Passing Arrays with Forms problem

[Anon]

In an HTML file I have the following.

<INPUT TYPE="CHECKBOX" NAME="skillvar[1]" VALUE="1">
<INPUT TYPE="CHECKBOX" NAME="skillvar[1]" VALUE = "2">

and so on.

So, I go to click on one of the checkboxes, go to the next page. then do this:

$c = count($skillvar);
print "$c";

It prints 0, not 1. Why?

Also, If I have checkboxes for skillvar[2] and lets say skillvar[4], the count will return 2. (Its always returning (what i think the actual count is - 1).)

So, What am I not seeing in this picture?

Thanks,
Andrew Brink

[Anon]

If you have this

<input type=checkbox name=sumvar value=1>

and you submit it, without checking the box, no variable will be passed.

There's two ways to deal with checkboxes:
1) Give each checkbox item a unique name (usually sub-elements in a multidimensional array)
2) Have PHP assign unique names in a multidimensional array.

I prefer the former, when all the values will be unique.

TYPE 1 EX:

<INPUT TYPE=CHECKBOX NAME=sumvar[1] VALUE=1>
<INPUT TYPE=CHECKBOX NAME=sumvar[2] VALUE=2>

Use array_keys and a loop to make sure you get all the values passed, as in

ex:

<?
$keys=array_keys($sumvar);
for ($i=0, $i<sizeof($keys); $i++)
{
echo $sumvar[$keys[$i]];
}
?>

TYPE 2 EX:

<INPUT TYPE=CHECKBOX NAME=sumvar[] VALUE=1>
<INPUT TYPE=CHECKBOX NAME=sumvar[] VALUE=2>
<INPUT TYPE=CHECKBOX NAME=sumvar[] VALUE=3>

Will automatically generate an array
sumvar[0].. sumvar[1], etc. starting from the first one pushed on down thru the checkboxes that were checked.

Go ahead and play with this, eh?

[Anon]

Yeah. I understand all of that fine..

I have 3 groups of checkboxes with the same name.

Names are var[1] var[3] and var[5].

I check one of the boxes in each of the group.

So there is a value in key 1, 3, and 5 of var[].
Correct? Correct.

Now. Wouldn't you expect a count($var) to return
3? I would. Im not sure why its returning one less.

[Anon]

Im an Idiot.

Im Horribly Sorry. I've been saying checkboxes, when I really mean radio.

All the INPUT's are RADIO, not CHECKBOX.

[Anon]

Got some sample code, play with it. Try to understand it! Set it up on a server someplace and point a browser to it, and do the "tweaky-tweaky" until it makes sense.

If you have further questions, feel free, but please include some source!

All of the following should be put into a SINGLE FILE -Ben:

##--------- file t.php
<FORM METHOD=POST>
a<INPUT TYPE=RADIO NAME=var[1] VALUE="a"><BR>
A<INPUT TYPE=RADIO NAME=var[1] VALUE="A"><BR>
b<INPUT TYPE=RADIO NAME=var[3] VALUE="b"><BR>
B<INPUT TYPE=RADIO NAME=var[3] VALUE="B"><BR>
c<INPUT TYPE=RADIO NAME=var[5] VALUE="c"><BR>
C<INPUT TYPE=RADIO NAME=var[5] VALUE="C"><BR>
<INPUT TYPE=SUBMIT>
</FORM>
<hr>

<?

echo "Size of \$var is: ".count($var);
if (is_array($var))
$keys=array_keys($var);
for ($i=0; $i<sizeof($var); $i++)
{
echo "<BR>Var[".$keys[$i]."]= ".$var[$keys[$i]]."<BR>\n";
}

?>