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<?xml version="1.0" encoding="utf-8"?>
<reference xml:id="class.random-engine" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
<title>The Random\Engine interface</title>
<titleabbrev>Random\Engine</titleabbrev>
<partintro>
<!-- {{{ Random\Engine intro -->
<section xml:id="random-engine.intro">
&reftitle.intro;
<para>
A <classname>Random\Engine</classname> provides a low-level source of randomness by
returning random bytes that are consumed by high-level APIs to perform their operations.
The <classname>Random\Engine</classname> interface allows swapping out the algorithm
used to generate randomness, because each algorithm makes different tradeoffs to fit
specific use-cases. Some algorithms are very fast, but generate lower-quality randomness,
whereas other algorithms are slower, but generate better randomness, up to
cryptographically secure randomness as provided by the <classname>Random\Engine\Secure</classname>
engine.
</para>
<para>
PHP provides several <classname>Random\Engine</classname>s out of the box to accomodate
different use-cases. The <classname>Random\Engine\Secure</classname> engine that is
backed by a <acronym>CSPRNG</acronym> is the recommended safe default choice, unless
the application requires either reproducible sequences or very high performance.
</para>
</section>
<!-- }}} -->
<section xml:id="random-engine.synopsis">
&reftitle.interfacesynopsis;
<!-- {{{ Synopsis -->
<classsynopsis class="interface">
<oointerface>
<interfacename>Random\Engine</interfacename>
</oointerface>
<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.random-engine')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[@role='Random\\Engine'])">
<xi:fallback/>
</xi:include>
</classsynopsis>
<!-- }}} -->
</section>
</partintro>
&reference.random.random.engine.generate;
</reference>
<!-- Keep this comment at the end of the file
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sgml-always-quote-attributes:t
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sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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End:
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-->
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