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154 lines
7.2 KiB
HTML
154 lines
7.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>为 MIME 头编码字符串</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.mb-encode-mimeheader" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mb_encode_mimeheader</h1>
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<p class="verinfo">(PHP 4 >= 4.0.6, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">mb_encode_mimeheader</span> — <span class="dc-title">为 MIME 头编码字符串</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mb-encode-mimeheader-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>mb_encode_mimeheader</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$charset</code><span class="initializer"> = determined by mb_language()</span></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$transfer_encoding</code><span class="initializer"> = "B"</span></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$linefeed</code><span class="initializer"> = "\r\n"</span></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$indent</code><span class="initializer"> = 0</span></span>
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]]]] ) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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按 MIME 头编码方案将指定的<span class="type"><span class="type 字符串">字符串</span></span> <code class="parameter">str</code> 进行编码。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mb-encode-mimeheader-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">str</code></dt>
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<dd>
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<p class="para">
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要编码的 <span class="type"><a href="language.types.string.html" class="type string">string</a></span>。
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它的编码应该和 <span class="function"><a href="mb_internal_encoding.html" class="function">mb_internal_encoding()</a></span> 一样。
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</p>
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</dd>
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<dt>
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<code class="parameter">charset</code></dt>
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<dd>
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<p class="para">
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<code class="parameter">charset</code> 指定了 <code class="parameter">str</code> 的字符集名。
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其默认值由当前的 NLS 设置（<em>mbstring.language</em>）来确定。
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</p>
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</dd>
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<dt>
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<code class="parameter">transfer_encoding</code></dt>
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<dd>
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<p class="para">
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<code class="parameter">transfer_encoding</code> 指定了 MIME 的编码方案。
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它可以是 <em>"B"</em>（Base64）也可以是 <em>"Q"</em>（Quoted-Printable）。
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如果未设置，将回退为 <em>"B"</em>。
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</p>
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</dd>
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<dt>
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<code class="parameter">linefeed</code></dt>
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<dd>
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<p class="para">
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<code class="parameter">linefeed</code> 指定了 EOL（行尾）标记，使 <span class="function"><strong>mb_encode_mimeheader()</strong></span> 执行了一个换行（<a href="http://www.faqs.org/rfcs/rfc2822" class="link external">» RFC</a> 文档中规定，超过长度的一行将换成多行，当前该长度硬式编码为 74 个字符）。
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如果没有设定，则回退为 <em>"\r\n"</em> (CRLF)。
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</p>
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</dd>
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<dt>
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<code class="parameter">indent</code></dt>
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<dd>
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<p class="para">
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首行缩进（header 里 <code class="parameter">str</code> 前的字符数目）。
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.mb-encode-mimeheader-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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转换后的<span class="type"><span class="type 字符串">字符串</span></span>版本以 ASCII 形式表达。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.mb-encode-mimeheader-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-3182">
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<p><strong>Example #1 <span class="function"><strong>mb_encode_mimeheader()</strong></span> 例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$name </span><span style="color: #007700">= </span><span style="color: #DD0000">""</span><span style="color: #007700">; </span><span style="color: #FF8000">// kanji<br /></span><span style="color: #0000BB">$mbox </span><span style="color: #007700">= </span><span style="color: #DD0000">"kru"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$doma </span><span style="color: #007700">= </span><span style="color: #DD0000">"gtinn.mon"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$addr </span><span style="color: #007700">= </span><span style="color: #0000BB">mb_encode_mimeheader</span><span style="color: #007700">(</span><span style="color: #0000BB">$name</span><span style="color: #007700">, </span><span style="color: #DD0000">"UTF-7"</span><span style="color: #007700">, </span><span style="color: #DD0000">"Q"</span><span style="color: #007700">) . </span><span style="color: #DD0000">" <" </span><span style="color: #007700">. </span><span style="color: #0000BB">$mbox </span><span style="color: #007700">. </span><span style="color: #DD0000">"@" </span><span style="color: #007700">. </span><span style="color: #0000BB">$doma </span><span style="color: #007700">. </span><span style="color: #DD0000">">"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">$addr</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.mb-encode-mimeheader-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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这个函数没有设计成据更高级上下文的中断点来换行（单词边界等）。
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这个特性将导致意外的空格可能会让原始字符串看上去很乱。
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.mb-encode-mimeheader-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="mb_decode_mimeheader.html" class="function" rel="rdfs-seeAlso">mb_decode_mimeheader()</a> - 解码 MIME 头字段中的字符串</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |