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<?xml version="1.0" encoding="utf-8"?>
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<chapter xml:id="mongodb.setup" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
&reftitle.setup;
<section xml:id="mongodb.requirements">
&reftitle.required;
<para>
As of version 1.16.0, the extension requires PHP 7.2 or higher. Previous
versions of the extension allow compatibility with older PHP versions.
</para>
<para>
The extension requires
<link xlink:href="&url.mongodb.libbson;">libbson</link> and
<link xlink:href="&url.mongodb.libmongoc;">libmongoc</link>, and will use
bundled versions of both libraries by default. System libraries may also be
used, as discussed in the
<link linkend="mongodb.installation.manual">manual installation</link>
documentation.
</para>
<para>
The extension, via libmongoc, optionally depends on a TLS library (e.g.
OpenSSL) and will use it if available. If the build process fails to find a
TLS library, users should check that the appropriate development package
(e.g. <literal>libssl-dev</literal>) and
<link xlink:href="&url.mongodb.wiki.pkg-config;">pkg-config</link> are both
installed. The process for detecting and configuring TLS libraries is
discussed in more detail in the
<link linkend="mongodb.installation.manual">manual installation</link>
documentation.
</para>
<para>
<link xlink:href="&url.cyrus;">Cyrus SASL</link> is an optional dependency to
support Kerberos authentication and will be used if available.
</para>
<note>
<simpara>
Due to potential problems representing 64-bit integers on 32-bit platforms,
users are advised to use 64-bit environments. When using a 32-bit platform,
be aware that any 64-bit integer read from the database will be returned as
a <classname>MongoDB\BSON\Int64</classname> instance instead of a PHP
integer type.
</simpara>
</note>
</section>
&reference.mongodb.configure;
&reference.mongodb.ini;
<!--
<section xml:id="mongodb.resources">
&reftitle.resources;
<para>
</para>
</section>
-->
</chapter>
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