PHP教程之最好的邮件编码解码类
没有人会喜欢和见异思迁的人交朋友，因为这种人太不安分，太不可靠，因此，你必须要强迫自己完成自己的目标，哪怕可能会很难受，也得坚持，毅力就是这么锻炼出来的。编码 <?class mime_decode {
var $content = Array();
function mime_encode_headers($string) {
if($string == "") return;
if(!eregi("^([[:print:]]*)$",$string))
$string = "=?ISO-8859-1?Q?".str_replace("+","_",str_replace("%","=",urlencode($string)))."?=";
return $string;
}
function decode_mime_string($string) {
if(($pos = strpos($string,"=?")) === false) return $string;
while(!($pos === false)) {
$newresult .= substr($string,0,$pos);
$string = substr($string,$pos+2,strlen($string));
$intpos = strpos($string,"?");
$charset = substr($string,0,$intpos);
$enctype = strtolower(substr($string,$intpos+1,1));
$string = substr($string,$intpos+3,strlen($string));
$endpos = strpos($string,"?=");
$mystring = substr($string,0,$endpos);
$string = substr($string,$endpos+2,strlen($string));
if($enctype == "q") {
$mystring = str_replace("_"," ",$mystring);
$mystring = $this->decode_qp($mystring);
} else if ($enctype == "b")
$mystring = base64_decode($mystring);
$newresult .= $mystring;
$pos = strpos($string,"=?");
}
return $newresult.$string;
}
function decode_header($header) {
$headers = explode("\r\n",$header);
$decodedheaders = Array();
for($i=0;$i<count($headers);$i++) {
$thisheader = $headers[$i];
if(strpos($thisheader,": ") === false) {
$decodedheaders[$lasthead] .= " $thisheader";
} else {
$dbpoint = strpos($thisheader,": ");
$headname = strtolower(substr($thisheader,0,$dbpoint));
$headvalue = trim(substr($thisheader,$dbpoint+1));
if($decodedheaders[$headname] != "") $decodedheaders[$headname] .= "; $headvalue";
else $decodedheaders[$headname] = $headvalue;
$lasthead = $headname;
}
}
return $decodedheaders;
}
function fetch_structure($email) {
$ARemail = Array();
$separador = "\r\n\r\n";
$header = trim(substr($email,0,strpos($email,$separador)));
$bodypos = strlen($header)+strlen($separador);
$body = substr($email,$bodypos,strlen($email)-$bodypos);
$ARemail["header"] = $header; $ARemail["body"] = $body;
return $ARemail;
}
function get_names($strmail) {
$ARfrom = Array();
$strmail = stripslashes(ereg_replace("\t","",ereg_replace("\n","",ereg_replace("\r","",$strmail))));
if(trim($strmail) == "") return $ARfrom;
$armail = Array();
$counter = 0;$inthechar = 0;
$chartosplit = ",;"; $protectchar = "\""; $temp = "";
$lt = "<"; $gt = ">";
$closed = 1;
for($i=0;$i<strlen($strmail);$i++) {
$thischar = $strmail[$i];
if($thischar == $lt && $closed) $closed = 0;
if($thischar == $gt && !$closed) $closed = 1;
if($thischar == $protectchar) $inthechar = ($inthechar)?0:1;
if(!(strpos($chartosplit,$thischar) === false) && !$inthechar && $closed) {
$armail[] = $temp; $temp = "";
} else
$temp .= $thischar;
}
if(trim($temp) != "")
$armail[] = trim($temp);
for($i=0;$i<count($armail);$i++) {
$thisPart = trim(eregi_replace("^\"(.*)\"$", "\\1", trim($armail[$i])));
if($thisPart != "") {
if (eregi("(.*)<(.*)>", $thisPart, $regs)) {
$email = trim($regs);
$name = trim($regs);
} else {
if (eregi("([-a-z0-9_$+.]+@[-a-z0-9_.]+[-a-z0-9_]+)((.*))", $thisPart, $regs)) {
$email = $regs;
