php-doc-en/reference/openssl/setup.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->

<chapter xml:id="openssl.setup" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 &reftitle.setup;

 <!-- {{{ Requirements -->
 <section xml:id="openssl.requirements">
  &reftitle.required;
  <para>
   In order to use the OpenSSL functions you need to install the <link
   xlink:href="&url.openssl;">OpenSSL</link> library.
   PHP 7 requires at least OpenSSL &gt;= 0.9.8. Other versions
   (PHP &gt;= 7.1.0) require OpenSSL &gt;= 1.0.1.
  </para>
  <warning>
   <para>
    You are strongly encouraged to use the most recent OpenSSL version,
    otherwise your web server could be vulnerable to attack.
   </para>
  </warning>
 </section>
 <!-- }}} -->

 <!-- {{{ Installation -->
 &reference.openssl.configure;
 <!-- }}} -->

 <!-- {{{ Configuration -->
 &reference.openssl.ini;
 <!-- }}} -->

 <!-- {{{ Resources -->
 <section xml:id="openssl.resources">
  &reftitle.resources;
  <para>
   Prior to PHP 8.0.0, there were 3 resource types defined in the OpenSSL module:
   <simplelist>
    <member><literal>OpenSSL key</literal></member>
    <member><literal>OpenSSL X.509</literal></member>
    <member><literal>OpenSSL X.509 CSR</literal></member>
   </simplelist>
  </para>
 </section>
 <!-- }}} -->

</chapter>

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