php-doc-en/functions/gettext.xml

 <reference id="ref.gettext">
  <title>GNU Gettext</title>
  <titleabbrev>gettext</titleabbrev>

  <refentry id="function.bindtextdomain">
   <refnamediv>
    <refname>bindtextdomain</refname>
    <refpurpose>Sets the path for a domain</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <funcsynopsis>
     <funcdef>string <function>bindtextdomain</function></funcdef>
     <paramdef>string <parameter>domain</parameter></paramdef>
     <paramdef>string <parameter>directory</parameter></paramdef>
    </funcsynopsis>
    <para>
     The <function>bindtextdomain</function> function sets the path
     for a domain.
    </para>
   </refsect1>
  </refentry>
  <refentry id="function.dcgettext">
   <refnamediv>
    <refname>dcgettext</refname>
    <refpurpose>Overrides the domain for a single lookup</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <funcsynopsis>
     <funcdef>string <function>dcgettext</function></funcdef>
     <paramdef>string <parameter>domain</parameter></paramdef>
     <paramdef>string <parameter>message</parameter></paramdef>
     <paramdef>int <parameter>category</parameter></paramdef>
    </funcsynopsis>
    <para>
     This function allows you to override the current domain for a
     single message lookup. It also allows you to specify a category.
    </para>
   </refsect1>
  </refentry>

  <refentry id="function.dgettext">
   <refnamediv>
    <refname>dgettext</refname>
    <refpurpose>Override the current domain</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <funcsynopsis>
     <funcdef>string <function>dgettext</function></funcdef>
     <paramdef>string <parameter>domain</parameter></paramdef>
     <paramdef>string <parameter>message</parameter></paramdef>
    </funcsynopsis>
    <para>
     The <function>dgettext</function> function allows you to override
     the current domain for a single message lookup.
    </para>
   </refsect1>
  </refentry>
  <refentry id="function.gettext">
   <refnamediv>
    <refname>gettext</refname>
    <refpurpose>Lookup a message in the current domain</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <funcsynopsis>
     <funcdef>string <function>gettext</function></funcdef>
     <paramdef>string <parameter>message</parameter></paramdef>
    </funcsynopsis>
    <para>
     This function returns a translated string if one is found in the
     translation table, or the submitted message if not found. You may
     use an underscore character as an alias to this function.
    </para>
    <example>
     <title><function>Gettext</function>-check</title>
     <programlisting>
&lt;?php
// Set language to German
putenv ("LANG=de");

// Specify location of translation tables
bindtextdomain ("myPHPApp", "./locale");

// Choose domain
textdomain ("myPHPApp");

// Print a test message
print (gettext ("Welcome to My PHP Application"));
?>
     </programlisting>
    </example>
   </refsect1>
  </refentry>
  <refentry id="function.textdomain">
   <refnamediv>
    <refname>textdomain</refname>
    <refpurpose>Sets the default domain</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <funcsynopsis>
     <funcdef>int <function>textdomain</function></funcdef>
     <paramdef>string 
      <parameter><optional>library</optional></parameter>
     </paramdef>
    </funcsynopsis>
    <para>
     This function sets the domain to search within when calls are
     made to <function>gettext</function>, usually the named after an
     application.  The previous default domain is returned.  Call it
     with no parameters to get the current setting without changing
     it.
    </para>
   </refsect1>
  </refentry>
 </reference>

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