mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 05:26:57 +08:00
419 lines
13 KiB
HTML
419 lines
13 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
||
<title>Convert HTML entities to their corresponding characters</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.html-entity-decode" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">html_entity_decode</h1>
|
||
<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">html_entity_decode</span> — <span class="dc-title">Convert HTML entities to their corresponding characters</span></p>
|
||
|
||
</div>
|
||
|
||
<div class="refsect1 description" id="refsect1-function.html-entity-decode-description">
|
||
<h3 class="title">说明</h3>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>html_entity_decode</strong></span>
|
||
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$string</code></span>
|
||
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$flags</code><span class="initializer"> = ENT_COMPAT | ENT_HTML401</span></span>
|
||
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$encoding</code><span class="initializer"> = ini_get("default_charset")</span></span>
|
||
]] ) : <span class="type">string</span></div>
|
||
|
||
<p class="para rdfs-comment">
|
||
<span class="function"><strong>html_entity_decode()</strong></span> is the opposite of
|
||
<span class="function"><a href="htmlentities.html" class="function">htmlentities()</a></span> in that it converts HTML entities
|
||
in the <code class="parameter">string</code> to their corresponding characters.
|
||
</p>
|
||
<p class="para">
|
||
More precisely, this function decodes all the entities (including all numeric
|
||
entities) that a) are necessarily valid for the chosen document type — i.e.,
|
||
for XML, this function does not decode named entities that might be defined
|
||
in some DTD — and b) whose character or characters are in the coded character
|
||
set associated with the chosen encoding and are permitted in the chosen
|
||
document type. All other entities are left as is.
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 parameters" id="refsect1-function.html-entity-decode-parameters">
|
||
<h3 class="title">参数</h3>
|
||
<p class="para">
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">string</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
The input string.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">flags</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
A bitmask of one or more of the following flags, which specify how to handle quotes and
|
||
which document type to use. The default is <em>ENT_COMPAT | ENT_HTML401</em>.
|
||
<table class="doctable table">
|
||
<caption><strong>Available <code class="parameter">flags</code> constants</strong></caption>
|
||
|
||
<thead>
|
||
<tr>
|
||
<th>Constant Name</th>
|
||
<th>Description</th>
|
||
</tr>
|
||
|
||
</thead>
|
||
|
||
<tbody class="tbody">
|
||
<tr>
|
||
<td><strong><code>ENT_COMPAT</code></strong></td>
|
||
<td>Will convert double-quotes and leave single-quotes alone.</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td><strong><code>ENT_QUOTES</code></strong></td>
|
||
<td>Will convert both double and single quotes.</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td><strong><code>ENT_NOQUOTES</code></strong></td>
|
||
<td>Will leave both double and single quotes unconverted.</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td><strong><code>ENT_HTML401</code></strong></td>
|
||
<td>
|
||
Handle code as HTML 4.01.
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td><strong><code>ENT_XML1</code></strong></td>
|
||
<td>
|
||
Handle code as XML 1.
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td><strong><code>ENT_XHTML</code></strong></td>
|
||
<td>
|
||
Handle code as XHTML.
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td><strong><code>ENT_HTML5</code></strong></td>
|
||
<td>
|
||
Handle code as HTML 5.
|
||
</td>
|
||
</tr>
|
||
|
||
</tbody>
|
||
|
||
</table>
|
||
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">encoding</code></dt>
|
||
|
||
<dd>
|
||
|
||
|
||
<p class="para">
|
||
An optional argument defining the encoding used when converting characters.
|
||
</p>
|
||
|
||
<p class="para">
|
||
If omitted, the default value of the <code class="parameter">encoding</code> varies
|
||
depending on the PHP version in use. In PHP 5.6 and later, the
|
||
<a href="ini.core.html#ini.default-charset" class="link">default_charset</a> configuration
|
||
option is used as the default value. PHP 5.4 and 5.5 will use
|
||
<em>UTF-8</em> as the default. Earlier versions of PHP use
|
||
<em>ISO-8859-1</em>.
|
||
</p>
|
||
|
||
<p class="para">
|
||
Although this argument is technically optional, you are highly encouraged to
|
||
specify the correct value for your code if you are using PHP 5.5 or earlier,
|
||
or if your <a href="ini.core.html#ini.default-charset" class="link">default_charset</a>
|
||
configuration option may be set incorrectly for the given input.
|
||
</p>
|
||
|
||
|
||
|
||
|
||
<p class="para">
|
||
支持以下字符集：
|
||
<table class="doctable table">
|
||
<caption><strong>支持的字符集列表</strong></caption>
|
||
|
||
<thead>
|
||
<tr>
|
||
<th>字符集</th>
|
||
<th>别名</th>
|
||
<th>描述</th>
|
||
</tr>
|
||
|
||
</thead>
|
||
|
||
<tbody class="tbody">
|
||
<tr>
|
||
<td>ISO-8859-1</td>
|
||
<td>ISO8859-1</td>
|
||
<td>
|
||
西欧，Latin-1
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>ISO-8859-5</td>
|
||
<td>ISO8859-5</td>
|
||
<td>
|
||
Little used cyrillic charset (Latin/Cyrillic).
