<?xml version="1.0" encoding="utf-8"?>
<sect1 xml:id="migration84.other-changes">
 <title>Other Changes</title>

 <sect2 xml:id="migration84.other-changes.core">
  <title>Core changes</title>

  <sect3 xml:id="migration84.other-changes.core.closures">
   <title>Closures</title>

   <simpara>
    Closure names have been adjusted to include the parent function's name
    and the line of definition to make them easier to distinguish, for example
    within stack traces.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.core.fibers">
   <title>Fibers</title>

   <simpara>
    Fiber switching during destructor execution is now allowed. It was previously
    blocked due to conflicts with garbage collection.
   </simpara>

   <simpara>
    Destructors may now be executed in a separate Fiber:
   </simpara>

   <simpara>
    When garbage collection is triggered in a Fiber,
    destructors called by the GC are executed in a separate Fiber:
    the gc_destructor_fiber.
    If this Fiber suspends, a new one is created to execute the remaining
    destructors.
    The previous gc_destructor_fiber is not referenced anymore by the GC
    and may be collected if it's not referenced anywhere else.
    Objects whose destructor is suspended will not be collected until the
    destructor returns or the <classname>Fiber</classname> is collected.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.core.output">
   <title>Output Handlers</title>

   <simpara>
    Output handler status flags passed to the <parameter>flags</parameter>
    parameter of <function>ob_start</function> are now cleared.
   </simpara>

   <simpara>
    <function>output_add_rewrite_var</function> now uses
    <link linkend="ini.url-rewriter.hosts"><literal>url_rewriter.hosts</literal></link>
    instead of
    <link linkend="ini.session.trans-sid-hosts"><literal>session.trans_sid_hosts</literal></link>
    for selecting hosts that will be rewritten.
   </simpara>
  </sect3>
 </sect2>

 <sect2 xml:id="migration84.other-changes.sapi">
  <title>Changes in SAPI Modules</title>

  <sect3 xml:id="migration84.other-changes.sapi.apache">
   <title>apache2handler</title>

   <simpara>
    Support for EOL Apache 2.0 and 2.2 has been removed.
    Minimum required Apache version is now 2.4.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.sapi.cli">
   <title>CLI</title>

   <simpara>
    The builtin server looks for an index file recursively by traversing parent
    directories in case the specified file cannot be located.
    This process was previously skipped if the path looked like it was
    referring to a file, i.e. if the last path component contained a period.
    In that case, a 404 error was returned.
    The behavior has been changed to look for an index file in all cases.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.sapi.fpm">
   <title>FPM</title>

   <simpara>
    Flushing headers without a body will now succeed.
    <!-- See GH-12785. -->
   </simpara>

   <simpara>
    Status page has a new field to display a memory peak.
   </simpara>

   <simpara>
    <!-- TODO Does this need a link? -->
    The <filename>/dev/poll</filename> <literal>events.mechanism</literal>
    setting for Solaris/Illumos had been retired.
   </simpara>
  </sect3>
 </sect2>

 <sect2 xml:id="migration84.other-changes.functions">
  <title>Changed Functions</title>

  <sect3 xml:id="migration84.other-changes.functions.core">
   <title>Core</title>

   <simpara>
    <function>trigger_error</function> and <function>user_error</function>
    now have a return type of <type>true</type> instead of <type>bool</type>.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.dom">
   <title>DOM</title>

   <simpara>
    <methodname>DOMDocument::registerNodeClass</methodname>
    now has a tentative return type of <type>true</type> instead of
    <type>bool</type>.
    It could only ever return &true; in practice.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.hash">
   <title>Hash</title>

   <simpara>
    <function>hash_update</function>
    now has a tentative return type of <type>true</type> instead of
    <type>bool</type>.
    It could only ever return &true; in practice.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.intl">
   <title>Intl</title>

   <simpara>
    <constant>NumberFormatter::ROUND_TOWARD_ZERO</constant> and
    <constant>NumberFormatter::ROUND_AWAY_FROM_ZERO</constant>
    have been added as aliases for
    <constant>NumberFormatter::ROUND_DOWN</constant> and
    <constant>NumberFormatter::ROUND_UP</constant>
    to be consistent with the new
    <constant>PHP_ROUND_<replaceable>*</replaceable></constant> modes.
   </simpara>

