Decoding POP3 emails using PHP - PHP tutorial-PHP Tutorial-php.cn

Decoding POP3 emails using PHP - PHP tutorial

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Release： 2016-07-13 17:26:55

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A preliminary understanding of the source files of emails (Author: Chen Junqing, October 24, 2000 15:08) This article briefly explains the principles of receiving emails through the POP3 protocol and decoding MIME emails; for receiving and MIME decoding, two practical PHP are provided class, and provides examples of usage. It is divided into two parts: mail collection and MIME decoding. We have already introduced you to the collection of emails, now let us introduce you to the decoding part of this article. In the previous article, we have completed an example of using PHP to receive emails through POP3. However, when using this class, I believe you have seen that many emails received are a bunch of garbled characters that you cannot understand at all! Yes. Most of today's emails have been encoded and require a decoding process before they can be turned into the text, pictures, or other attachments we are used to. The source file of the email. First, let’s take a look at the source file of a simple email: (In Foxmail, select the email and click “View Source File” to see something like this) 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 ----=_NextPart_000_0007_01C03166.5B1E9510 　Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 　w7vT0MLSwuuwyaO/DQo= 　 ------=_NextPart_000_0007_01C0316 6.5B1E9510 　Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: base64 PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMCBUcmFuc2l0aW9uYWwv 0idGV4dC9odG1sOyBjaGFyc2V0PWdi 　MjMxMiIgaHR0cC1lcXVpdj1Db250ZW50LVR5cGU+DQo8TUVUQSBjb250ZW50PSJNU0hUTUwgNS4w 　MC4yOTIwLjAiIG5hbWU9R0VORVJBVE9SPg 0KPFNUWUxFPjwvU1RZTEU+DQo8L0hFQUQ+DQo8Qk9E 　WSBiZ0NvbG9yPSNmZmZmZmY+DQo8RElWPjxGT05UIHNpemU9Mj7Du9PQwtLC67DJo788L0ZPTlQ+ 　PC9ESVY+PC9CT0RZPjw vSFRNTD4NCg== 　------=_NextPart_000_0007_01C03166.5B1E9510- 　　I don’t think anyone has such an email Can understand. Don't worry, let's take a closer look at these contents. From: To: This is easy to understand. The email is sent by boy@netease.com and the recipient is boss_ch@china.com. We can basically understand the meaning of these tags literally, like Date :Sun, 8 Oct 2000 20:28:45 +0800 represents the time, X-Priority: 3 represents the priority of the email, X-Mailer: Microsoft Outlook Express 5.00.2919.6700 represents the name of the email sender, Outlook 5 is used here, but these things have little to do with the content of the email. We don’t need to delve into it.