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<title>Extract public key from certificate and prepare it for use</title>
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<h1 class="refname">openssl_pkey_get_public</h1>
<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5)</p><p class="refpurpose"><span class="refname">openssl_pkey_get_public</span> — <span class="dc-title">Extract public key from certificate and prepare it for use</span></p>
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<div class="refsect1 description" id="refsect1-function.openssl-pkey-get-public-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">resource</span> <span class="methodname"><strong>openssl_pkey_get_public</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">$certificate</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><a href="function.openssl-get-publickey.html" class="function">openssl_get_publickey()</a></span> extracts the public key from
<em><code class="parameter">certificate</code></em> and prepares it for use by other
functions.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.openssl-pkey-get-public-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">certificate</code></em></span>
<dd>
<p class="para">
<em><code class="parameter">certificate</code></em> can be one of the following:
<ol type="1">
<li class="listitem"><span class="simpara">an X.509 certificate resource</span></li>
<li class="listitem"><span class="simpara">a string having the format
<var class="filename">file://path/to/file.pem</var>. The named file must
contain a PEM encoded certificate/private key (it may contain both).
</span>
</li>
<li class="listitem"><span class="simpara">A PEM formatted private key.</span></li>
</ol>
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.openssl-pkey-get-public-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns a positive key resource identifier on success, or <strong><code>FALSE</code></strong> on error.
</p>
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