Checkbox question, testing for checked

[dwest]

This is rudimentary I know...

I have a checkbox with name="foo"

On posting the form, what is the syntax for testing if foo is checked?

If ($_POST['foo']...what goes here?)
  {
      do stuff
  }

Thanks much!

[kenrbnsn]

The values for checkbox are only returned when the checkbox is checked, you can do something like this:
[code]<?php
if (isset($_POST['foo']))
{
//
//  do processing
//
}
?>[/code]

Ken

[dwest]

jeez! no wonder I couldn't figure it out.
Does this return checked or not checked or what??? :D

Thanks!

[boo_lolly]

this is untested, but you could also do this:
[code]
<?php
if(isset($_POST['checkboxarray'])){
$true  = 0;
$false = 0;
foreach($_POST['checkboxarray'] as $key => $val){
if($val == true){
$true++;
}else{
$false++;
}
}
echo $true .' checkboxes were checked<br />\n';
echo $false .' checkboxes were NOT checked<br />\n';
}

echo '<form method="post" action="'. $_SERVER['php_self'] .'">';

for($i = 0; $i <= $num_of_checkboxes; $i++){
echo '<input type="checkbox" name="'. $checkboxarray[$i] .'">';
}

echo '</form>';
?>
[/code]

[dwest]

Thanks much!

[kenrbnsn]

The value is only set when the checkbox is checked. If is is not checked, the isset() will return "false". If it is set, the value of the checkbox will be in $_POST['foo']

Ken

[boo_lolly]

i just modified my code, take a look at it again. it's a little more efficient i think.

[dwest]

Many thanks to both of you for clarifying this for me!  It's amazing how dang simple the solutions to some of my stumbles are.  Makes one feel pretty dumb sometimes  ::)
Live and learn...

[boo_lolly]

[quote author=dwest link=topic=124010.msg513320#msg513320 date=1169746965]
Many thanks to both of you for clarifying this for me!  It's amazing how dang simple the solutions to some of my stumbles are.  Makes one feel pretty dumb sometimes  ::)
Live and learn...
[/quote]
don't sweat it man. we've all asked our fair share of questions around here.
just remember: there are no dumb questions. just dumb people =P.