PHP loop through checkbox array to show values

Question

How do I loop through a checkbox array so it shows each value?

Original code:

  <form class="form" method="POST" action="index.php?id=22">
<? if (!$_POST['step']) { ?>
<input type="hidden" name="step" value="1" />
        <tr>
      <td width="300" valign="top"><label style="margin-right: 25px;">
          <input style="width: 25px;" type="checkbox" name="CheckboxGroup2" value="Pharmaceuticals" id="member3_pharma" />Pharmaceuticals</label>
        &nbsp;&nbsp;&nbsp;</td>
      <td width="300" valign="top"><label style="margin-right: 25px;">
          <input style="width: 25px;" type="checkbox" name="CheckboxGroup2" value="Medical Devices" id="member3_devices" />
          Medical Devices</label>
        &nbsp;&nbsp;&nbsp;</td>
      <td width="300" valign="top"><label style="margin-right: 25px;">
          <input style="width: 25px;" type="checkbox" name="CheckboxGroup2" value="Legal" id="member3_legal" />
          Legal</label>
        &nbsp;&nbsp;&nbsp;</td>
    </tr>
    <button class="blue medium awesome awesomeforward" style="margin: 10px; float: right;" type="submit" name="submit">Next step</button>
<? } else if ($_POST['step'] == 3) {

foreach($_POST as $name => $value) {
    if ($name <> "step") { echo "<input type=\"hidden\" name=\"$name\" value=\"$value\" />"; }
}

?>
        <tr>
      <td><label for="member4_total">Total no. employees (Welsh Site)</label></td>
      <td>&nbsp;</td>
      <td><input type="text" name="member4_total" id="member4_total" /></td>
    </tr>
    <tr>
      <td><label for="member4_turnover">Turnover (from Welsh site)</label></td>
      <td>&nbsp;</td>
      <td><input type="text" name="member4_turnover" id="member4_turnover" /></td>
    </tr>
    <? } else if ($_POST['step'] == 4) { //do posting and send email here! 

$to = "[email protected]";
$subject = "MediWales member application";

$CheckboxGroup2_field = $_POST['CheckboxGroup2'];

$body = "$CheckboxGroup2_field";


mail($to, $subject, $body);

echo "Thank you for your account application, we will contact you shortly.";

} ?>
  </form>

xkeshav · Accepted Answer · 2011-02-25 14:52:37Z

4

put name="CheckboxGroup2[]"

and get the data in array form

answered Feb 25, 2011 at 14:52

xkeshav

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6 Comments

Rob Over a year ago

I'm not quite sure how to do that. I've got a multi step form that's doing this at the top aswell - <? if (!$_POST['step']) { ?>

Teekin Over a year ago

@Rob: Maybe you're thinking about it too hard because it's really that simple. Rename 'CheckboxGroup2' to 'CheckboxGroup2[]', and that should be it. PHP automatically turns such variables into arrays. - after that you just need to know how to loop through an array. :)

Rob Over a year ago

Which I don't know how to do :/

Rob Over a year ago

Ok, I'm getting somewhere now, it's just saying array in the email so just need to know how to loop through the checkboxes.

Jules Colle Over a year ago

$_POST['CheckboxGroup2'] holds the array. So do this: foreach($_POST['CheckboxGroup2'] as $key=>$value) {echo $key."= ".$value."<br/>";} this will output the values of all the checked checkboxes

|

eykanal · Accepted Answer · 2011-02-25 16:13:16Z

4

In the spirit of @diEcho's post, your form should look like

<input type='checkbox' name='CBgroup1[]' value='1'> One
<input type='checkbox' name='CBgroup1[]' value='2'> Two
<input type='checkbox' name='CBgroup1[]' value='3'> Three
<input type='checkbox' name='CBgroup1[]' value='4'> Four

<input type='checkbox' name='CBgroup2[]' value='1'> One
<input type='checkbox' name='CBgroup2[]' value='2'> Two
<input type='checkbox' name='CBgroup2[]' value='3'> Three
<input type='checkbox' name='CBgroup2[]' value='4'> Four

On the backend, the $_POST['CBgroup1'] field will be an array instead of a single value. You'll want to loop through that array to see which ones are checked.

answered Feb 25, 2011 at 16:13

eykanal

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2 Comments

Rob Over a year ago

Thanks but as you can see from the comments on the other answer, I don't know how to loop through the array to show the results. I kinda need some hand holding on this!

eykanal Over a year ago

@Rob - You want to use foreach($_POST['CBgroup1'] as $key=>$value). Every value which was checked will be in the array, and those that weren't checked won't be present. Play around with it and you'll see how it works.

Rob · Accepted Answer · 2011-03-01 14:05:43Z

2

Solved with:

foreach ($_SESSION['CheckboxGroup1'] as $val) {
$checkbox1results .= $val.",\n";
}

answered Mar 1, 2011 at 14:05

Rob

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1 Comment

RPL Over a year ago

If you want to comma-separate them, you could also use implode(', ', $_SESSION['CheckboxGroup1']). You wouldn't even need to use the foreach().

DharmaTurtle · Accepted Answer · 2011-02-27 01:21:11Z

0

You can use

if(isset($_POST['CBgroup1']))
#to ensure that $_POST[yadda] exists, otherwise you get a happy error
    if(in_array("4",$_POST['CBgroup1']))
    #searches your array for "4", if you like this make sure each value checkbox is unique
         echo "The fourth checkbox is checked.";

I wanted this in reply to eykanal, but I don't think I have enough reputation. (Please tell me if I missed something obvious, this is my first post ever =)

answered Feb 27, 2011 at 1:21

DharmaTurtle

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