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quoted_printable_encode does not encode trailing space

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評估

難度
2/5
預估耗時
1-3 小時
新手友好度
64/100
Issue 類型
缺陷
描述清晰度
描述清楚
活躍度
活躍
技術堆疊
c, php
領域
backend

研究方向

首先在 PHP 原始碼樹中找出 quoted_printable_encode 的實作及其現有測試；issue 沒有指定特定檔案。使用結尾帶有空格的範例重現問題，接著檢查編碼後的輸出是否以 =20 結尾，這是所引用的 RFC 2045 規則所要求的。

由索引模型根據 Issue 內容生成。

描述

Bug Status: Needs Triage
Description

The following code:

<?php
var_dump(quoted_printable_encode('hello '));

Resulted in this output:

string(6) "hello "

But I expected this output instead:

string(9) "hello=20"

RFC 2045 says:

(3)   (White Space) Octets with values of 9 and 32 MAY be
      represented as US-ASCII TAB (HT) and SPACE characters,
      respectively, but MUST NOT be so represented at the end
      of an encoded line.  Any TAB (HT) or SPACE characters
      on an encoded line MUST thus be followed on that line
      by a printable character.  In particular, an "=" at the
      end of an encoded line, indicating a soft line break
      (see rule #5) may follow one or more TAB (HT) or SPACE
      characters.  It follows that an octet with decimal
      value 9 or 32 appearing at the end of an encoded line
      must be represented according to Rule #1.  This rule is
      necessary because some MTAs (Message Transport Agents,
      programs which transport messages from one user to
      another, or perform a portion of such transfers) are
      known to pad lines of text with SPACEs, and others are
      known to remove "white space" characters from the end
      of a line.  Therefore, when decoding a Quoted-Printable
      body, any trailing white space on a line must be
      deleted, as it will necessarily have been added by
      intermediate transport agents.
PHP Version
PHP 8.7.0-dev (cli) (built: Oct 18 2026 16:29:33) (NTS DEBUG)
Copyright © The PHP Group and Contributors
Zend Engine v4.7.0-dev, Copyright © Zend by Perforce
    with Zend OPcache v8.7.0-dev, Copyright ©, by Zend by Perforce
Operating System

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