php-doc-en/reference/strings/functions/get-html-translation-table.xml

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<refentry xml:id="function.get-html-translation-table" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>get_html_translation_table</refname>
  <refpurpose>Returns the translation table used by <function>htmlspecialchars</function> and <function>htmlentities</function></refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>array</type><methodname>get_html_translation_table</methodname>
   <methodparam choice="opt"><type>int</type><parameter>table</parameter><initializer><constant>HTML_SPECIALCHARS</constant></initializer></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>flags</parameter><initializer><constant>ENT_QUOTES</constant> | <constant>ENT_SUBSTITUTE</constant> | <constant>ENT_HTML401</constant></initializer></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>encoding</parameter><initializer>"UTF-8"</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>get_html_translation_table</function> will return the
   translation table that is used internally for
   <function>htmlspecialchars</function> and
   <function>htmlentities</function>.
  </para>
  <note>
   <para>
    Special characters can be encoded in several ways. E.g.
    <literal>"</literal> can be encoded as <literal>&amp;quot;</literal>,
    <literal>&amp;#34;</literal> or <literal>&amp;#x22</literal>.
    <function>get_html_translation_table</function> returns only the form used
    by <function>htmlspecialchars</function> and
    <function>htmlentities</function>.
   </para>
  </note>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>table</parameter></term>
     <listitem>
      <para>
       Which table to return. Either <constant>HTML_ENTITIES</constant> or
       <constant>HTML_SPECIALCHARS</constant>.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>flags</parameter></term>
     <listitem>
      <para>
       A bitmask of one or more of the following flags, which specify which quotes the
       table will contain as well as which document type the table is for. The default is
       <literal>ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401</literal>.
       <table>
        <title>Available <parameter>flags</parameter> constants</title>
        <tgroup cols="2">
         <thead>
          <row>
           <entry>Constant Name</entry>
           <entry>Description</entry>
          </row>
         </thead>
         <tbody>
          <row>
           <entry><constant>ENT_COMPAT</constant></entry>
           <entry>Table will contain entities for double-quotes, but not for single-quotes.</entry>
          </row>
          <row>
           <entry><constant>ENT_QUOTES</constant></entry>
           <entry>Table will contain entities for both double and single quotes.</entry>
          </row>
          <row>
           <entry><constant>ENT_NOQUOTES</constant></entry>
           <entry>Table will neither contain entities for single quotes nor for double quotes.</entry>
          </row>
          <row>
           <entry><constant>ENT_SUBSTITUTE</constant></entry>
           <entry>
            Replace invalid code unit sequences with a Unicode Replacement Character
            U+FFFD (UTF-8) or &amp;#xFFFD; (otherwise) instead of returning an empty string.
           </entry>
          </row>
          <row>
           <entry><constant>ENT_HTML401</constant></entry>
           <entry>Table for HTML 4.01.</entry>
          </row>
          <row>
           <entry><constant>ENT_XML1</constant></entry>
           <entry>Table for XML 1.</entry>
          </row>
          <row>
           <entry><constant>ENT_XHTML</constant></entry>
           <entry>Table for XHTML.</entry>
          </row>
          <row>
           <entry><constant>ENT_HTML5</constant></entry>
           <entry>Table for HTML 5.</entry>
          </row>
         </tbody>
        </tgroup>
       </table>
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>encoding</parameter></term>
     <listitem>
      <para>
       Encoding to use.
       If omitted, the default value for this argument is UTF-8.
      </para>
      &reference.strings.charsets;
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the translation table as an array, with the original characters
   as keys and entities as values.
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>8.1.0</entry>
      <entry>
       <parameter>flags</parameter> changed from <constant>ENT_COMPAT</constant> to <constant>ENT_QUOTES</constant> | <constant>ENT_SUBSTITUTE</constant> | <constant>ENT_HTML401</constant>.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Translation Table Example</title>
    <programlisting role="php">
<![CDATA[
<?php
var_dump(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES | ENT_HTML5));
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
array(1510) {
  ["
"]=>
  string(9) "&NewLine;"
  ["!"]=>
  string(6) "&excl;"
  ["""]=>
  string(6) "&quot;"
  ["#"]=>
  string(5) "&num;"
  ["$"]=>
  string(8) "&dollar;"
  ["%"]=>
  string(8) "&percnt;"
  ["&"]=>
  string(5) "&amp;"
  ["'"]=>
  string(6) "&apos;"
  // ...
}
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>htmlspecialchars</function></member>
    <member><function>htmlentities</function></member>
    <member><function>html_entity_decode</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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