Frequent problems
Frequent problems – List of issues that may be encountered when using PHP_UML
Class 'XSLTProcessor' not found in (...) ExporterXSL.php on line 192
PHP_UML relies on the PHP extension XSL for certain output formats. Please modify your php.ini to enable this extension.
Warning: date(): it is not safe to rely on the system's timezone settings (...)
You can ignore this warning. If you really don't want to see it, add a "date.timezone" configuration line in your php.ini
Error message when importing XMI into Umbrello or ArgoUML
Some modeling tools expect XMI in version 1. By default, PHP_UML generates XMI in version 2. So use the switch -x to specify the version 1, as described in Command line interface