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#please check the other translations git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@95937 c90b9560-bf6c-de11-be94-00142212c4b1
102 lines
2.7 KiB
XML
102 lines
2.7 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/var.xml, last change in rev 1.5 -->
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<refentry id="function.print-r">
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<refnamediv>
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<refname>print_r</refname>
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<refpurpose>
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Prints human-readable information about a variable
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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>bool</type><methodname>print_r</methodname>
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<methodparam><type>mixed</type><parameter>expression</parameter></methodparam>
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</methodsynopsis>
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<simpara>
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<function>print_r</function> displays information about a variable
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in a way that's readable by humans. If given a <type>string</type>,
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<type>integer</type> or <type>float</type>, the value itself will be
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printed. If given an <type>array</type>,
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values will be presented in a format that shows keys and
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elements. Similar notation is used for <type>object</type>s.
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</simpara>
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<simpara>
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Remember that <function>print_r</function> will move the array
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pointer to the end. Use <function>reset</function> to bring
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it back to beginning.
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</simpara>
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&tip.ob-capture;
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<para>
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<informalexample>
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<programlisting role="php">
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<![CDATA[
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<pre>
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<?php
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$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x','y','z'));
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print_r ($a);
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?>
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</pre>
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]]>
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</programlisting>
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</informalexample>
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</para>
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<para>
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Which will output:
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<screen>
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<![CDATA[
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<pre>
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Array
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(
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[a] => apple
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[b] => banana
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[c] => Array
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(
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[0] => x
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[1] => y
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[2] => z
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)
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)
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</pre>
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]]>
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</screen>
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</para>
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<note>
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<simpara>
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Prior to PHP 4.0.4, <function>print_r</function> will continue forever
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if given an <type>array</type> or <type>object</type> that
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contains a direct or indirect reference to itself. An example
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is <literal>print_r($GLOBALS)</literal> because
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<literal>$GLOBALS</literal> is itself a global variable that
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contains a reference to itself.
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</simpara>
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</note>
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<simpara>
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See also <function>ob_start</function>, <function>var_dump</function>,
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and <function>var_export</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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