[Email form to multiple recipients / checkboxes]

i still get an error msg. saying " Invalid argument supplied for foreach()"

[Email form to multiple recipients / checkboxes]

I'm trying to make a email form where the sender can select his/her recipients by checking them.

Here is my form code that diplays the recipients and checkboxes:

<input type="checkbox" name="email[]" value="recipient 1" /> Recipient 1
<input type="checkbox" name="email[]" value="recipient 2" /> Recipient 2

And this is the php code:

$recipient[] = "mail1@somewhere.com";
$recipient[] = "mail2@somewhere.com";

$mailto="";
foreach(array_intersect(array_keys($recipient),array_values($_POST['email']))
as $val)
{
$mailto.=$recipient[$val].',';
}
$mailto=trim($mailto,',');

I keep getting these error messages:

Warning: array_values(): The argument should be an array

Warning: array_intersect(): Argument #2 is not an array

Warning: Invalid argument supplied for foreach()

And in addition the script displays a "not a valid email" error message, but this is caused by the array error.

Please help!

[Email form with checkboxes]

I'm trying to make an email form where the addresses are stored in a database. I want to be able to display all the addresses at the top of a form and the user be able to check the people he/she wants to send a message to. I know how to display all the addresses, but how do I code it so that the scipt checks if a person is to receive the msg or not? I've attached the form code so you get sort of an idea of what it would look like.

<form id="form1" name="form1" method="post" action="">
<table width="500" border="0">
<tr>
<td><input type="checkbox" name="checkbox" value="checkbox" />
Person 1 </td>
<td>Email address </td>
</tr>
<tr>
<td> <input type="checkbox" name="checkbox2" value="checkbox" />
Person 2 </td>
<td>Email address </td>
</tr>
<tr>
<td><input type="checkbox" name="checkbox3" value="checkbox" />
Person 3 </td>
<td>Email address </td>
</tr>
<tr>
<td>Subject</td>
<td><input type="text" name="textfield" /></td>
</tr>
<tr>
<td>From</td>
<td><input type="text" name="textfield2" /></td>
</tr>
<tr>
<td>Return Email address </td>
<td><input type="text" name="textfield3" /></td>
</tr>
<tr>
<td>Message</td>
<td><textarea name="textarea" cols="30" rows="10"></textarea></td>
</tr>
<tr>
<td><div align="right">
<input type="reset" name="Submit2" value="Reset" />
</div></td>
<td><input type="submit" name="Submit" value="Submit" /></td>
</tr>
</table>
</form>