(PHP >= 5.4.0)
XsltProcessor::setSecurityPrefs — Set security preferences
$securityPrefs
   )Sets the security preferences.
securityPrefs
       The new security preferences. The following constants can be ORed:
       XSL_SECPREF_READ_FILE,
       XSL_SECPREF_WRITE_FILE,
       XSL_SECPREF_CREATE_DIRECTORY,
       XSL_SECPREF_READ_NETWORK,
       XSL_SECPREF_WRITE_NETWORK. Alternatively,
       XSL_SECPREF_NONE or
       XSL_SECPREF_DEFAULT can be passed.
      
Returns the old security preferences.