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630ea17fa5
- made example actually output something git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@181529 c90b9560-bf6c-de11-be94-00142212c4b1
122 lines
4 KiB
XML
122 lines
4 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.7 $ -->
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<!-- splitted from ./en/functions/array.xml, last change in rev 1.14 -->
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<refentry id="function.array-diff-uassoc">
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<refnamediv>
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<refname>array_diff_uassoc</refname>
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<refpurpose>
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Computes the difference of arrays with additional index check
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which is performed by a user supplied callback function
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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>array</type><methodname>array_diff_uassoc</methodname>
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<methodparam><type>array</type><parameter>array1</parameter></methodparam>
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<methodparam><type>array</type><parameter>array2</parameter></methodparam>
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<methodparam choice="opt"><type>array</type><parameter>...</parameter></methodparam>
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<methodparam><type>callback</type><parameter>key_compare_func</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>array_diff_uassoc</function> returns an <type>array</type>
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containing all the values from <parameter>array1</parameter>
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that are not present in any of the other arguments.
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Note that the keys are used in the comparison unlike
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<function>array_diff</function>.
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</para>
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<para>
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This comparison is done by a user supplied callback function.
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It must return an integer less than, equal
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to, or greater than zero if the first argument is considered to
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be respectively less than, equal to, or greater than the
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second. This is unlike <function>array_diff_assoc</function> where an
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internal function for comparing the indices is used.
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</para>
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<para>
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<example>
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<title><function>array_diff_uassoc</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function key_compare_func($a, $b)
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{
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if ($a === $b) {
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return 0;
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}
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return ($a > $b)? 1:-1;
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}
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$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
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$array2 = array("a" => "green", "yellow", "red");
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$result = array_diff_uassoc($array1, $array2, "key_compare_func");
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print_r($result);
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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Array
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(
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[b] => brown
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[c] => blue
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[0] => red
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)
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]]>
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</screen>
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</example>
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</para>
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<simpara>
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In our example above you see the <literal>"a" => "green"</literal>
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pair is present in both arrays and thus it is not in the ouput from the
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function. Unlike this, the pair <literal>0 => "red"</literal>
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is in the ouput because in the second argument <literal>"red"</literal>
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has key which is <literal>1</literal>.
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</simpara>
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<simpara>
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The equality of 2 indices is checked by the user supplied callback function.
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</simpara>
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<note>
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<simpara>
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Please note that this function only checks one dimension of a n-dimensional
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array. Of course you can check deeper dimensions by using, for example,
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<literal>array_diff_uassoc($array1[0], $array2[0], "key_compare_func");</literal>.
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</simpara>
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</note>
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<para>
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See also
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<function>array_diff</function>,
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<function>array_diff_assoc</function>,
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<function>array_udiff</function>,
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<function>array_udiff_assoc</function>,
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<function>array_udiff_uassoc</function>,
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<function>array_intersect</function>,
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<function>array_intersect_assoc</function>,
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<function>array_uintersect</function>,
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<function>array_uintersect_assoc</function> and
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<function>array_uintersect_uassoc</function>.
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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:"../../../../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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