   <simpara>
    <methodname>ResourceBundle::get</methodname>
    <!-- TODO Use a proper union type for the return type -->
    now has a tentative return type of <literal>ResourceBundle|array|string|int|null</literal>.
   </simpara>

   <simpara>
    The <function>idn_to_ascii</function> and <function>idn_to_utf8</function>
    functions now always throw <exceptionname>ValueError</exceptionname>s
    if the <parameter>domain</parameter> name is empty or too long.
   </simpara>

   <simpara>
    The <function>idn_to_ascii</function> and <function>idn_to_utf8</function>
    functions now always throw <exceptionname>ValueError</exceptionname>
    if the <parameter>variant</parameter> parameter is not
    <constant>INTL_IDNA_VARIANT_UTS46</constant>.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.libxml">
   <title>LibXML</title>

   <simpara>
    <function>libxml_set_streams_context</function> now immediately throws a
    <exceptionname>TypeError</exceptionname> when a non-stream-context
    resource is passed to the function,
    instead of throwing later when the stream context is used.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.mbstring">
   <title>MBString</title>

   <simpara>
    The behavior of <function>mb_strcut</function> is more consistent
    now on invalid UTF-8 and UTF-16 strings.
    There is no behavioural change for valid UTF-8 and UTF-16 strings.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.odbc">
   <title>ODBC</title>

   <simpara>
    The <parameter>row</parameter> of
    <function>odbc_fetch_object</function>,
    <function>odbc_fetch_array</function>, and
    <function>odbc_fetch_into</function> now have a default value of &null;,
    consistent with <function>odbc_fetch_row</function>.
    Previously, the default values were
    <literal>-1</literal>,
    <literal>-1</literal>,
    and <literal>0</literal>,
    respectively.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.openssl">
   <title>OpenSSL</title>

   <simpara>
    The <parameter>extra_attributes</parameter> in
    <function>openssl_csr_new</function> sets the <acronym>CSR</acronym>
    attributes instead of subject DN, which incorrectly done previously.
   </simpara>

   <simpara>
    The <parameter>dn</parameter> in
    <function>openssl_csr_new</function> allows setting an <type>array</type>
    of values for a single entry.
   </simpara>

   <simpara>
    New <parameter>serial_hex</parameter> added to
    <function>openssl_csr_sign</function> to allow setting serial numbers
    in the hexadecimal format.
   </simpara>

   <simpara>
    Parsing ASN.1 UTCTime with <function>openssl_x509_parse</function>
    fails if seconds are omitted for OpenSSL version below 3.2
    (<literal>-1</literal> is returned for such fields).
    OpenSSL version above 3.3 did not load such certificates already.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.pdo">
   <title>PDO</title>

   <simpara>
    It is now possible to fetch the value of the
    <constant>PDO::ATTR_STRINGIFY_FETCHES</constant> attribute with
    <methodname>PDO::getAttribute</methodname>.
   </simpara>

   <simpara>
    A new <constant>PDO::PGSQL_ATTR_RESULT_MEMORY_SIZE</constant>
    has been added to retrieve the memory usage of query results with
    <methodname>PDO::getAttribute</methodname> for drivers that support it.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.pdo-firebird">
   <title>PDO_FIREBIRD</title>

   <simpara>
    It is now possible to fetch the value of the
    <!-- TODO Is this a class constant of the driver class? -->
    <constant>FB_ATTR_DATE_FORMAT</constant>,
    <constant>FB_ATTR_TIME_FORMAT</constant>,
    <constant>FB_ATTR_TIMESTAMP_FORMAT</constant>,
    attributes with
    <!-- TODO Only for the specific driver class? -->
    <methodname>PDO::getAttribute</methodname>.
   </simpara>

   <para>
    Added new attributes to specify transaction isolation level and access mode.
    Five constants relating to this functionality have been added:

    <simplelist>
     <member><constant>Pdo\Firebird::TRANSACTION_ISOLATION_LEVEL</constant></member>
     <member><constant>Pdo\Firebird::READ_COMMITTED</constant></member>
     <member><constant>Pdo\Firebird::REPEATABLE_READ</constant></member>
     <member><constant>Pdo\Firebird::SERIALIZABLE</constant></member>
     <member><constant>Pdo\Firebird::WRITABLE_TRANSACTION</constant></member>
    </simplelist>
   </para>

   <simpara>
    When using persistent connections, there is now a liveliness check in the
    constructor.
   </simpara>

