php-doc-en/reference/hash/reference.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.6 $ -->
<!-- Purpose: mathcrypto.crypto -->
<!-- Membership: bundled, pecl -->
<!-- State: experimental -->
<reference xml:id="ref.hash" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <title>hash Functions</title>
 <titleabbrev>hash</titleabbrev>

 <partintro>

  <section xml:id="hash.intro">
   &reftitle.intro;
   <para>
    Message Digest (hash) engine.  Allows direct or incremental processing
    of arbitrary length messages using a variety of hashing algorithms.
   </para>
  </section>

  <section xml:id="hash.requirements">
   &reftitle.required;
   <simpara>
    The Hash extension requires no external libraries and is enabled by
    default as of PHP 5.1.2.  It may be explicitly disabled by using the
    --disable-hash switch to configure.  Earlier versions of PHP may
    incorporate the Hash extension by installing the
    <link xlink:href="&url.pecl.package;hash">PECL module</link>.
   </simpara>
  </section>

  <section xml:id="hash.resources">
   &reftitle.resources;
   <para>
    This extension defines a Hashing Context resource returned by
    <function>hash_init</function>.
   </para>
  </section>

  <!-- Information found in constants.xml -->
  &reference.hash.constants;

 </partintro>

 &reference.hash.functions;

</reference>

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