(PHP 4 >= 4.2.0, PHP 5)
openssl_pkey_get_public — Extract public key from certificate and prepare it for use
   openssl_get_publickey() extracts the public key from
   certificate and prepares it for use by other
   functions.
  
certificate
       certificate can be one of the following:
       
   Returns a positive key resource identifier on success, or FALSE on error.