   <simpara>
    The content that is built changes depending on the value of
    <constant>FB_API_VER</constant> in
    <filename class="headerfile">ibase.h</filename>.
    A new static method <methodname>Pdo\Firebird::getApiVersion</methodname>
    can be used to obtain this information.
    This information is also now referenced in <function>phpinfo</function>.
   </simpara>

   <para>
    Five new data types are now available:
    <simplelist type="inline">
     <member><literal>INT128</literal></member>
     <member><literal>DEC16</literal></member>
     <member><literal>DEC34</literal></member>
     <member><literal>TIMESTAMP_TZ</literal></member>
     <member><literal>TIME_TZ</literal></member>
    </simplelist>
    .
    These are available starting with Firebird 4.0.
   </para>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.pdo-mysql">
   <title>PDO_MYSQL</title>

   <simpara>
    It is now possible to fetch the value of the
    <constant>PDO::ATTR_FETCH_TABLE_NAMES</constant> attribute with
    <!-- TODO Only for the specific driver class? -->
    <methodname>PDO::getAttribute</methodname>.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.pdo-pgsql">
   <title>PDO_PGSQL</title>

   <simpara>
    Support retrieving the memory usage of queries for
    <constant>PDO::PGSQL_ATTR_RESULT_MEMORY_SIZE</constant>.
   </simpara>

   <simpara>
    If the column is of type <literal>FLOAT4OID</literal> or
    <literal>FLOAT8OID</literal> the value will now be returned as a
    <type>float</type> instead of a <type>string</type>.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.pgsql">
   <title>PGSQL</title>

   <simpara>
    The <parameter>conditions</parameter> parameter of
    <function>pg_select</function> is now optional and accepts an empty array.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.phar">
   <title>Phar</title>

   <para>
    The
    <simplelist type="inline">
     <member><methodname>Phar::setAlias</methodname></member>
     <member><methodname>Phar::setDefaultStub</methodname></member>
    </simplelist>
    methods now have a tentative return type of <type>true</type>
    instead of <type>bool</type>.
   </para>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.posix">
   <title>POSIX</title>

   <simpara>
    <function>posix_isatty</function> now sets the error number when the
    file descriptor/stream argument is invalid.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.reflection">
   <title>Reflection</title>

   <simpara>
    <methodname>ReflectionGenerator::getFunction</methodname>
    may now be called after the generator finished executing.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.sockets">
   <title>Sockets</title>

   <simpara>
    The <parameter>backlog</parameter> parameter of
    <function>socket_create_listen</function> now has a default value of
    <constant>SOMAXCONN</constant>.
    Previously, it was <literal>128</literal>.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.sodium">
   <title>Sodium</title>

   <simpara>
    The <function>sodium_crypto_aead_aes256gcm_<replaceable>*</replaceable></function>
    functions are now available on aarch64 CPUs with the ARM cryptographic
    extensions.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.spl">
   <title>SPL</title>

   <para>
    The
    <simplelist type="inline">
     <member><methodname>SplPriorityQueue::insert</methodname></member>
     <member><methodname>SplPriorityQueue::recoverFromCorruption</methodname></member>
     <member><methodname>SplHeap::insert</methodname></member>
     <member><methodname>SplHeap::recoverFromCorruption</methodname></member>
    </simplelist>
    methods now have a tentative return type of <type>true</type>
    instead of <type>bool</type>.
   </para>

   <simpara>
    <classname>SplObjectStorage</classname> now implements
    <interfacename>SeekableIterator</interfacename>.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.functions.standard">
   <title>Standard</title>

   <simpara>

    The default <literal>'cost'</literal> value for the <constant>PASSWORD_BCRYPT</constant>
    hashing algorithm for <function>password_hash</function> has been increased from
    <literal>10</literal> to <literal>12</literal>.
    <!-- RFC: https://wiki.php.net/rfc/bcrypt_cost_2023 -->
   </simpara>

   <simpara>
    <function>debug_zval_dump</function> now indicates whether an array is packed.
   </simpara>

   <simpara>
    <function>long2ip</function> now has a return type of <type>string</type>
    <!-- TODO Proper union type -->
    instead of <literal>string|false</literal>.
   </simpara>

   <simpara>
    <!-- TODO Proper union type -->
    <function>highlight_string</function> now has a return type of
    <type>string|true</type> instead of <literal>string|bool</literal>.
   </simpara>

