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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>The Normalizer class</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="locale.setdefault.html">Locale::setDefault</a></div> <div class="next" style="text-align: right; float: right;"><a href="normalizer.isnormalized.html">Normalizer::isNormalized</a></div> <div class="up"><a href="book.intl.html">intl</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div> <h1 class="title">The Normalizer class</h1> <div class="partintro"> <div id="normalizer.intro" class="section"> <h2 class="title">Introduction</h2> <p class="simpara"> Normalization is a process that involves transforming characters and sequences of characters into a formally-defined underlying representation. This process is most important when text needs to be compared for sorting and searching, but it is also used when storing text to ensure that the text is stored in a consistent representation. </p> <p class="para"> The Unicode Consortium has defined a number of normalization forms reflecting the various needs of applications: <ul class="simplelist"> <li class="member">Normalization Form D (NFD) - Canonical Decomposition</li> <li class="member"> Normalization Form C (NFC) - Canonical Decomposition followed by Canonical Composition </li> <li class="member"> Normalization Form KD (NFKD) - Compatibility Decomposition </li> <li class="member"> Normalization Form KC (NFKC) - Compatibility Decomposition followed by Canonical Composition </li> </ul> The different forms are defined in terms of a set of transformations on the text, transformations that are expressed by both an algorithm and a set of data files. </p> </div> <div id="normalizer.synopsis" class="section"> <h2 class="title">Class synopsis</h2> <div class="classsynopsis"> <div class="ooclass"> <b class="classname">Normalizer</b> </div> <div class="classsynopsisinfo"> <span class="ooclass"> <b class="classname">Normalizer</b> </span> {</div> <div class="classsynopsisinfo classsynopsisinfo_comment">/* Methods */</div> <div class="methodsynopsis dc-description"> <span class="modifier">static</span> <span class="type">boolean</span> <span class="methodname"><b><a href="normalizer.isnormalized.html" class="function">Normalizer::isNormalized</a></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$input</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$form</tt></span> ] )</div><div class="methodsynopsis dc-description"> <span class="modifier">static</span> <span class="type">string</span> <span class="methodname"><b><a href="normalizer.normalize.html" class="function">Normalizer::normalize</a></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$input</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$form</tt></span> ] )</div> }</div> </div> <div id="intl.normalizer-constants" class="section"> <h2 class="title">Predefined Constants</h2> <p class="para"> The following constants define the normalization form used by the normalizer: <dl> <dt> <span class="term"> <b><tt>Normalizer::FORM_C</tt></b> (<a href="language.types.string.html" class="type string">string</a>) </span> <dd> <span class="simpara"> Normalization Form C (NFC) - Canonical Decomposition followed by Canonical Composition </span> </dd> </dt> <dt> <span class="term"> <b><tt>Normalizer::FORM_D</tt></b> (<a href="language.types.string.html" class="type string">string</a>) </span> <dd> <span class="simpara">Normalization Form D (NFD) - Canonical Decomposition</span> </dd> </dt> <dt> <span class="term"> <b><tt>Normalizer::FORM_KC</tt></b> (<a href="language.types.string.html" class="type string">string</a>) </span> <dd> <span class="simpara"> Normalization Form KC (NFKC) - Compatibility Decomposition, followed by Canonical Composition </span> </dd> </dt> <dt> <span class="term"> <b><tt>Normalizer::FORM_KD</tt></b> (<a href="language.types.string.html" class="type string">string</a>) </span> <dd> <span class="simpara"> Normalization Form KD (NFKD) - Compatibility Decomposition </span> </dd> </dt> <dt> <span class="term"> <b><tt>Normalizer::NONE</tt></b> (<a href="language.types.string.html" class="type string">string</a>) </span> <dd> <span class="simpara">No decomposition/composition</span> </dd> </dt> <dt> <span class="term"> <b><tt>Normalizer::OPTION_DEFAULT</tt></b> (<a href="language.types.string.html" class="type string">string</a>) </span> <dd> <span class="simpara">Default normalization options</span> </dd> </dt> </dl> </p></div> <div id="normalizer.seealso" class="section"> <h2 class="title">See Also</h2> <p class="para"> <ul class="simplelist"> <li class="member"> <a href="http://unicode.org/reports/tr15/" class="link external">» Unicode Normalization </a> </li> <li class="member"> <a href="http://unicode.org/faq/normalization.html" class="link external">» Unicode Normalization FAQ </a> </li> <li class="member"> <a href="http://www.icu-project.org/userguide/normalization.html" class="link external">» ICU User Guide - Normalization </a> </li> <li class="member"> <a href="http://www.icu-project.org/apiref/icu4c/unorm_8h.html" class="link external">» ICU API Reference - Normalization </a> </li> </ul> </p> </div> </div> <h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="normalizer.isnormalized.html">Normalizer::isNormalized</a> 鈥⌨️ 快捷键说明
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