How to send data from checkboxes(again)?

Anon

I would like to know how to send data from checkboxes. Yestarday I received a answer from Rob but I could't menege.

Sorry Rob, I couldn't send data from checkboxes. I made this loop (how you said)
<?
if(is_array($ALFA)){
$type_id=current($ALFA);
}
while(next($ALFA)){
$type_id=current($ALFA);
}

	echo "$type_id,$ALFA"
?>

And my HTML was:
<FORM ACTION="http://btsz.dir.bg/test.php3" METHOD=POST>
<INPUT TYPE=CHECKBOX NAME=ALFA[$i]

VALUE=$type_id>Parvi<br>
<INPUT TYPE=CHECKBOX NAME=ALFA[$i]
VALUE=$type_id>Vtori<br>
<INPUT TYPE=CHECKBOX NAME=ALFA[$i]
VALUE=$type_id>Treti<br>
<input type=submit name=submit>
</FORM>
But the only result was Arrey. Well I know that this is arrey but what are the variables?
I know that I am boring you too much but please Can you tell me at least where is my mistake?
vlad

Anon

<head>
<title>Test</title>
</head>
<body bgcolor="#FFFFFF" text="#000000">
<form action="somescript.php" method="post">
<input type="checkbox" name="checky1" value="1">First Option<br>
<input type="checkbox" name="checky2" value="1">Second Option<br>
<input type="submit" name="send_button" value="ok">
</form>
</body>

at somescript.php :

<?php
if ($checky1) {
echo('First Option was checked.<br>');
}
if ($checky2) {
echo('Second Option was checked.');
}
?>

i am sure it's not what you expect, but you cant use checkboxes associated with arrays whitouth get problems... how you ll know what checkbox wasn't checked? it 'll return no 'false' at no checked positions..
anyway, if you want to use arrays as name of some html tag, use only [], without an index.. php ll do it for you:
<input type='text' name='an_array[]' value='a'><br>
<input type='text' name='an_array[]' value='b'>
in php, you ll get:
an_array has {'a', 'b'}
an_array[0] has 'a'
an_array[1] has 'b'

Anon

I'm not quite sure what you're trying to accomplish here, but maybe this will help:

To pass an array, whose contents are based on what checkboxes a user has selected, to a PHP script you could do it like so:

<input type='checkbox' name='array_name[]' value='choice 1'> choice 1
<br><input type='checkbox' name='array_name[]' value='choice 2'> choice 2
<br>

When the form is submitted, then the scalar array $array_name will be available for whatever you want to do. (e.g. if the user checked both boxes then $array_name[0] == "choice 1" and $array_name[1] == "choice 2")

Did that help at all?

Anon

After toying around with this for awhile I came up with this:

In the HTML form use an array (here, test[])for the value for each of a group of checkboxes:
<INPUT TYPE="checkbox" NAME="test[]" VALUE="1">1
<INPUT TYPE="checkbox" NAME="test[]" VALUE="2">2

In the processing PHP file, check all the HTTP Post variables and find out for each, if it's an array; If so, it's a checkbox - since I use the array 'test[]' in my form above.

For each element of the array, see if there's a value - once we find one then we know the user has checked at least one box and set $fnd_error to 0 (zero).

In my code, I handle errors by adding the field to the errors[] array, if there's a non-empty value, we add it to the values[] array:

while (list ($key, $val) = each ($HTTP_POST_VARS)) {

Handle arrays (checkboxes)

if (is_array($val)) {
$fnd_error = 1;
while (list ($array_k, $array_v) = each ($val)) {
if ($array_v != "") {
$fnd_error = 0;
}
}
if ($fnd_error == 1) {
$errors[$a] = $key;
$a = $a + 1;
} else {
$values[$key] = $val;
$b = $b + 1;
}

Handle non-arrays (everything else)

} else {

non-array error-checking code here

}

Anyhow, this might be more than you're looking for, but I felt a full example will help you deal with the next natural question I had: how to deal with verifying checkbox variables!!

Regards,
Kevin

Anon

Thank you very much guys now I understand much better my problems

vlad

Anon

ok, thats nice.. but is this hard work worthy?
i think it's a valid option only if you need to create a form with 'n' checkboxes.. at normal conditions, we know how many checks we need.
its necessary to do many interactions, to filter that informations..
to use differente variables is easer, faster to create and maybe faster to execute..

Anon

It's not really hard work. Actually quite the opposite. Its a very valid solution in many cases. In the example that you used previously, it would certainly be easier than writing out a long list of:

if ($checky1) { 
                 echo('First Option was checked.<br>'); 
         } 
          if ($checky2) { 
                 echo('Second Option was checked.');
}

Instead you could just do:

foreach ($array_name as $i)
{
	echo "$i was checked";
}

Your list of choices could grow and grow and grow, and you wouldn't have to add additional if statements.

Anon

This is very clever.. I never thought of using a SINGLE array.

Great advice and I'll definitely be using it!