checkbox array saved into a varible that can be sent in a email.

[denoteone]

I have check box inputs in an html form that all have the name="content[]" on submit how can I save all of the items checked into a variable that I can echo. so if the boxes below are all check it could echo $content;    would show  name1name2name3

<input type="checkbox" name="content[]" value="name1">Name 1

<input type="checkbox" name="content[]" value="name2">>Name 2

<input type="checkbox" name="content[]" value="name3">>Name 3

[F1Fan]

If you are using the post method:

 

echo implode('', $_POST['content']);