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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>将密钥导出到文件中</title>
</head>
<body class="docs"><div id="layout">
<div id="layout-content"><div id="function.openssl-pkey-export-to-file" class="refentry">
<div class="refnamediv">
<h1 class="refname">openssl_pkey_export_to_file</h1>
<p class="verinfo">(PHP 4 &gt;= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">openssl_pkey_export_to_file</span> &mdash; <span class="dc-title">将密钥导出到文件中 </span></p>
</div>
<div class="refsect1 description" id="refsect1-function.openssl-pkey-export-to-file-description">
<h3 class="title">说明</h3>
<div class="methodsynopsis dc-description">
<span class="methodname"><strong>openssl_pkey_export_to_file</strong></span>
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$key</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$outfilename</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$passphrase</code></span>
[, <span class="methodparam"><span class="type">array</span> <code class="parameter">$configargs</code></span>
]] ) : <span class="type">bool</span></div>
<p class="para rdfs-comment">
<span class="function"><strong>openssl_pkey_export_to_file()</strong></span> 将 ascii 格式
(PEM编码)的 <code class="parameter">key</code> 保存到名为<code class="parameter">outfilename</code>文件中。
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<span class="simpara">
必须安装有效的 <var class="filename">openssl.cnf</var> 以保证此函数正确运行。参考有关<a href="openssl.installation.html" class="link">安装</a>的说明以获得更多信息。
</span>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-function.openssl-pkey-export-to-file-parameters">
<h3 class="title">参数</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">key</code></dt>
<dd>
<p class="para">
</p>
</dd>
<dt>
<code class="parameter">outfilename</code></dt>
<dd>
<p class="para">
输出文件的路径。
</p>
</dd>
<dt>
<code class="parameter">passphrase</code></dt>
<dd>
<p class="para">
密钥可以通过值为<code class="parameter">passphrase</code>的密码来保护。
</p>
</dd>
<dt>
<code class="parameter">configargs</code></dt>
<dd>
<p class="para">
<code class="parameter">configargs</code> 可以用来调整导出流程通过指定或者覆盖openssl配置文件选项。参见 <span class="function"><a href="openssl_csr_new.html" class="function">openssl_csr_new()</a></span> 获取更多关于 <code class="parameter">configargs</code> 的信息。
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.openssl-pkey-export-to-file-returnvalues">
<h3 class="title">返回值</h3>
<p class="para">
成功时返回 <strong><code>TRUE</code></strong> 或者在失败时返回 <strong><code>FALSE</code></strong>
</p>
</div>
</div></div></div></body></html>