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130 lines
3.3 KiB
XML
130 lines
3.3 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 7973fd533364af4dd6282ca9e7bee2dffec39b1c Maintainer: yannick Status: ready -->
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<!-- Reviewed: yes -->
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<refentry xml:id="function.srand" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>srand</refname>
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<refpurpose>Initialise le générateur de nombres aléatoires</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>void</type><methodname>srand</methodname>
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<methodparam choice="opt"><type>int</type><parameter>seed</parameter><initializer>0</initializer></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>mode</parameter><initializer><constant>MT_RAND_MT19937</constant></initializer></methodparam>
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</methodsynopsis>
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<para>
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<function>srand</function> initialise le générateur de
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nombres aléatoires avec <parameter>seed</parameter>,
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ou avec une valeur aléatoire si <parameter>seed</parameter> est
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<literal>0</literal>.
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</para>
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¬e.randomseed;
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<note><simpara>
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Depuis PHP 7.1.0, <function>srand</function> est un alias de <function>mt_srand</function>.
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</simpara>
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</note>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>seed</parameter></term>
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<listitem>
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<para>
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Un <type>int</type> d'initialisation arbitraire
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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&return.void;
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<para>
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>7.1.0</entry>
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<entry>
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<function>srand</function> <link linkend="migration71.incompatible.rand-srand-aliases">est devenu</link> un alias de <function>mt_srand</function>.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title>Exemple avec <function>srand</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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// initialise avec les microsecondes
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function make_seed()
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{
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list($usec, $sec) = explode(' ', microtime());
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return $sec + $usec * 1000000;
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}
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srand(make_seed());
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$randval = rand();
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>rand</function></member>
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<member><function>getrandmax</function></member>
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<member><function>mt_srand</function></member>
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</simplelist>
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</para>
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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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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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