Sending email to multiple recipients

Question

I’m using sendmail, the problem and the following. Use checkbox to mark recipients. How do I make it so that when I check the checkbox it fills a variable with each recipient, the comma and the next recipient?

input type="checkbox" name="todos" class="todos" onclick="marcardesmarcar()" /> Todos<br/>
<input type="checkbox" class="marcar" name="email1"  value="[e-mail]" /> email1 ([e-mail])<br/>
<input type="checkbox" class="marcar" name="email2"  value="[e-mail]" /> email2 ([e-mail])<br/>
<input type="checkbox" class="marcar" name="email3"  value="[e-mail]" /> email3 ([e-mail])<br>

Variable you will receive in php:

$email = $_POST["email"];

After the validation has been done and filled in the body. Send:

mail($email,$assunto,$mensagem, $headers, "-r".$email_from);

Answer 1

Using the mail function() from PHP you can send to multiple recipients using the first parameter in this way:

mail('[e-mail], [e-mail], ...', ...);

Just split the emails inside the first parameter string using a comma(,).

Answer 2

You can solve your problem like this:

        var inputs = $('input[name="email[]"]');
        inputs.on('change', function () {
            var str = [];
            var control = 0;
            inputs.each(function () {
                if (this.checked) {
                    str.push(this.value);
                  control++;
                }
            });
            $('input[name="emails"]').val(str.join(', '));
        });

#out{width:600px;}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input type="checkbox" name="email[]" value="[e-mail]1">[e-mail]1<br>
    <input type="checkbox" name="email[]" value="[e-mail]2">[e-mail]2<br>
    <input type="checkbox" name="email[]" value="[e-mail]3">[e-mail]3
    <br>
    <input type="text" name="emails" value="" id="out">