Send message with Php

<?php

function sendmsg($to, $subject, $text, $from, $file, $type) {
 $content = fread(fopen($file,"r"),filesize($file));
 $content = chunk_split(base64_encode($content));
 $uid = strtoupper(md5(uniqid(time())));
 $name = basename($file);

 $header = "From: $from\nReply-To: $from\n";
 $header .= "MIME-Version: 1.0\n";
 $header .= "Content-Type: multipart/mixed; boundary=$uid\n";

 $header .= "--$uid\n";
 $header .= "Content-Type: text/plain\n";
 $header .= "Content-Transfer-Encoding: 8bit\n\n";
 $header .= "$text\n";

 $header .= "--$uid\n";
 $header .= "Content-Type: $type; name=\"$name\"\n";

 $header .= "Content-Transfer-Encoding: base64\n";
 $header .= "Content-Disposition: attachment; filename=\"$name\"\n\n";
 $header .= "$content\n";

 $header .= "--$uid--";

 mail($to, $subject, "", $header);

 return true;
}

?>