最好的邮件编码解码类
<?php
function build_text_body($body) {
return "\n<pre>".$this->make_link_clickable($this->linesize(htmlspecialchars($body),85))."</pre>\n";
}
function decode_qp($text) {
$text = quoted_printable_decode($text);
/*
$text = str_replace("\r","",$text);
$text = ereg_replace("=\n", "", $text);
$text = str_replace("\n","\r\n",$text);
*/
$text = ereg_replace("=\r", "\r", $text);
return $text;
}
function make_link_clickable($text){
$text = eregi_replace("([[:alnum:]]+)://([^[:space:]]*)([[:alnum:]#?/&=])",
"<a class=\"autolink\" href=\"\\1://\\2\\3\" target=\"_new\">\\1://\\2\\3</a>", $text);
$text = eregi_replace("([0-9a-z]([-_.]?[0-9a-z])*@[0-9a-z]([-.]?[0-9a-z])*\\.[a-z]{2,3})","<a class=\"autolink\" href=\"newmsg.php?mailto=\\1&nameto=\\1\">\\1</a>", $text);
return $text;
}
function process_message($header,$body) {
global $mime_show_html;
$mail_info = $this->get_mail_info($header);
$ctype = $mail_info["content-type"];
$ctenc = $mail_info["content-transfer-encoding"];
if($ctype == "") $ctype = "text/plain";
$type = $ctype;
$ctype = split(";",$ctype);
$types = split("/",$ctype[0]);
$maintype = strtolower($types[0]);
$subtype = strtolower($types[1]);
switch($maintype) {
case "text":
$body = $this->compile_body($body,$ctenc);
switch($subtype) {
case "html":
if(!$mime_show_html)
$body = $this->build_text_body(strip_tags($body));
$msgbody = $body;
break;
default:
$msgbody = $this->build_text_body($body);
break;
}
break;
case "multipart":
switch($subtype) {
case "mixed":
$boundary = $this->get_boundary($type);
$part = $this->split_parts($boundary,$body);
for($i=0;$i<count($part);$i++) {
$thispart = trim($part[$i]);
if($thispart != "") {
$email = $this->fetch_structure($thispart);
$header = $email["header"];
$body = $email["body"];
$headers = $this->decode_header($header);
$ctype = $headers["content-type"];
$Actype = split(";",$headers["content-type"]);
$types = split("/",$Actype[0]); $rctype = strtolower($Actype[0]);
if($rctype == "multipart/alternative")
$msgbody = $this->build_alternative_body($ctype,$body);
elseif($rctype == "text/plain" && strpos($headers["content-disposition"],"name") === false) {
$msgbody = $this->build_text_body($this->compile_body($body,$headers["content-transfer-encoding"]));
} elseif($rctype == "text/html" && strpos($headers["content-disposition"],"name") === false) {
$body = $this->compile_body($body,$headers["content-transfer-encoding"]);
if(!$mime_show_html)
$body = $this->build_text_body(strip_tags($body));
$msgbody = $body;
} elseif($rctype == "multipart/related" && strpos($headers["content-disposition"],"name") === false) {
$msgbody = $this->build_related_body($ctype,$body);
} else {
$thisattach = $this->build_attach($header,$body,$boundary,$i);
}
}
}
break;
case "alternative":
$msgbody = $this->build_alternative_body($ctype[1],$body);
break;
case "related":
$msgbody = $this->build_related_body($type,$body);
break;
default:
$thisattach = $this->build_attach($header,$body,"",0);
}
break;
default:
$thisattach = $this->build_attach($header,$body,"",0);
}
return $msgbody;
}
function build_attach($header,$body,$boundary,$part) {
global $mail,$temporary_directory,$userfolder;
$headers = $this->decode_header($header);
$cdisp = $headers["content-disposition"];
$ctype = $headers["content-type"]; $ctype2 = explode(";",$ctype); $ctype2 = $ctype2[0];
$Atype = split("/",$ctype);
