# secure install page
<Files install.php>
  # Apache < 2.3
    <IfModule !mod_authz_core.c>
      Order allow,deny
      Deny from all
      Satify All
    </IfModule>
  
  # Apache >= 2.3
    <IfModule mod_authz_core.c>
      Require all denied
    </IfModule>

</Files>