$name = $regs;
} else
$email = $thisPart;
}
$email = eregi_replace("^\<(.*)\>$", "\\1", $email);
$name = eregi_replace("^\"(.*)\"$", "\\1", trim($name));
$name = eregi_replace("^\((.*)\)$", "\\1", $name);
if ($name == "") $name = $email;
if ($email == "") $email = $name;
$ARfrom[$i]["name"] = $this->decode_mime_string($name);
$ARfrom[$i]["mail"] = $email;
unset($name);unset($email);
}
}
return $ARfrom;
}
function build_alternative_body($ctype,$body) {
global $mime_show_html;
$boundary = $this->get_boundary($ctype);
$part = $this->split_parts($boundary,$body);
$thispart = ($mime_show_html)?$part:$part;
$email = $this->fetch_structure($thispart);
$header = $email["header"];
$body = $email["body"];
$headers = $this->decode_header($header);
$body = $this->compile_body($body,$headers["content-transfer-encoding"]);
return $body;
}
function build_related_body($ctype,$body) {
global $mime_show_html,$sid,$lid,$ix,$folder;
$Rtype = trim(substr($ctype,strpos($ctype,"type=")+5,strlen($ctype)));
if(strpos($Rtype,";") != 0)
$Rtype = substr($Rtype,0,strpos($Rtype,";"));
if(substr($Rtype,0,1) == "\"" && substr($Rtype,-1) == "\"")
$Rtype = substr($Rtype,1,strlen($Rtype)-2);
$boundary = $this->get_boundary($ctype);
$part = $this->split_parts($boundary,$body);
for($i=0;$i<count($part);$i++) {
$email = $this->fetch_structure($part[$i]);
$header = $email["header"];
$body = $email["body"];
$headers = $this->decode_header($header);
$ctype = $headers["content-type"];
$cid = $headers["content-id"];
$Actype = split(";",$headers["content-type"]);
$types = split("/",$Actype); $rctype = strtolower($Actype);
if($rctype == "multipart/alternative")
$msgbody = $this->build_alternative_body($ctype,$body);
elseif($rctype == "text/plain" && strpos($headers["content-disposition"],"name") === false) {
$body = $this->compile_body($body,$headers["content-transfer-encoding"]);
$msgbody = $this->build_text_body($body);
} 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;
} else {
$thisattach = $this->build_attach($header,$body,$boundary,$i);
if($cid != "") {
if(substr($cid,0,1) == "<" && substr($cid,-1) == ">")
$cid = substr($cid,1,strlen($cid)-2);
$cid = "cid:$cid";
$thisfile = "download.php?sid=$sid&lid=$lid&folder=".urlencode($folder)."&ix=".$ix."&bound=".base64_encode($thisattach["boundary"])."&part=".$thisattach["part"]."&filename=".urlencode($thisattach["name"]);
$msgbody = str_replace($cid,$thisfile,$msgbody);
}
}
}
return $msgbody;
}
function linesize($message="", $length=70) {
$line = explode("\r\n",$message);
unset($message);
for ($i=0 ;$i < count($line); $i++) {
$line_part = explode(" ",trim($line[$i]));
unset($buf);
for ($e = 0; $e<count($line_part); $e++) {
$buf_o = $buf;
if ($e == 0) $buf .= $line_part[$e];
else $buf .= " ".$line_part[$e];
if (strlen($buf) > $length and $buf_o != "") {
$message .= "$buf_o\r\n";
$buf = $line_part[$e];
}
}
$message .= "$buf\r\n";
}
return($message);
}
function build_text_body($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("(([-_.]?)*@([-.]?)*\\.{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);
$maintype = strtolower($types);
