php-doc-en/reference/math/functions/hexdec.xml
Sean Coates 83304a07f6 grammar
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@166707 c90b9560-bf6c-de11-be94-00142212c4b1
2004-08-18 16:18:48 +00:00

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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.9 $ -->
<!-- splitted from ./en/functions/math.xml, last change in rev 1.16 -->
<refentry id="function.hexdec">
<refnamediv>
<refname>hexdec</refname>
<refpurpose>Hexadecimal to decimal</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>number</type><methodname>hexdec</methodname>
<methodparam><type>string</type><parameter>hex_string</parameter></methodparam>
</methodsynopsis>
<para>
Returns the decimal equivalent of the hexadecimal number
represented by the <parameter>hex_string</parameter> argument.
<function>hexdec</function> converts a hexadecimal string to a
decimal number. The largest number that can be converted is
7fffffff or 2147483647 in decimal.
As of PHP 4.1.0, this function can also convert larger numbers. It returns
<type>float</type> in that case.
</para>
<para>
<function>hexdec</function> will ignore any non-hexadecimal
characters it encounters.
<example>
<title><function>hexdec</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
var_dump(hexdec("See"));
var_dump(hexdec("ee"));
// both print "int(238)"
var_dump(hexdec("that")); // print "int(10)"
var_dump(hexdec("a0")); // print "int(160)"
?>
]]>
</programlisting>
</example>
</para>
<para>
See also <function>dechex</function>,
<function>bindec</function>,
<function>octdec</function> and
<function>base_convert</function>.
</para>
</refsect1>
</refentry>
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