lets say I have this form
<form name="myform" action="/acms/test/multiselect/blah" action="GET">
<select name="mytextarea[]" multiple="multiple">
<option name="one"> one </option>
<option name="two"> two </option>
<option name="three"> three </option>
</select>
<input type="submit" />
</form>
if i submit this with all the options checked and look into the url, i see
?mytextarea[]=one&mytextarea[]=two&mytextarea[]=three
My question is if there is a way to make the url look like this instead
?mytextarea=one,two,three
without using javascript and retrievable in $_GET?
No. You would have to use JavaScript for this.
Doing this on server side would be much preferable though – you could process the data there, and then do a header redirect to the final result if you need to show the URL to the user.