   <simpara>
    <!-- TODO Proper union type -->
    <function>print_r</function> now has a return type of
    <type>string|true</type> instead of <literal>string|bool</literal>.
   </simpara>

   <!-- TODO: Someone else take care of this - Girgias -->
   <sect4>
    <title>Rounding with <function>round</function></title>

    <simpara>
     The <parameter>mode</parameter> parameter of the
     <function>round</function> function has been widened to
     <!-- TODO Proper union type -->
     <literal>RoundingMode|int</literal>,
     <!-- TODO should be <enumname> ? -->
     accepting instances of a new <classname>RoundingMode</classname> enum.
     <!-- RFC: https://wiki.php.net/rfc/correctly_name_the_rounding_mode_and_make_it_an_enum -->
    </simpara>

    <para>
     Four new modes have been added to the <function>round</function> function:
     <simplelist type="inline">
      <member><!-- <enumidentifier> -->RoundingMode::PositiveInfinity<!-- </enumidentifier> --></member>
      <member><!-- <enumidentifier> -->RoundingMode::NegativeInfinity<!-- </enumidentifier> --></member>
      <member><!-- <enumidentifier> -->RoundingMode::TowardsZero<!-- </enumidentifier> --></member>
      <member><!-- <enumidentifier> -->RoundingMode::AwayFromZero<!-- </enumidentifier> --></member>
     </simplelist>
     <!-- RFC: https://wiki.php.net/rfc/new_rounding_modes_to_round_function -->
    </para>

    <simpara>
     The internal implementation for rounding to integers has been rewritten
     to be easier to verify for correctness and to be easier to maintain.
     Some rounding bugs have been fixed as a result of the rewrite.
     For example previously rounding <literal>0.49999999999999994</literal>
     to the nearest integer would have resulted in <literal>1.0</literal>
     instead of the correct result <literal>0.0</literal>.
     Additional inputs might also be affected and result in different outputs
     compared to earlier PHP versions.
    </simpara>

    <simpara>
     Fixed a bug caused by "pre-rounding" of the <function>round</function> function.
     Previously, using "pre-rounding" to treat a value like <literal>0.285</literal>
     (actually <literal>0.28499999999999998</literal>) as a decimal number
     and round it to <literal>0.29</literal>.
     However, "pre-rounding" incorrectly rounds certain numbers,
     so this fix removes "pre-rounding" and changes the way numbers are compared,
     so that the values are correctly rounded as decimal numbers.
    </simpara>

    <simpara>
     The maximum precision that can be handled by <function>round</function>
     has been extended by one digit.
     For example, <code>round(4503599627370495.5)</code> returned in
     <literal>4503599627370495.5</literal>,
     but now returns <literal>4503599627370496</literal>.
    </simpara>

   </sect4>
  </sect3>

 </sect2>

 <sect2 xml:id="migration84.other-changes.extensions">
  <title>Other Changes to Extensions</title>

  <sect3 xml:id="migration84.other-changes.extensions.curl">
   <title>cURL</title>

   <simpara>
    The minimum libcurl version required is now 7.61.0.
   </simpara>

   <simpara>
    The <constant>CURLOPT_DNS_USE_GLOBAL_CACHE</constant> option no longer
    has any effect, and is silently ignored.
    This underlying feature was deprecated in libcurl 7.11.1,
    and removed in libcurl 7.62.0.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.gmp">
   <title>GMP</title>

   <!-- RFC: https://wiki.php.net/rfc/fix_up_bcmath_number_class -->
   <simpara>
    Casting a <classname>GMP</classname> object to <type>bool</type> is now
    possible instead of emitting a <constant>E_RECOVERABLE_ERROR</constant>.
    The casting behaviour is overloaded such that a <classname>GMP</classname>
    object representing the value <literal>0</literal> is cast to &false;.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.libxml">
   <title>LibXML</title>

   <simpara>
    The minimum libxml2 version required is now 2.9.4.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.intl">
   <title>Intl</title>

   <simpara>
    The behaviour of Intl class has been normalized to always throw
    <exceptionname>Error</exceptionname> exceptions when attempting to use
    a non-initialized object, or when cloning fails.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.mbstring">
   <title>MBString</title>

   <simpara>
    Unicode data tables have been updated to Unicode 16.0.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.mysqlnd">
   <title>MySQLnd</title>

   <simpara>
    Support for the new VECTOR data type from MySQL 9.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.openssl">
   <title>OpenSSL</title>

