How to save checkbox value in PHP

hongmei

Hi,

Please help:

How to get checkbox value from HTML and save to database in PHP?

Thanks

hongmei

siwis

Your basic pre-checked HTML checkbox looks like this:

<input type="checkbox" name="fieldname" id="fieldname" value="value" checked>

When the form gets submitted a variable will be passed to the receiving script with the name fieldname and a value of value.

To realise that variable and its value you need to refer to it like this:
$_POST['fieldname']
OR
$HTTP_POST_VARS['fieldname']

If you were to "echo $HTTP_POST_VARS['fieldname']" you would see the word "value" printed to screen.

What you do with this variable and its value is up to you.

hongmei

Thanks!

But my following code always give me "checkbox is true"
check box is 1 even if the checkbox is not checked at all.

What should I do to get the correct checkbox value?
Do you have an example?

Thanks again for your help!

hongmei

if ($HTTP_POST_VARS['chkProDesc'].checked ==true){
echo "check box is true";
$ProDesc =1;
echo " check box is". $ProDesc;
}
else{
$ProDesc =0;
echo " check box is". $ProDesc;
}

in HTML, I wrote:

<td colspan="2">Program Description Document:
<input type="checkbox" name="chkProDesc" value="0" unchecked>
</td>

siwis

0 actually means FALSE therefore if your checkbox gets checked, you actually pass a value of 0 into your following script. With the checkbox unchecked, the value is NULL.

In your form change to:

<input type="checkbox" name="chkProDesc" value="1">

Then in your script actions change to this;

if ($HTTP_POST_VARS['chkProDesc'] == "1"){ 
echo "check box is true"; 
$ProDesc =1; 
echo " check box is". $ProDesc; 
} else { 
$ProDesc =0; 
echo " check box is". $ProDesc; 
}

hongmei

Hi, Siwis:

Thanks a lot for your help!
The your code worked, but user wants to have checkbox unchecked at beginning. Currently when user opens the page first time, the checkbox is already checked.

What should I do?

hongmei

paul088

remove "checked" within input tag.