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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
96 lines
2.5 KiB
XML
96 lines
2.5 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 1.107 -->
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<refentry id="function.array-flip">
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<refnamediv>
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<refname>array_flip</refname>
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<refpurpose>Exchanges all keys with their associated values in an array</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_flip</methodname>
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<methodparam><type>array</type><parameter>trans</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>array_flip</function> returns an <type>array</type> in flip
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order, i.e. keys from <parameter>trans</parameter> become values and values
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from <parameter>trans</parameter> become keys.
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</para>
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<para>
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Note that the values of <parameter>trans</parameter> need to be valid
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keys, i.e. they need to be either <type>integer</type> or
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<type>string</type>. A warning will be emitted if a value has the wrong
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type, and the key/value pair in question <emphasis>will not be
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flipped</emphasis>.
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</para>
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<para>
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If a value has several occurrences, the latest key will be
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used as its values, and all others will be lost.
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</para>
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<para>
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<function>array_flip</function> returns &false;
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if it fails.
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</para>
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<para>
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<example>
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<title><function>array_flip</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$trans = array_flip ($trans);
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$original = strtr ($str, $trans);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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<example>
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<title><function>array_flip</function> example : collision</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$trans = array ("a" => 1, "b" => 1, "c" => 2);
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$trans = array_flip ($trans);
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print_r($trans);
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?>
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]]>
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</programlisting>
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<para>
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now <varname>$trans</varname> is:
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</para>
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<screen>
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<![CDATA[
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Array
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(
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[1] => b
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[2] => c
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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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</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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