Build a list in PHP from multiple selected form options

Question

I have a form that a user completes to join a chat room, wasn't ever a problem as we only had it to be able to join a single chat room but now we've provided multiple options like

           <option value="#Chat1">Chat 1</option>
           <option value="#Chat2">Chat 2</option>
           <option value="#Chat3">Chat 3</option>
           <option value="#Chat4">Chat 4</option>

Later on I have

params.autojoin = "<? echo $_POST['channel']; ?>";

How can I change this so that it is every selected channel seperated by a comma i.e. #Chat1,#Chat3?

Thanks

you might need to have name attribute of select tag something like name='chatRoom[]' and then in php you can use implode as implode(',', $_POST['chatRoom']) — Yogesh
– Yogesh, Commented Feb 25, 2014 at 12:39

Yogesh · Accepted Answer · 2014-02-25 13:00:28Z

2

HTML

<select name="chatRoom[]" multiple="multiple">
<option value="#Chat1">Chat 1</option>
<option value="#Chat2">Chat 2</option>
<option value="#Chat3">Chat 3</option>
<option value="#Chat4">Chat 4</option>
</select>

PHP $selectChatRoom = implode(",",$_POST['chatRoom']);

edited Feb 25, 2014 at 13:00

answered Feb 25, 2014 at 12:41

Yogesh

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3 Comments

Reinder Wit Over a year ago

I dont think this is the way to go. If you make the select into a multiple="multiple", it already is an 'array' that's posted (comma separted string, I believe) so you don't need the brackets

barryhunter Over a year ago

Its only an array if the name contains []. Otherwise, $_POST['chatRoom'] will only contain the last value.

Reinder Wit Over a year ago

@barryhunter you are right. but my point is that you need to add multiple="multiple" to the select. You can always make the posted value into an array through server side code...

Digital Chris · Accepted Answer · 2014-02-25 12:53:47Z

0

params.autojoin = "<? echo implode(',',$_POST['channel']); ?>";

Edit:

As others have commented, my solution assumes you have correctly set up your select like:

<select multiple name="channel[]">

You might already have this; no way to tell if you don't provide the code ;)

edited Feb 25, 2014 at 12:53

answered Feb 25, 2014 at 12:39

Digital Chris

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Comments

Andres Orav · Accepted Answer · 2014-02-25 14:50:27Z

0

It should work:

set name of the select as name="channel[]"

params.autojoin = "<?php echo isset($_POST['channel']) && is_array($_POST['channel']) ? implode(',', $_POST['channel']) : ''; ?>";

answered Feb 25, 2014 at 14:50

Andres Orav

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