PHP表单：基于下拉选择的多个收件人

Question

I need a form to send to multiple different receipients based off the user dropdown selection. Here is what I've read up on so far... I can get it to say success but I dont recieve the email. Please help!!

Html:

<select id="sendto" class="css-select" name="sendto">
<option id="sales" value="gmail" name="sendto">Gmail</option>
<option id="support" value="yahoo" name="sendto">yahoo</option>
</select>

PHP:

<?php

$i = $_POST["sendto"];
switch ($i) {
case "gmail":
    $sendto = "[e-mail]";
    break;
case "recpro":
    $sendto = "[e-mail]";
    break;
default:
    $sendto = "[e-mail]"; //opional
    break;
} 

function sanitize( $s ){
$injections = array('/(
+)/i',
'/(+)/i',
'/(\t+)/i',
'/(%0A+)/i',
'/(%0D+)/i',
'/(%08+)/i',
'/(%09+)/i'
);
$s = preg_replace( $injections, '', $s );

return $s;
}  
//catch the posted data
$first_name = sanitize( $_POST['first_name'] );
$last_name = sanitize( $_POST['last_name'] );
$email = sanitize( $_POST['email'] );
$telephone = sanitize( $_POST['telelphone'] );

$body = $telephone."

";
$body.= $first_name."<$email>";
$headers = "From: $last_name<$email>";

if(mail($send_to, $subject, $body, $headers)):
echo "success";
else:
echo "error";
endif;
?>

I need it to be header injection safe.

Answer 1

I just changed

$i = $_POST["sendto"]; switch ($i) { case "gmail": $sendto = "[e-mail]"; break; case "recpro": $sendto = "[e-mail]"; break; default: $sendto = "[e-mail]"; //opional break; }

to this

$i = $_POST["sendto"]; if ($i == "gmail"){ $sendto = "[e-mail]"; } elseif ($i == "yahoo") { $sendto = "[e-mail]"; } else { $sendto = "[e-mail]"; }

and mail section to this:

`

$headers = "From: " . strip_tags($_POST['your-email']) . "
";
$headers .= "Reply-To: ". strip_tags($_POST['your-email']) . "
";
$headers .= "MIME-Version: 1.0
";
$headers .= "Content-Type: text/html; charset=ISO-8859-1
";

if(@mail($sendto, $subject, $mail_body, $headers)):
echo "success";
else:
echo "error";
endif;

`