email attachment to detect the content_type for each file in directory

[Ernie1]

Hi, everybody!
I have this function from php.net.
I would like to change this function to read 'att' directory and automatically detect the the content_type for each file in this directory.
Any help would be appreciated.

function send_mail($emailaddress, $fromaddress, $emailsubject, $body, $attachments = false)
{
     $eol = "\r\n";
     $mime_boundary = md5(time());
    
     # Common Headers
    $headers = 'From: MyName<' . $fromaddress . '>' . $eol;
     $headers .= 'Reply-To: MyName<' . $fromaddress . '>' . $eol;
     $headers .= 'Return-Path: MyName<' . $fromaddress . '>' . $eol; // these two to set reply address
     $headers .= "Message-ID: <" . time() . " TheSystem@" . $_SERVER['SERVER_NAME'] . ">" . $eol;
     $headers .= "X-Mailer: PHP v" . phpversion() . $eol; // These two to help avoid spam-filters
    
    
     # Boundry for marking the split & Multitype Headers
    $headers .= 'MIME-Version: 1.0' . $eol;
     $headers .= "Content-Type: multipart/related; boundary=\"" . $mime_boundary . "\"" . $eol;
    
     $msg = "";
    
     if ($attachments !== false)
    {
        
         for($i = 0; $i < count($attachments); $i++)
        {
             if (is_file($attachments[$i]["file"]))
                {
                 # File for Attachment
                $file_name = substr($attachments[$i]["file"], (strrpos($attachments[$i]["file"], "/") + 1));
                
                 $handle = fopen($attachments[$i]["file"], 'rb');
                 $f_contents = fread($handle, filesize($attachments[$i]["file"]));
                 $f_contents = chunk_split(base64_encode($f_contents)); //Encode The Data For Transition using base64_encode();
                 fclose($handle);
                
                 # Attachment
                $msg .= "--" . $mime_boundary . $eol;
                 $msg .= "Content-Type: " . $attachments[$i]["content_type"] . "; name=\"" . $file_name . "\"" . $eol;
                 $msg .= "Content-Transfer-Encoding: base64" . $eol;
                 $msg .= "Content-Disposition: attachment; filename=\"" . $file_name . "\"" . $eol . $eol; // !! This line needs TWO end of lines !! IMPORTANT !!
                 $msg .= $f_contents . $eol . $eol;
                
                 }
             }
         }
    
     # Setup for text OR html
    $msg .= "Content-Type: multipart/alternative" . $eol;
    
     # Text Version
    $msg .= "--" . $mime_boundary . $eol;
     $msg .= "Content-Type: text/plain; charset=iso-8859-1" . $eol;
     $msg .= "Content-Transfer-Encoding: 8bit" . $eol;
     $msg .= strip_tags(str_replace("<br>", "\n", $body)) . $eol . $eol;
    
     # HTML Version
    $msg .= "--" . $mime_boundary . $eol;
     $msg .= "Content-Type: text/html; charset=iso-8859-1" . $eol;
     $msg .= "Content-Transfer-Encoding: 8bit" . $eol;
     $msg .= $body . $eol . $eol;
    
     # Finished
    $msg .= "--" . $mime_boundary . "--" . $eol . $eol; // finish with two eol's for better security. see Injection.
    
     # SEND THE EMAIL
    mail($emailaddress, $emailsubject, $msg, $headers);
    echo "mail send";
    }


# To Email Address
$emailaddress = "xxx@xxx.com";

# From Email Address
$fromaddress = "webmaster@xxx.org";

# Message Subject
$emailsubject = "This is a test mail with some attachments";

# Use relative paths to the attachments
$attachments = Array(
    Array("file" => "att/close.gif", "content_type" => "image/gif"),
     Array("file" => "att/capture.jpg", "content_type" => "image/jpg")
    );

# Message Body
$body = "This is a message with <b>" . count($attachments) . "</b> attachments and maybe some <i>HTML</i>!";

send_mail($emailaddress, $fromaddress, $emailsubject, $body, $attachments);