How do get the state of checkboxes in php?

[Lorenzo Thurman]

I have a group of checkboxes drawn by javascript and I need to get each
of their states into PHP after submitting the page. I should think I
could get them in a POST, but that fails. Anyone have any ideas?
TIA

[Jerry Stuckle]

Lorenzo Thurman wrote:

I have a group of checkboxes drawn by javascript and I need to get each
of their states into PHP after submitting the page. I should think I
could get them in a POST, but that fails. Anyone have any ideas?
TIA

It's how HTML works. Only checked boxes are sent in the GET or POST
request. Unchecked ones are not.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attglobal.net
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[Kelsey Sigurdur]

On Fri, 07 Sep 2007 13:06:34 -0500, Lorenzo Thurman wrote:

I have a group of checkboxes drawn by javascript and I need to get each
of their states into PHP after submitting the page. I should think I
could get them in a POST, but that fails. Anyone have any ideas?
TIA

Use an additional hidden input, with the same name as the checkbox and a
value of 0. In almost all cases you'll want the hidden input to appear in
the source before the actual checkbox.

When the form is submitted, if the checkbox has been checked, it's value
will override the hidden input of the same name. If it hasn't been checked
the hidden input (with its value of 0) will be in the $_POST array.

AFAIK this is the only way to do it as unchecked checkboxes are not passed
to POST at all.

--
Kelsey Sigurdur

[Tom.Slayton]

On Sep 7, 5:02 pm, Kelsey Sigurdur <[e-mail]:

On Fri, 07 Sep 2007 13:06:34 -0500, Lorenzo Thurman wrote:

I have a group of checkboxes drawn by javascript and I need to get each
of their states into PHP after submitting the page. I should think I
could get them in a POST, but that fails. Anyone have any ideas?
TIA

Use an additional hidden input, with the same name as the checkbox and a
value of 0. In almost all cases you'll want the hidden input to appear in
the source before the actual checkbox.

When the form is submitted, if the checkbox has been checked, it's value
will override the hidden input of the same name. If it hasn't been checked
the hidden input (with its value of 0) will be in the $_POST array.

AFAIK this is the only way to do it as unchecked checkboxes are not passed
to POST at all.

--
Kelsey Sigurdur

You could just test for the value in the post buffer and set a
variable:
$lnChecked = ($_POST['CheckboxName'] == "on") ? 1 : 0 ;

Best,

Tom.

[The Natural Philosopher]

Kelsey Sigurdur wrote:

On Fri, 07 Sep 2007 13:06:34 -0500, Lorenzo Thurman wrote:

>I have a group of checkboxes drawn by javascript and I need to get each
of their states into PHP after submitting the page. I should think I
could get them in a POST, but that fails. Anyone have any ideas?
TIA

Use an additional hidden input, with the same name as the checkbox and a
value of 0. In almost all cases you'll want the hidden input to appear in
the source before the actual checkbox.

When the form is submitted, if the checkbox has been checked, it's value
will override the hidden input of the same name. If it hasn't been checked
the hidden input (with its value of 0) will be in the $_POST array.

AFAIK this is the only way to do it as unchecked checkboxes are not passed
to POST at all.

This is the generic way to do javascript/php dialogue.

EITHER set your submit button to invoke javascript and cahin to the next
page using get variables.. i.e. replace.window("myurl?myvar=Myvalue");

OR set up a POST form with id hidden variables, do a
getElementbyId('myvar').value="Myvalue";
and then submit()....

Syntax NOT guaranteed ;-)

[macca]

The HTML form:

<p>Please select every sport that you play.</p>

Soccer: <input type="checkbox" name="sports[]" value="soccer" /><br /

>

Football: <input type="checkbox" name="sports[]" value="football" /

><br />

Baseball: <input type="checkbox" name="sports[]" value="baseball" /

><br />

Basketball: <input type="checkbox" name="sports[]"
value="basketball" />

---------------------------------------------------------------------------------------

The php script:
$sports = $_POST['sports']; // is an array holding all the checked
boxes

foreach ($sports as $checked_sport){

echo $checked_sport."<br />"; // Output the checked boxes to the
output device.

}

[larry]

Keep in mind if no boxes are checked you don't get the value passed
back. Following are a couple functions I put together to retain my
sanity in checklists and other array input use it like:

$arrayname = postarrayfix('postarrayname');

It strips out any potentially bad HTML and slashes if magic quotes are
on.
/*$_POST Fixer, if the following lists are empty, the POSTs return
nulls, which is bad, as the code needs arrays (even empty) to display,
this fixes it.*/

function postArrayFix($postname){
if( empty($_POST[$postname]) ){
$value = array();
} else {
$value = cleanArray($_POST[$postname]);
}
return $value;
}

/*This one is for if you are reading in arrays from $_POST data, it
will walk deep into the array and clean it up.
*/

function cleanArray($value)
{
if(get_magic_quotes_gpc()) {
$value = is_array($value) ?
array_map('cleanArray', $value) :
stripslashes(strip_tags($value));
} else {
$value = is_array($value) ?
array_map('cleanArray', $value) :
strip_tags($value);
}
return $value;
}

[Jerry Stuckle]

David Gillen wrote:

Jerry Stuckle said:

>Lorenzo Thurman wrote:

>>I have a group of checkboxes drawn by javascript and I need to get each
of their states into PHP after submitting the page. I should think I
could get them in a POST, but that fails. Anyone have any ideas?
TIA

It's how HTML works. Only checked boxes are sent in the GET or POST
request. Unchecked ones are not.

So check isset($_POST['myCheckBox']).

D.

Yep, that will work just fine.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attglobal.net
==================