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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@153654 c90b9560-bf6c-de11-be94-00142212c4b1
134 lines
4 KiB
XML
134 lines
4 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/strings.xml, last change in rev 1.2 -->
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<refentry id="function.html-entity-decode">
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<refnamediv>
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<refname>html_entity_decode</refname>
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<refpurpose>
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Convert all HTML entities to their applicable characters
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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>string</type><methodname>html_entity_decode</methodname>
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<methodparam><type>string</type><parameter>string</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>quote_style</parameter></methodparam>
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<methodparam choice="opt"><type>string</type><parameter>charset</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>html_entity_decode</function> is the opposite of
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<function>htmlentities</function> in that it converts all HTML entities
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to their applicable characters from <parameter>string</parameter>.
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</para>
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<para>
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The optional second <parameter>quote_style</parameter> parameter lets
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you define what will be done with 'single' and "double" quotes. It takes
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on one of three constants with the default being
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<constant>ENT_COMPAT</constant>:
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<table>
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<title>Available <parameter>quote_style</parameter> constants</title>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>Constant Name</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><constant>ENT_COMPAT</constant></entry>
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<entry>Will convert double-quotes and leave single-quotes alone.</entry>
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</row>
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<row>
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<entry><constant>ENT_QUOTES</constant></entry>
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<entry>Will convert both double and single quotes.</entry>
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</row>
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<row>
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<entry><constant>ENT_NOQUOTES</constant></entry>
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<entry>Will leave both double and single quotes unconverted.</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</para>
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<para>
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The ISO-8859-1 character set is used as default for the optional third
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<parameter>charset</parameter>. This defines the character set used in
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conversion.
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</para>
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&reference.strings.charsets;
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<para>
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<example>
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<title>Decoding HTML entities</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$orig = "I'll \"walk\" the <b>dog</b> now";
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$a = htmlentities($orig);
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$b = html_entity_decode($a);
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echo $a; // I'll "walk" the <b>dog</b> now
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echo $b; // I'll "walk" the <b>dog</b> now
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// For users prior to PHP 4.3.0 you may do this:
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function unhtmlentities($string)
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{
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$trans_tbl = get_html_translation_table(HTML_ENTITIES);
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$trans_tbl = array_flip($trans_tbl);
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return strtr($string, $trans_tbl);
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}
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$c = unhtmlentities($a);
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echo $c; // I'll "walk" the <b>dog</b> now
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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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<note>
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<para>
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You might wonder why trim(html_entity_decode('&nbsp;')); doesn't
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reduce the string to an empty string, that's because the '&nbsp;'
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entity is not ASCII code 32 (which is stripped by
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<function>trim</function>) but ASCII code 160 (0xa0) in the default ISO
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8859-1 characterset.
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</para>
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</note>
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</para>
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<para>
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See also <function>htmlentities</function>,
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<function>htmlspecialchars</function>,
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<function>get_html_translation_table</function>,
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and <function>urldecode</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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