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https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@181877 c90b9560-bf6c-de11-be94-00142212c4b1
96 lines
2.6 KiB
XML
96 lines
2.6 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.15 $ -->
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<!-- splitted from ./en/functions/math.xml, last change in rev 1.2 -->
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<refentry id="function.rand">
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<refnamediv>
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<refname>rand</refname>
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<refpurpose>Generate a random integer</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>int</type><methodname>rand</methodname>
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<methodparam choice="opt"><type>int</type><parameter>min</parameter></methodparam>
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<methodparam><type>int</type><parameter>max</parameter></methodparam>
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</methodsynopsis>
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<simpara>
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If called without the optional <parameter>min</parameter>,
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<parameter>max</parameter> arguments <function>rand</function>
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returns a pseudo-random integer between 0 and
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<constant>RAND_MAX</constant>. If you want a random number
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between 5 and 15 (inclusive), for example, use <literal>rand (5,
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15)</literal>.
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</simpara>
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<para>
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<example>
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<title><function>rand</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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echo rand() . "\n";
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echo rand() . "\n";
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echo rand(5, 15);
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?>
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]]>
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</programlisting>
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&example.outputs.similar;
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<screen>
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<![CDATA[
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7771
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22264
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11
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]]>
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</screen>
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</example>
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</para>
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<note>
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<simpara>
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On some platforms (such as Windows) <constant>RAND_MAX</constant>
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is only 32768. If you require a range larger than 32768, specifying
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<parameter>min</parameter> and <parameter>max</parameter> will allow
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you to create a range larger than RAND_MAX, or consider using
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<function>mt_rand</function> instead.
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</simpara>
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</note>
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¬e.randomseed;
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<note>
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<para>
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In versions before 3.0.7 the meaning of
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<parameter>max</parameter> was <parameter>range</parameter>. To
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get the same results in these versions the short example should
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be <literal>rand (5, 11)</literal> to get a random number
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between 5 and 15.
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</para>
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</note>
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<simpara>
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See also:
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<function>srand</function>,
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<function>getrandmax</function>, and
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<function>mt_rand</function>.
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</simpara>
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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:"../../../../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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