$Acdisp = split(";",$cdisp);
$tenc = $headers["content-transfer-encoding"];
if($temp) $dir_to_save = $userfolder; //"temporary_files/";
if($Atype[0] == "message") {
$divpos = strpos($body,"\n\r");
$attachheader = substr($body,0,$divpos);
$attachheaders = $this->decode_header($attachheader);
$filename = $this->decode_mime_string($attachheaders["subject"]);
if($filename == "")
$filename = uniqid("");
$filename = substr(ereg_replace("[^A-Za-z0-9]","_",$filename),0,20).".eml";
} else {
$fname = $Acdisp[1];
$filename = substr($fname,strpos($fname,"filename=")+9,strlen($fname));
if($filename == "")
$filename = substr($ctype,strpos($ctype,"name=")+5,strlen($ctype));
if(substr($filename,0,1) == "\"" && substr($filename,-1) == "\"")
$filename = substr($filename,1,strlen($filename)-2);
$filename = $this->decode_mime_string($filename);
}
if($Atype[0] != "message")
$body = $this->compile_body($body,$tenc);
$indice = count($this->content["attachments"]);
$this->content["attachments"][$indice]["name"] = $filename;
$this->content["attachments"][$indice]["size"] = strlen($body);
$this->content["attachments"][$indice]["temp"] = $temp;
$this->content["attachments"][$indice]["content-type"] = $ctype2; //$Atype[0];
$this->content["attachments"][$indice]["content-disposition"] = $Acdisp[0];
$this->content["attachments"][$indice]["boundary"] = $boundary;
$this->content["attachments"][$indice]["part"] = $part;
return $this->content["attachments"][$indice];
}
function compile_body($body,$enctype) {
$enctype = explode(" ",$enctype); $enctype = $enctype[0];
if(strtolower($enctype) == "base64")
$body = base64_decode($body);
elseif(strtolower($enctype) == "quoted-printable")
$body = $this->decode_qp($body);
return $body;
}
function download_attach($header,$body,$down=1) {
$headers = $this->decode_header($header);
$cdisp = $headers["content-disposition"];
$ctype = $headers["content-type"];
$type = split(";",$ctype); $type = $type[0];
$Atype = split("/",$ctype);
$Acdisp = split(";",$cdisp);
$tenc = strtolower($headers["content-transfer-encoding"]);
if($Atype[0] == "message") {
$divpos = strpos($body,"\n\r");
$attachheader = substr($body,0,$divpos);
$attachheaders = $this->decode_header($attachheader);
$filename = $this->decode_mime_string($attachheaders["subject"]);
if($filename == "")
$filename = uniqid("");
$filename = substr(ereg_replace("[^A-Za-z0-9]","_",$filename),0,20);
$filename .= ".eml";
} else {
$fname = $Acdisp[1];
$filename = substr($fname,strpos(strtolower($fname),"filename=")+9,strlen($fname));
if($filename == "")
$filename = substr($ctype,strpos(strtolower($ctype),"name=")+5,strlen($ctype));
if(substr($filename,0,1) == "\"" && substr($filename,-1) == "\"")
$filename = substr($filename,1,strlen($filename)-2);
$filename = $this->decode_mime_string($filename);
}
if($Atype[0] != "message")
$body = $this->compile_body($body,$tenc);
$content_type = ($down)?"application/octet-stream":strtolower($type);
$filesize = strlen($body);
header("Content-Type: $content_type; name=\"$filename\"\r\n"
."Content-Length: $filesize\r\n");
$cdisp = ($down)?"attachment":"inline";
header("Content-Disposition: $cdisp; filename=\"$filename\"\r\n");
echo($body);
}
function get_mail_info($header) {
$myarray = Array();
$headers = $this->decode_header($header);
/*
echo("<pre>");
print_r($headers);
echo("</pre>");
*/
$message_id = $headers["message-id"];
