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<para> <example> <title /> <programlisting> <![CDATA[ <?php echo "foo\n"; ?> ]]> </programlisting> <para> The output is: </para> <screen> <![CDATA[ foo ]]> </screen> </example> </para> git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@131857 c90b9560-bf6c-de11-be94-00142212c4b1
140 lines
3.5 KiB
XML
140 lines
3.5 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.9 $ -->
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<!-- splitted from ./en/functions/array.xml, last change in rev 1.2 -->
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<refentry id="function.array-merge">
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<refnamediv>
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<refname>array_merge</refname>
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<refpurpose>Merge two or more arrays</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_merge</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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</methodsynopsis>
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<para>
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<function>array_merge</function> merges the elements of two or
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more arrays together so that the values of one are appended to
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the end of the previous one. It returns the resulting array.
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</para>
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<para>
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If the input arrays have the same string keys, then the later value for
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that key will overwrite the previous one. If, however, the arrays
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contain numeric keys, the later value will <emphasis
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role="strong">not</emphasis> overwrite the original value, but will be
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appended.
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</para>
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<para>
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<example>
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<title><function>array_merge</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$array1 = array ("color" => "red", 2, 4);
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$array2 = array ("a", "b", "color" => "green", "shape" => "trapezoid", 4);
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$result = array_merge ($array1, $array2);
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print_r($result);
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?>
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]]>
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</programlisting>
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<para>
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The <varname>$result</varname> is:
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</para>
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<screen role="php">
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<![CDATA[
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Array
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(
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[color] => green
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[0] => 2
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[1] => 4
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[2] => a
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[3] => b
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[shape] => trapezoid
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[4] => 4
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)
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]]>
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</screen>
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</example>
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</para>
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<para>
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<example>
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<title>Simple <function>array_merge</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$array1 = array();
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$array2 = array(1 => "data");
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$result = array_merge($array1, $array2);
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?>
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]]>
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</programlisting>
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<para>
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Don't forget that numeric keys will be renumbered!
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</para>
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<screen role="php">
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<![CDATA[
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Array
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(
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[0] => data
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)
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]]>
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</screen>
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<para>
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If you want to completely preserve the arrays and just want to append
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them to each other, use the <literal>+</literal> operator:
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</para>
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<programlisting role="php">
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<![CDATA[
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<?php
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$array1 = array();
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$array2 = array(1 => "data");
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$result = $array1 + $array2;
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?>
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]]>
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</programlisting>
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<para>
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The numeric key will be preserved and thus the association remains.
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</para>
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<screen role="php">
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<![CDATA[
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Array
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(
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[1] => data
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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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<note>
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<para>
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Shared keys will be overwritten on a first-come first-served basis.
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</para>
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</note>
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<para>
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See also <function>array_merge_recursive</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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