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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.openssl-pkey-get-public">
 <refnamediv>
  <refname>openssl_pkey_get_public</refname>
  <refpurpose>Extract public key from certificate and prepare it for use</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>resource</type><methodname>openssl_pkey_get_public</methodname>
   <methodparam><type>mixed</type><parameter>certificate</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>openssl_get_publickey</function> extracts the public key from
   <parameter>certificate</parameter> and prepares it for use by other
   functions.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>certificate</parameter></term>
     <listitem>
      <para>
       <parameter>certificate</parameter> can be one of the following:
       <orderedlist>
        <listitem><simpara>an X.509 certificate resource</simpara></listitem>
        <listitem><simpara>a string having the format
          <filename>file://path/to/file.pem</filename>. The named file must
          contain a PEM encoded certificate/private key (it may contain both).
         </simpara>
        </listitem>
        <listitem><simpara>A PEM formatted private key.</simpara></listitem>
       </orderedlist>
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns a positive key resource identifier on success, or &false; on error.
  </para>
 </refsect1>

</refentry>

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