It seems that php uses the table from here: http://ascii-code.com/
(and not from here: http://www.asciitable.com/ as suggested in the documentation) for codes from 128 to 255.
<?php
for ($i = 32; $i <= 255; $i++) {
echo chr($i);
}
?>