reference/hash/functions/hash-hmac-file.xml
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50960545e781ff94ba371befc04346de48a0bb82
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>string</type><methodname>hash_hmac_file</methodname>
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<type class="union"><type>string</type><type>false</type></type><methodname>hash_hmac_file</methodname>
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<methodparam><type>string</type><parameter>algo</parameter></methodparam>
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<methodparam><type>string</type><parameter>filename</parameter></methodparam>
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<methodparam><type>string</type><parameter>key</parameter></methodparam>
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<methodparam choice="opt"><type>bool</type><parameter>raw_output</parameter><initializer>&false;</initializer></methodparam>
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<methodparam choice="opt"><type>bool</type><parameter>binary</parameter><initializer>&false;</initializer></methodparam>
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</methodsynopsis>
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</refsect1>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>raw_output</parameter></term>
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<term><parameter>binary</parameter></term>
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<listitem>
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<para>
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When set to &true;, outputs raw binary data.
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&reftitle.returnvalues;
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<para>
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Returns a string containing the calculated message digest as lowercase hexits
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unless <parameter>raw_output</parameter> is set to true in which case the raw
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unless <parameter>binary</parameter> is set to true in which case the raw
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binary representation of the message digest is returned.
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Returns &false; when <parameter>algo</parameter> is unknown or is a
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non-cryptographic hash function, or if the file
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<parameter>filename</parameter> cannot be read.
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Returns &false; if the file <parameter>filename</parameter> cannot be read.
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</para>
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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<para>
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Throws a <classname>ValueError</classname> exception if
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<parameter>algo</parameter> is unknown or is a non-cryptographic hash function.
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</para>
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</refsect1>
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</thead>
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<tbody>
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<row>
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<entry>8.0.0</entry>
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<entry>
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Now throws a <classname>ValueError</classname> exception if
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<parameter>algo</parameter> is unknown or is a non-cryptographic hash
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function; previously, &false; was returned instead.
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</entry>
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</row>
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<row>
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<entry>7.2.0</entry>
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<entry>Usage of non-cryptographic hash functions (adler32, crc32, crc32b, fnv132, fnv1a32, fnv164, fnv1a64, joaat) was disabled.</entry>
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</row>
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/* Create a file to calculate hash of */
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file_put_contents('example.txt', 'The quick brown fox jumped over the lazy dog.');
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echo hash_hmac_file('md5', 'example.txt', 'secret');
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echo hash_hmac_file('sha256', 'example.txt', 'secret');
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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7eb2b5c37443418fc77c136dd20e859c
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9c5c42422b03f0ee32949920649445e417b2c634050833c5165704b825c2a53b
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]]>
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</screen>
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</example>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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