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<title>Gets an exportable representation of a key into a file</title>
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<h1 class="refname">openssl_pkey_export_to_file</h1>
<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5)</p><p class="refpurpose"><span class="refname">openssl_pkey_export_to_file</span> — <span class="dc-title">Gets an exportable representation of a key into a file </span></p>
</div>
<div class="refsect1 description" id="refsect1-function.openssl-pkey-export-to-file-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <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>
]] )</div>
<p class="para rdfs-comment">
<span class="function"><strong>openssl_pkey_export_to_file()</strong></span> saves an ascii-armoured
(PEM encoded) rendition of <em><code class="parameter">key</code></em> into the file named
by <em><code class="parameter">outfilename</code></em>.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<span class="simpara">
You need to have a valid <var class="filename">openssl.cnf</var> installed for
this function to operate correctly.
See the notes under <a href="openssl.installation.html" class="link">the installation
section</a> for more information.
</span>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-function.openssl-pkey-export-to-file-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">key</code></em></span>
<dd>
<p class="para">
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">outfilename</code></em></span>
<dd>
<p class="para">
Path to the output file.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">passphrase</code></em></span>
<dd>
<p class="para">
The key can be optionally protected by a
<em><code class="parameter">passphrase</code></em>.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">configargs</code></em></span>
<dd>
<p class="para">
<em><code class="parameter">configargs</code></em> can be used to fine-tune the export
process by specifying and/or overriding options for the openssl
configuration file. See <span class="function"><a href="function.openssl-csr-new.html" class="function">openssl_csr_new()</a></span> for more
information about <em><code class="parameter">configargs</code></em>.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.openssl-pkey-export-to-file-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
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