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Homephp教程php手册用 PHP 实现 POP3 邮件的解码(1)

用 PHP 实现 POP3 邮件的解码(1)

Jun 13, 2016 am 11:20 AM
phppop3protocolaccomplishSource Fileuseofdecodingpassmail

初步认识邮件的源文件
  本文简要说明了通过POP3协议收取邮件、MIME邮件的解码的原理;针对收取和MIME解码,提供了两个实用的PHP类,并提供了使用的样例。分为邮件收取、MIME解码两个部分。我们已经向您介绍过了邮件的收取,现在让我们来为您介绍本文的解码部。
  在上一篇里,我们已经完成了一个用PHP通过POP3收取邮件的实例,可是在使用这个类的时候,相信你已经看到了,很多的邮件收下来是一堆乱码,自己根本看不懂!是的。现在的邮件大部分都已经经过了编码,需要一个解码的过程才能变成我们习惯的文字、图片、或是其它的附件。
  邮件的源文件
  首先,我们来看一段简单的邮件的源文件:(在Foxmail中,选中邮件,点选“查看源文件”就会看到这样的些内容了)
  From:
  To:
  Subject: =?gb2312?B?xOO6w6Oh?=
  Date: Sun, 8 Oct 2000 20:28:45 +0800
  MIME-Version: 1.0
  Content-Type: multipart/alternative;
   boundary="----=_NextPart_000_0007_01C03166.5B1E9510"
  X-Priority: 3
  X-MSMail-Priority: Normal
  X-Mailer: Microsoft Outlook Express 5.00.2919.6700
  X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6700
  This is a multi-part message in MIME format.
  ------=_NextPart_000_0007_01C03166.5B1E9510
  Content-Type: text/plain;
   charset="gb2312"
  Content-Transfer-Encoding: base64
  w7vT0MLSwuuwyaO/DQo=
  ------=_NextPart_000_0007_01C03166.5B1E9510
  Content-Type: text/html;
   charset="gb2312"
  Content-Transfer-Encoding: base64
  PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMCBUcmFuc2l0aW9uYWwv
  L0VOIj4NCjxIVE1MPjxIRUFEPg0KPE1FVEEgY29udGVudD0idGV4dC9odG1sOyBjaGFyc2V0PWdi
  MjMxMiIgaHR0cC1lcXVpdj1Db250ZW50LVR5cGU+DQo8TUVUQSBjb250ZW50PSJNU0hUTUwgNS4w
  MC4yOTIwLjAiIG5hbWU9R0VORVJBVE9SPg0KPFNUWUxFPjwvU1RZTEU+DQo8L0hFQUQ+DQo8Qk9E
  WSBiZ0NvbG9yPSNmZmZmZmY+DQo8RElWPjxGT05UIHNpemU9Mj7Du9PQwtLC67DJo788L0ZPTlQ+
  PC9ESVY+PC9CT0RZPjwvSFRNTD4NCg==

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