Php: multiple checkboxes

Question

I have the following checkbox created by a loop:

<input type='checkbox' value=0 name='<?php echo $question_id; ?>' />

Each checkbox will have a different ID, and when the user checks several checkboxes, I would like to gather all the id's and insert it into a table that relates an 'event' table with a 'questions' table.

However I am not getting the ids...I know I am supposed to use an array, but is that in the name attribute or the values attribute? Also, how do I pass on the IDs...does that go into the values field?

You can use the implode function implode

Ryan
– Ryan

2011-07-19 17:46:48 +00:00
Commented Jul 19, 2011 at 17:46 — Ryan
– Ryan, Commented Jul 19, 2011 at 17:46

Wrikken · Accepted Answer · 2011-07-19 17:47:33Z

3

In HTML:

<input type='checkbox' value=1 name='checkboxname[<?php echo $question_id; ?>]' />

In PHP:

$set_checkboxes = array_keys($_POST['checkboxname']);

Or, alternatively:

In HTML:

<input type='checkbox' value="<?php echo $question_id; ?>" name='checkboxname[]' />

In PHP:

$set_checkboxes = $_POST['checkboxname'];

answered Jul 19, 2011 at 17:47

Wrikken

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Comments

sdot257 · Accepted Answer · 2011-07-19 17:46:38Z

1

I believe you need something like ..

<input type='checkbox' value=<SOME UNIQUE VALUE> name='field_name[]' />

You'll loop through the field_name which happens to be an array.

answered Jul 19, 2011 at 17:46

sdot257

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2 Comments

redconservatory Over a year ago

That's great...does the value='have to be in quotes' or only if it's a string? I am passing a number/id...

sdot257 Over a year ago

I use quotes (sorry i missed it).

brenjt · Accepted Answer · 2011-07-19 17:48:20Z

0

Try changing your input to this.

<input type='checkbox' value='<?php echo $question_id; ?>' name='questions[]' />

Now when you get the post with php it will return an array with all the question ids

$questionIds = $_POST['questions'];

answered Jul 19, 2011 at 17:48

brenjt

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Comments

Jules · Accepted Answer · 2011-07-19 17:48:28Z

0

Your html:

<form method="post" action="">
<input type="checkbox" id="things[]" value="red"> Cat<br>
<input type="checkbox" id="things[]" value="blue"> Mouse<br>
<input type="checkbox" id="things[]" value="green"> Car<br>
<input type="checkbox" id="things[]" value="yellow"> DaniWeb
</form>

Your PHP:

<?php
$things = serialize($_POST['things']);

$query = "INSERT INTO table(things) values($things)";
mysql_query($query) or die(mysql_error());
?>

answered Jul 19, 2011 at 17:48

Jules

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