mirror of
https://github.com/sigmasternchen/php-doc-en
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247d016f43
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@336046 c90b9560-bf6c-de11-be94-00142212c4b1
85 lines
2.1 KiB
XML
85 lines
2.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.mt-getrandmax" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>mt_getrandmax</refname>
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<refpurpose>Show largest possible random value</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>int</type><methodname>mt_getrandmax</methodname>
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<void/>
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</methodsynopsis>
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<simpara>
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Returns the maximum value that can be returned by a call to
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<function>mt_rand</function>.
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</simpara>
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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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Returns the maximum random value returned by a call to
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<function>mt_rand</function> without arguments, which is the maximum value
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that can be used for its <parameter>max</parameter> parameter without the
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result being scaled up (and therefore less random).
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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><title>Calculate a random floating-point number</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function randomFloat($min = 0, $max = 1) {
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return $min + mt_rand() / mt_getrandmax() * ($max - $min);
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}
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var_dump(randomFloat());
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var_dump(randomFloat(2, 20));
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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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float(0.91601131712832)
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float(16.511210331931)
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]]>
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</screen>
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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>mt_rand</function></member>
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<member><function>mt_srand</function></member>
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<member><function>getrandmax</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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