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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- Generated by xml_proto.php v2.3. Found in /scripts directory of phpdoc. -->
<refentry xml:id="function.hash-file" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>hash_file</refname>
<refpurpose>Generate a hash value using the contents of a given file</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>string</type><type>false</type></type><methodname>hash_file</methodname>
<methodparam><type>string</type><parameter>algo</parameter></methodparam>
<methodparam><type>string</type><parameter>filename</parameter></methodparam>
<methodparam choice="opt"><type>bool</type><parameter>binary</parameter><initializer>&false;</initializer></methodparam>
<methodparam choice="opt"><type>array</type><parameter>options</parameter><initializer>[]</initializer></methodparam>
</methodsynopsis>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>algo</parameter></term>
<listitem>
<para>
Name of selected hashing algorithm (e.g. <literal>"sha256"</literal>).
For a list of supported algorithms see <function>hash_algos</function>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>filename</parameter></term>
<listitem>
<para>
URL describing location of file to be hashed; Supports <function>fopen</function> wrappers.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>binary</parameter></term>
<listitem>
<para>
When set to &true;, outputs raw binary data.
&false; outputs lowercase hexits.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>options</parameter></term>
<listitem>
<para>
An array of options for the various hashing algorithms.
Currently, only the <literal>"seed"</literal> parameter is
supported by the MurmurHash variants.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns a string containing the calculated message digest as lowercase hexits
unless <parameter>binary</parameter> is set to true in which case the raw
binary representation of the message digest is returned.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.1.0</entry>
<entry>The <parameter>options</parameter> parameter has been added.</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Using <function>hash_file</function></title>
<programlisting role="php">
<![CDATA[
<?php
/* Create a file to calculate hash of */
file_put_contents('example.txt', 'The quick brown fox jumped over the lazy dog.');
echo hash_file('sha256', 'example.txt');
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
68b1282b91de2c054c36629cb8dd447f12f096d3e3c587978dc2248444633483
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>hash_init</function></member>
<member><function>hash_hmac_file</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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sgml-parent-document:nil
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-->
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