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@@ -23,61 +23,29 @@

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<para>

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<productname>libmbfl</productname> is necessary for <literal>mbstring</literal>.

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<productname>libmbfl</productname> is bundled with <literal>mbstring</literal>.

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If <productname>libmbfl</productname> is already installed on the system,

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Prior to PHP 7.3.0, if <productname>libmbfl</productname> is already installed on the system,

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<option role="configure">--with-libmbfl[=DIR]</option> can be specified to use

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the installed library.

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</para>

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<para>

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As of PHP 4.3.0, <literal>mbstring</literal> extension provides

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enhanced support for Simplified Chinese, Traditional Chinese,

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Korean, and Russian in addition to Japanese.

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</para>

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<para>

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For PHP 4.3.3 or before,

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To enable that feature, you will have to supply either one of the

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following options to the <literal>LANG</literal> parameter

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of <option role="configure">--enable-mbstring=LANG</option>;

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<option role="configure">--enable-mbstring=cn</option> for Simplified Chinese support,

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<option role="configure">--enable-mbstring=tw</option> for Traditional Chinese support,

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<option role="configure">--enable-mbstring=kr</option> for Korean support,

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<option role="configure">--enable-mbstring=ru</option> for Russian support, and

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<option role="configure">--enable-mbstring=ja</option> for Japanese support (default).

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To enable all supported encoding, use <option role="configure">--enable-mbstring=all</option>.

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</para>

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<note>

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<para>

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As of PHP 4.3.4,

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all supported encoding by <productname>libmbfl</productname> is enabled

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with <option role="configure">--enable-mbstring</option>.

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</para>

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</note>

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</listitem>

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<listitem>

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<para>

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<option role="configure">--enable-mbstr-enc-trans</option> :

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Enable HTTP input character encoding conversion using

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<literal>mbstring</literal> conversion engine. If this

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feature is enabled, HTTP input character encoding may be

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converted to <literal>mbstring.internal_encoding</literal>

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automatically.

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</para>

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<note>

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<para>

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As of PHP 4.3.0, the option

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<option role="configure">--enable-mbstr-enc-trans</option>

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was eliminated and replaced with the runtime setting

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<literal>mbstring.encoding_translation</literal>.

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HTTP input character encoding conversion is enabled

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when this is set to <literal>On</literal>

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(the default is <literal>Off</literal>).

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</para>

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</note>

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</listitem>

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<listitem>

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<para>

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<option role="configure">--disable-mbregex</option>: Disable

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regular expression functions with multibyte character support.

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</para>

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<para>

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<productname>Oniguruma</productname> is necessary for the regular

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expression functions with multibyte character support.

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As of PHP 7.4.0, pkg-config is used to detect the libonig library.

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Prior to PHP 7.4.0, <productname>Oniguruma</productname> was bundled with

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<literal>mbstring</literal>, but it was possible to build against an already

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installed libonig by passing <option role="configure">--with-onig[=DIR]</option>.

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</para>

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<para>

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It is possible to disable the multibyte regex backtrack

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check by specifying <option

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role="configure">--disable-mbregex-backtrack</option>.

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</para>

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</listitem>

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</itemizedlist>

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</para>

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