if(substr($message_id,0,1) == "<" && substr($message_id,-1) == ">")
$message_id = substr($message_id,1,strlen($message_id)-2);
$myarray["content-type"] = $headers["content-type"];
$myarray["content-transfer-encoding"] = str_replace("GM","-",$headers["content-transfer-encoding"]);
$myarray["message-id"] = $message_id;
$received = $headers["received"];
if($received != "") {
$received = explode(";",$received);
$mydate = $received[1];
} else
$mydate = $headers["date"];
$myarray["date"] = $this->build_mime_date($mydate);
$myarray["subject"] = $this->decode_mime_string($headers["subject"]);
$myarray["from"] = $this->get_names($headers["from"]);
$myarray["to"] = $this->get_names($headers["to"]);
$myarray["cc"] = $this->get_names($headers["cc"]);
$myarray["status"] = $headers["status"];
$myarray["read"] = ($headers["status"] == "N")?0:1;
return $myarray;
}
function build_mime_date($mydate) {
$mydate = explode(",",$mydate);
$mydate = trim($mydate[count($mydate)-1]);
$parts = explode(" ",$mydate);
if(count($parts) < 4) { return time(); }
$day = $parts[0];
switch(strtolower($parts[1])) {
case "jan": $mon = 1; break;
case "feb": $mon = 2; break;
case "mar": $mon = 3; break;
case "apr": $mon = 4; break;
case "may": $mon = 5; break;
case "jun": $mon = 6; break;
case "jul": $mon = 7; break;
case "aug": $mon = 8; break;
case "sep": $mon = 9; break;
case "oct": $mon = 10; break;
case "nov": $mon = 11; break;
case "dec": $mon = 12; break;
}
$year = $parts[2];
$ahours = explode(":",$parts[3]);
$hour = $ahours[0]; $min = $ahours[1]; $sec = $ahours[2];
return mktime ($hour, $min, $sec, $mon, $day, $year);
}
function initialize($email) {
$email = $this->fetch_structure($email);
$body = $email["body"];
$header = $email["header"];
$mail_info = $this->get_mail_info($header);
$this->content["headers"] = $header;
$this->content["date"] = $mail_info["date"];
$this->content["subject"] = $mail_info["subject"];
$this->content["message-id"] = $mail_info["message-id"];
$this->content["from"] = $mail_info["from"];
$this->content["to"] = $mail_info["to"];
$this->content["cc"] = $mail_info["cc"];
$this->content["body"] = $this->process_message($header,$body);
$this->content["read"] = $mail_info["read"];
}
function split_parts($boundary,$body) {
$startpos = strpos($body,"$boundary")+strlen("$boundary")+2;
$lenbody = strpos($body,"\r\n$boundary--") - $startpos;
$body = substr($body,$startpos,$lenbody);
return split($boundary."\r\n",$body);
}
function get_boundary($ctype){
$boundary = trim(substr($ctype,strpos(strtolower($ctype),"boundary=")+9,strlen($ctype)));
$boundary = split(";",$boundary);$boundary = $boundary[0];
if(substr($boundary,0,1) == "\"" && substr($boundary,-1) == "\"")
$boundary = substr($boundary,1,strlen($boundary)-2);
$boundary = "--".$boundary;
return $boundary;
}
function set_as($email,$type=1) {
$status = ($type)?"Y":"N";
$tempmail = $this->fetch_structure($email);
$thisheader = $tempmail["header"];
$mail_info = $this->get_mail_info($thisheader);
$decoded_headers = $this->decode_header($thisheader);
while(list($key,$val) = each($decoded_headers))
if (eregi("status",$key)) {
$newmail .= ucfirst($key).": $status\r\n"; $headerok = 1;
} else $newmail .= ucfirst($key).": ".trim($val)."\r\n";
if(!$headerok) $newmail .= "Status: $status\r\n";
$newmail = trim($newmail)."\r\n\r\n".trim($tempmail["body"]);
return $newmail;
}
}
?>