$subtype = strtolower($types);
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); $rctype = strtolower($Actype);
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,$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;
$Atype = split("/",$ctype);
$Acdisp = split(";",$cdisp);
$tenc = $headers["content-transfer-encoding"];
if($temp) $dir_to_save = $userfolder; //"temporary_files/";
if($Atype == "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;
$filename = substr($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 != "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;
$this->content["attachments"][$indice]["content-disposition"] = $Acdisp;
$this->content["attachments"][$indice]["boundary"] = $boundary;
$this->content["attachments"][$indice]["part"] = $part;
return $this->content["attachments"][$indice];
}
function compile_body($body,$enctype) {
$enctype = explode(" ",$enctype); $enctype = $enctype;
if(strtolower($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;
$Atype = split("/",$ctype);
$Acdisp = split(";",$cdisp);
$tenc = strtolower($headers["content-transfer-encoding"]);
if($Atype == "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;
$filename = substr($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 != "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;
} 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);
$parts = explode(" ",$mydate);
if(count($parts) < 4) { return time(); }
$day = $parts;
switch(strtolower($parts)) {
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;
$ahours = explode(":",$parts);
$hour = $ahours; $min = $ahours; $sec = $ahours;
return mktime ($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 = $boundary;
if(substr($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;
}
}
?>
也许您在学习PHP的时候只想尽快的开发一个网站，也就会想我做网站，干嘛要学什么网页这些小儿科?不难看出，眼高手低的新手不在少数，这种思想无疑于建造空中楼阁，你不建地基，何来的房顶呢? 本人接触php时间不长，算是phper中的小菜鸟一只吧。由于刚开始学的时候没有名师指，碰过不少疙瘩，呗很多小问题卡过很久，白白浪费不少宝贵的时间，在次分享一些子的学习的心得。 找到的的资料很多都是在论坛里的，需要注册，所以我一般没到一个论坛都注册一个id，所有的id都注册成一样的，这样下次再进来的时候就不用重复注册啦。当然有些论坛的某些资料是需要的付费的。 其实没啥难的，多练习，练习写程序，真正的实践比看100遍都有用。不过要熟悉引擎 当然这种网站的会员费就几十块钱。 学好程序语言，多些才是王道，写两个小时代码的作用绝对超过看一天书，这个我是深有体会（顺便还能练打字速度）。 说php的话，首先得提一下数组，开始的时候我是最烦数组的，总是被弄的晕头转向，不过后来呢，我觉得数组里php里最强大的存储方法，所以建议新手们要学好数组。 在我安装pear包的时候老是提示，缺少某某文件，才发现 那群extension 的排列是应该有一点的顺序，而我安装的版本的排序不是正常的排序。没办法我只好把那群冒号加了上去，只留下我需要使用的扩展。 说php的话，首先得提一下数组，开始的时候我是最烦数组的，总是被弄的晕头转向，不过后来呢，我觉得数组里php里最强大的存储方法，所以建议新手们要学好数组。 基础有没有对学习php没有太大区别，关键是兴趣。 实践是检验自己会不会的真理。 如果你可以写完像留言板这样的程序，那么你可以去一些别人的代码了， 写js我最烦的就是 ie 和 firefox下同样的代码 结果显示的结果千差万别，还是就是最好不要用遨游去调试，因为有时候遨游是禁用js的，有可能代码是争取结果被遨游折腾的认为是代码写错。 开发工具也会慢慢的更专业，每个公司的可能不一样，但是zend studio是个大伙都会用的。 遇到出错的时候，我经常把错误信息直接复制到 google的搜索栏，一般情况都是能搜到结果的，不过有时候会搜出来一大片英文的出来，这时候就得过滤一下，吧中文的弄出来，挨着式方法。 对于懒惰的朋友，我推荐php的集成环境xampp或者是wamp。这两个软件安装方便，使用简单。但是我还是强烈建议自己动手搭建开发环境。 爱上php，他也会爱上你。 微软最近出的新字体“微软雅黑”，虽然是挺漂亮的，不过firefox支持的不是很好，所以能少用还是少用的好。 建议加几个专业的phper的群，当然啦需要说话的人多，一处一点问题能有人回答你的，当然啦要让人回答你的问题，平时就得躲在里面聊天，大家混熟啦，愿意回答你问题的人自然就多啦。 装在C盘下面可以利用windows的ghost功能可以还原回来（顺便当做是重转啦），当然啦我的编译目录要放在别的盘下，不然自己的劳动成果就悲剧啦。
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