The PHP code:
<?php
echo 'The PHP code:<br />';
highlight_file(__FILE__);

require 
'../bootstrap-stubbles.php';
stubClassLoader::load('net::stubbles::util::ext::stubXPClassLoader');
stubClassLoader::registerForeignClassLoader(new stubXPClassLoader());
stubClassLoader::load('net::xp_framework::text::String');
stubClassLoader::load('net::stubbles::util::ext::stubPearClassLoader');
stubClassLoader::registerForeignClassLoader(new stubPearClassLoader());
stubClassLoader::load('net::php::pear::XML::Serializer');
class 
Bootstrap
{
    public static function 
main()
    {
        echo 
'<br><br>The result:<br>';
        echo 
'<pre>';
        
$string = new String('foo');
        echo 
$string->toString();
        echo 
'<br />pear class XML_Serializer loaded: ';
        
var_dump(class_exists('XML_Serializer'));
    }
}
Bootstrap::main();
?>


The result:
foo
pear class XML_Serializer loaded: bool(true)