<?php

ini_set("intl.error_level", E_WARNING);
var_dump(IntlTimeZone::getCanonicalID('Portugal', $isSystemId));
var_dump($isSystemId);
var_dump(IntlTimeZone::getCanonicalID('GMT +01:25', $isSystemId));
var_dump($isSystemId);
?>
==DONE==
<?php

ini_set("intl.error_level", E_WARNING);
print_R(IntlTimeZone::getCanonicalID('Portugal'));
echo "\n";
print_R(intltz_get_canonical_id('Portugal'));
echo "\n";
?>
==DONE==