   <simpara>
    The minimum OpenSSL version required is now 1.1.1.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.pdo-pgsql">
   <title>PDO_PGSQL</title>

   <simpara>
    The minimum libpq version required is now 10.0.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.pgsql">
   <title>PGSQL</title>

   <simpara>
    The minimum libpq version required is now 10.0.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.spl">
   <title>SPL</title>

   <simpara>
    Out of bounds accesses in <classname>SplFixedArray</classname> now throw
    exceptions of type <exceptionname>OutOfBoundsException</exceptionname>
    instead of <exceptionname>RuntimeException</exceptionname>.
    Because <exceptionname>OutOfBoundsException</exceptionname> is a child
    class of <exceptionname>RuntimeException</exceptionname> no behavioural
    changes are exhibited when attempting to catch those exceptions.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.xsl">
   <title>XSL</title>

   <simpara>
    The typed properties <property>XSLTProcessor::$cloneDocument</property>
    and <property>XSLTProcessor::$doXInclude</property> are now declared.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.extensions.zlib">
   <title>Zlib</title>

   <simpara>
    The minimum zlib version required is now 1.2.11.
   </simpara>
  </sect3>
 </sect2>

 <sect2 xml:id="migration84.other-changes.performance">
  <title>Performance</title>

  <sect3 xml:id="migration84.other-changes.performance.core">
   <title>Core</title>

   <simpara>
    Improved the performance of floating point number parsing and formatting in
    ZTS builds under highly concurrent loads.
    This affects the <function>printf</function> family of functions as well
    as serialization functions such as <function>json_encode</function>,
    or <function>serialize</function>.
   </simpara>

   <simpara>
    <function>sprintf</function> using only <literal>%s</literal> and
    <literal>%d</literal> specifiers will be compiled into the equivalent
    string interpolation, avoiding the overhead of a function call and
    repeatedly parsing the format string.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.bcmath">
   <title>BCMath</title>

   <simpara>
    Improved performance of number conversions and operations.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.dom">
   <title>DOM</title>

   <simpara>
    The performance of <methodname>DOMNode::C14N</methodname> is greatly
    improved for the case without an xpath query.
    This can give a time improvement of easily two order of
    magnitude for documents with tens of thousands of nodes.
   </simpara>

   <simpara>
    Improved performance and reduce memory consumption of XML serialization.
   </simpara>

   <simpara>
    Reduced memory usage of node classes.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.ftp">
   <title>FTP</title>

   <simpara>
    Improved the performance of FTP uploads up to a factor of 10x for large
    uploads.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.hash">
   <title>Hash</title>

   <simpara>
    Added SSE2 and SHA-NI implementations of SHA-256.
    This improves the performance on supported CPUs by ~1.3x (SSE2),
    and 3x - 5x (SHA-NI).
    Credit to Colin Percival / Tarsnap for this optimization.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.mbstring">
   <title>MBString</title>

   <simpara>
    <function>mb_strcut</function> is much faster now for UTF-8
    and UTF-16 strings.
   </simpara>

   <simpara>
    Looking up mbstring encoding names is much faster now.
   </simpara>

   <simpara>
    The performance of converting SJIS-win to Unicode is greatly improved.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.mysqlnd">
   <title>MySQLnd</title>

   <simpara>
    Improved the performance of MySQLnd quoting.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.pcre">
   <title>PCRE</title>

   <simpara>
    Improved the performance of named capture groups.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.random">
   <title>Random</title>

   <simpara>
    Improved the performance of <classname>Random\Randomizer</classname>,
    with a specific focus on the
    <methodname>Random\Randomizer::getBytes</methodname>,
    and <methodname>Random\Randomizer::getBytesFromString</methodname> methods.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.simplexml">
   <title>SimpleXML</title>

   <simpara>
    Improved performance and reduce memory consumption of XML serialization.
   </simpara>
  </sect3>

  <sect3 xml:id="migration84.other-changes.performance.standard">
   <title>Standard</title>

   <simpara>
    The performance of <function>strspn</function> and
    <function>strcspn</function> is greatly improved.
    They now run in linear time instead of being bounded by quadratic time.
   </simpara>

   <simpara>
    Improved the performance of <function>strpbrk</function>.
   </simpara>

   <simpara>
    <function>get_browser</function> is much faster now,
    up to 1.5x - 2.5x for some test cases.
   </simpara>
  </sect3>
 </sect2>

</sect1>
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