Database Reference
In-Depth Information
$color
=
htmlspecialchars
(
$color
);
printf
(
'<option value="%s">%s</option>'
,
$color
,
$color
);
}
print
(
"</select>
\n
"
);
Python code to do the same is similar:
stmt
=
"SELECT color FROM cow_color ORDER BY color"
cursor
=
conn
.
cursor
()
cursor
.
execute
(
stmt
)
print
(
'<select name="color">'
)
for
(
color
, )
in
cursor
:
color
=
cgi
.
escape
(
color
,
1
)
print
(
'<option value="
%s
">
%s
</option>'
%
(
color
,
color
))
print
(
'</select>'
)
cursor
.
close
()
The state list requires different values and labels, so the code is slightly more complex.
In PHP, it looks like this:
$stmt
=
"SELECT abbrev, name FROM states ORDER BY name"
;
$sth
=
$dbh
->
query
(
$stmt
);
print
(
'<select name="state">'
);
while
(
$row
=
$sth
->
fetch
(
PDO
::
FETCH_NUM
))
{
$abbrev
=
htmlspecialchars
(
$row
[
0
]);
$name
=
htmlspecialchars
(
$row
[
1
]);
printf
(
'<option value="%s">%s</option>'
,
$abbrev
,
$name
);
}
print
(
"</select>"
);
And in Python, like this:
stmt
=
"SELECT abbrev, name FROM states ORDER BY name"
cursor
=
conn
.
cursor
()
cursor
.
execute
(
stmt
)
print
(
'<select name="state">'
)
for
(
abbrev
,
name
)
in
cursor
:
abbrev
=
cgi
.
escape
(
abbrev
,
1
)
name
=
cgi
.
escape
(
name
,
1
)
print
(
'<option value="
%s
">
%s
</option>'
%
(
abbrev
,
name
))
print
(
'</select>'
)
cursor
.
close
()
Radio buttons and scrolling lists can be produced in similar fashion. But rather than
doing so, let's use a different approach and construct a set of functions that generate
form elements, given the proper information. The functions return a string representing
the appropriate kind of form element. Invoke them as follows:
make_radio_group (name, values, labels, default, vertical)
make_popup_menu (name, values, labels, default)
make_scrolling_list (name, values, labels, default, size, multiple)
These functions have several arguments in common:
