "https://getcomposer.org/version" file could not be downloaded: SSL ope  
    ration failed with code 1. OpenSSL Error messages:                           
    error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify   
    failed                                                                       
    Failed to enable crypto                                                      
    failed to open stream: operation failed 
  </code></pre>
  
  <p>i googled and its tell me that openssl certificate is expired or can't find the cert.pem, i generate new certificate and place into path but didn't work for me</p>