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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@83536 c90b9560-bf6c-de11-be94-00142212c4b1
106 lines
3.1 KiB
XML
106 lines
3.1 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.3 $ -->
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<!-- splitted from ./en/functions/strings.xml, last change in rev 1.38 -->
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<refentry id="function.strnatcmp">
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<refnamediv>
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<refname>strnatcmp</refname>
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<refpurpose>
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String comparisons using a "natural order" algorithm
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</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>strnatcmp</methodname>
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<methodparam><type>string</type><parameter>str1</parameter></methodparam>
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<methodparam><type>string</type><parameter>str2</parameter></methodparam>
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</methodsynopsis>
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<para>
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This function implements a comparison algorithm that orders
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alphanumeric strings in the way a human being would, this is
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described as a "natural ordering". An example of the difference
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between this algorithm and the regular computer string sorting
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algorithms (used in <function>strcmp</function>) can be seen
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below:
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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$arr1 = $arr2 = array("img12.png","img10.png","img2.png","img1.png");
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echo "Standard string comparison\n";
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usort($arr1,"strcmp");
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print_r($arr1);
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echo "\nNatural order string comparison\n";
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usort($arr2,"strnatcmp");
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print_r($arr2);
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]]>
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</programlisting>
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</informalexample>
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The code above will generate the following output:
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<informalexample>
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<screen>
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<![CDATA[
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Standard string comparison
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Array
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(
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[0] => img1.png
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[1] => img10.png
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[2] => img12.png
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[3] => img2.png
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)
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Natural order string comparison
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Array
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(
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[0] => img1.png
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[1] => img2.png
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[2] => img10.png
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[3] => img12.png
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)
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]]>
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</screen>
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</informalexample>
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For more information see: Martin Pool's <ulink
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url="&url.strnatcmp;">Natural Order String Comparison</ulink>
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page.
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</para>
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<simpara>
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Similar to other string comparison functions, this one returns
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< 0 if <parameter>str1</parameter> is less than
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<parameter>str2</parameter>; > 0 if
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<parameter>str1</parameter> is greater than
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<parameter>str2</parameter>, and 0 if they are equal.
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</simpara>
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<simpara>
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Note that this comparison is case sensitive.
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</simpara>
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<simpara>
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See also <function>ereg</function>,
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<function>strcasecmp</function>, <function>substr</function>,
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<function>stristr</function>, <function>strcmp</function>,
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<function>strncmp</function>, <function>strncasecmp</function>,
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<function>strnatcasecmp</function>, <function>strstr</function>,
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<function>natsort</function> and <function>natcasesort</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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