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<h2 class="title">Installation</h2>
<p class="para">
<em>mbstring</em> is a non-default extension. This means it
is not enabled by default. You must explicitly enable the module with
the <em>configure</em> option. See the
<a href="install.html" class="link">Install</a> section for details.
</p>
<p class="simpara">
The following configure options are related to the
<em>mbstring</em> module.
</p>
<p class="para">
<ul class="itemizedlist">
<li class="listitem">
<p class="para">
<strong class="option configure">--enable-mbstring</strong>
: Enable
<em>mbstring</em> functions. This option is
required to use <em>mbstring</em> functions.
</p>
<p class="para">
<span class="productname">libmbfl</span> is necesarry for <em>mbstring</em>.
<span class="productname">libmbfl</span> is bundled with <em>mbstring</em>.
If <span class="productname">libmbfl</span> is already installed on the system,
<strong class="option configure">--with-libmbfl[=DIR]</strong>
can be specified to use
the installed library.
</p>
<p class="para">
As of PHP 4.3.0, <em>mbstring</em> extension provides
enhanced support for Simplified Chinese, Traditional Chinese,
Korean, and Russian in addition to Japanese.
</p>
<p class="para">
For PHP 4.3.3 or before,
To enable that feature, you will have to supply either one of the
following options to the <em>LANG</em> parameter
of <strong class="option configure">--enable-mbstring=LANG</strong>
;
<strong class="option configure">--enable-mbstring=cn</strong>
for Simplified Chinese support,
<strong class="option configure">--enable-mbstring=tw</strong>
for Traditional Chinese support,
<strong class="option configure">--enable-mbstring=kr</strong>
for Korean support,
<strong class="option configure">--enable-mbstring=ru</strong>
for Russian support, and
<strong class="option configure">--enable-mbstring=ja</strong>
for Japanese support (default).
To enable all supported encoding, use <strong class="option configure">--enable-mbstring=all</strong>
.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
As of PHP 4.3.4,
all supported encoding by <span class="productname">libmbfl</span> is enabled
with <strong class="option configure">--enable-mbstring</strong>
.
</p>
</p></blockquote>
</li>
<li class="listitem">
<p class="para">
<strong class="option configure">--enable-mbstr-enc-trans</strong>
:
Enable HTTP input character encoding conversion using
<em>mbstring</em> conversion engine. If this
feature is enabled, HTTP input character encoding may be
converted to <em>mbstring.internal_encoding</em>
automatically.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
As of PHP 4.3.0, the option
<strong class="option configure">--enable-mbstr-enc-trans</strong>
was eliminated and replaced with the runtime setting
<em>mbstring.encoding_translation</em>.
HTTP input character encoding conversion is enabled
when this is set to <em>On</em>
(the default is <em>Off</em>).
</p>
</p></blockquote>
</li>
<li class="listitem">
<p class="para">
<strong class="option configure">--disable-mbregex</strong>
: Disable
regular expression functions with multibyte character support.
</p>
</li>
</ul>
</p>
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