Here's what's disabled:
getmyinode, getopt, getrusage, extension_loaded, dl, mysql_pconnect, crack_check, crack_closedict, crack_getlastmessage, crack_opendict, fsockopen, pfsockopen, mysql_list_dbs, mysql_stat, ini_get, ini_get_all, ini_alter, ini_set, get_current_user, get_defined_constants, get_include_path, php_ini_scanned_files, php_uname, phpcredits, restore_include_path, set_include_path, set_time_limit, version_compare, zend_version, getmypid, getmyuid, getmygid, assert_options, assert, fopen, fwrite, fread, file, fpassthru, file, mail, opendir, readdir, closedir