//Before (failing):
echo "<input maxlength='100' name='forenames' size='15' title='Firstnames (or initials)' value='{$contactobj->forenames}' />\n";
echo "<input maxlength='100' name='surname' size='20' title='{$strSurname}' value='{$contactobj->surname}' />";


//After (working):
echo '<input maxlength="100" name="forenames" size="15" title="Firstnames (or initials)" value="'.$contactobj->forenames.'"'." />\n";
echo '<input maxlength="100" name="surname" size="20" title="'.$strSurname.'" value="'.$contactobj->surname.'"'." />";