PMA\libraries\dbi\DBIMysqli::fieldFlags PHP Method

    public function fieldFlags($result, $i)
    {
        $f = mysqli_fetch_field_direct($result, $i);
        $type = $f->type;
        $charsetnr = $f->charsetnr;
        $f = $f->flags;
        $flags = array();
        foreach ($GLOBALS['pma_mysqli_flag_names'] as $flag => $name) {
            if ($f & $flag) {
                $flags[] = $name;
            }
        }
        // See https://dev.mysql.com/doc/refman/6.0/en/c-api-datatypes.html:
        // to determine if a string is binary, we should not use MYSQLI_BINARY_FLAG
        // but instead the charsetnr member of the MYSQL_FIELD
        // structure. Watch out: some types like DATE returns 63 in charsetnr
        // so we have to check also the type.
        // Unfortunately there is no equivalent in the mysql extension.
        if (($type == MYSQLI_TYPE_TINY_BLOB || $type == MYSQLI_TYPE_BLOB || $type == MYSQLI_TYPE_MEDIUM_BLOB || $type == MYSQLI_TYPE_LONG_BLOB || $type == MYSQLI_TYPE_VAR_STRING || $type == MYSQLI_TYPE_STRING) && 63 == $charsetnr) {
            $flags[] = 'binary';
        }
        return implode(' ', $flags);
    }