PHP Form Handling with Multiple Checkboxes

Question

I have a page that takes questions from the database and auto generates a survey page. This data is then sent to the same form using POST. The code then breaks down the question into Checkbox/Radio button type, and stores the answer appropriately.

This works perfectly for my radio button type question, but for the checkbox types, only the last selected option is present in the $_POST data.

This is the generated HTML of a sample checkbox question -

1 . Question One 
  <br/>
<fieldset>

        <label for="check[0]">
  <input type="checkbox" class="checkbox" id="check[0]" name="check[0]" value="Opt One" required="required" minlength="2">Opt One 
  </label>

   <br />
      <label for="check[1]"><input type="checkbox" class="checkbox" id="check[1]" name="check[0]" value="Opt Two">Opt Two 
  </label>

   <br />
      <label for="check[2]"><input type="checkbox" class="checkbox" id="check[2]" name="check[0]" value="Opt Three">Opt Three 
  </label>

   <br />
      <label for="check[3]"><input type="checkbox" class="checkbox" id="check[3]" name="check[0]" value="Opt Four">Opt Four 
  </label>

   <br />
    <label for="0" class="error" style="display:none"> Please select at least one option. </label>
  <br/>
</fieldset>

For example if this was the only question and I select "Opt One" and "Opt Two", then print_r($_POST) shows the following -

Array ( [check] => Array ( [0] => Opt Two )

Which basically means that Question ID 0's selected option is Opt Two (Opt One has been missed out here).

I can show more code if needed, but as of now I feel this has something to do with my HTML Syntax.

give different name for check boxs and try...

user1844933
– user1844933

2014-01-18 13:14:10 +00:00
Commented Jan 18, 2014 at 13:14 — user1844933
– user1844933, Commented Jan 18, 2014 at 13:14

Simone Nigro · Accepted Answer · 2014-01-18 13:15:40Z

3

<input type="checkbox" name="check[]" value="Opt One" checked>
<input type="checkbox" name="check[]" value="Opt Two" checked>
<input type="checkbox" name="check[]" value="Opt Three" checked>

<?php print_r( $_POST["check"] ); ?>

Output:

Array ( [0] => Opt One, [1] => Opt Two, [2] => Opt Three )

answered Jan 18, 2014 at 13:15

Simone Nigro

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1 Comment

Sainath Krishnan Over a year ago

Will this also work if I use name="check0[]" and name="check1[]" ? Update : Ok so it works, but is the way I named it a bad programming practice or is that ok?

cornelb · Accepted Answer · 2014-01-18 13:15:16Z

0

You can use name=check[] and then see what you get in $_POST

answered Jan 18, 2014 at 13:15

cornelb

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2 Comments

Sainath Krishnan Over a year ago

This would work if I had one question only right? Won't it clash if I had a second question?

cornelb Over a year ago

It will make an array with the options that are selected

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