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>ISO-8859-15</td>
|
||
<td>ISO8859-15</td>
|
||
<td>
|
||
西欧，Latin-9。增加欧元符号，法语和芬兰语字母在 Latin-1(ISO-8859-1) 中缺失。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>UTF-8</td>
|
||
<td class="empty"> </td>
|
||
<td>
|
||
ASCII 兼容的多字节 8 位 Unicode。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>cp866</td>
|
||
<td>ibm866, 866</td>
|
||
<td>
|
||
DOS 特有的西里尔编码。本字符集在 4.3.2 版本中得到支持。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>cp1251</td>
|
||
<td>Windows-1251, win-1251, 1251</td>
|
||
<td>
|
||
Windows 特有的西里尔编码。本字符集在 4.3.2 版本中得到支持。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>cp1252</td>
|
||
<td>Windows-1252, 1252</td>
|
||
<td>
|
||
Windows 特有的西欧编码。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>KOI8-R</td>
|
||
<td>koi8-ru, koi8r</td>
|
||
<td>
|
||
俄语。本字符集在 4.3.2 版本中得到支持。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>BIG5</td>
|
||
<td>950</td>
|
||
<td>
|
||
繁体中文，主要用于中国台湾省。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>GB2312</td>
|
||
<td>936</td>
|
||
<td>
|
||
简体中文，中国国家标准字符集。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>BIG5-HKSCS</td>
|
||
<td class="empty"> </td>
|
||
<td>
|
||
繁体中文，附带香港扩展的 Big5 字符集。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>Shift_JIS</td>
|
||
<td>SJIS, 932</td>
|
||
<td>
|
||
日语
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>EUC-JP</td>
|
||
<td>EUCJP</td>
|
||
<td>
|
||
日语
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>MacRoman</td>
|
||
<td class="empty"> </td>
|
||
<td>
|
||
Mac OS 使用的字符串。
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td><em>''</em></td>
|
||
<td class="empty"> </td>
|
||
<td>
|
||
An empty string activates detection from script encoding (Zend multibyte),
|
||
<a href="ini.core.html#ini.default-charset" class="link">default_charset</a> and current
|
||
locale (see <span class="function"><a href="nl_langinfo.html" class="function">nl_langinfo()</a></span> and
|
||
<span class="function"><a href="setlocale.html" class="function">setlocale()</a></span>), in this order. Not recommended.
|
||
</td>
|
||
</tr>
|
||
|
||
</tbody>
|
||
|
||
</table>
|
||
|
||
<blockquote class="note"><p><strong class="note">Note</strong>:
|
||
<span class="simpara">
|
||
其他字符集没有认可。将会使用默认编码并抛出异常。
|
||
</span>
|
||
</p></blockquote>
|
||
</p>
|
||
|
||
|
||
</dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.html-entity-decode-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
Returns the decoded string.
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 changelog" id="refsect1-function.html-entity-decode-changelog">
|
||
<h3 class="title">更新日志</h3>
|
||
<p class="para">
|
||
<table class="doctable informaltable">
|
||
|
||
<thead>
|
||
<tr>
|
||
<th>版本</th>
|
||
<th>说明</th>
|
||
</tr>
|
||
|
||
</thead>
|
||
|
||
<tbody class="tbody">
|
||
|
||
<tr>
|
||
<td>5.6.0</td>
|
||
<td>
|
||
The default value for the <code class="parameter">encoding</code> parameter was
|
||
changed to be the value of the
|
||
<a href="ini.core.html#ini.default-charset" class="link">default_charset</a> configuration
|
||
option.
|
||
</td>
|
||
</tr>
|
||
|
||
|
||
<tr>
|
||
<td>5.4.0</td>
|
||
<td>
|
||
Default encoding changed from ISO-8859-1 to UTF-8.
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<td>5.4.0</td>
|
||
<td>
|
||
The constants <strong><code>ENT_HTML401</code></strong>, <strong><code>ENT_XML1</code></strong>,
|
||
<strong><code>ENT_XHTML</code></strong> and <strong><code>ENT_HTML5</code></strong> were added.
|
||
</td>
|
||
</tr>
|
||
|
||
</tbody>
|
||
|
||
</table>
|
||
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 examples" id="refsect1-function.html-entity-decode-examples">
|
||
<h3 class="title">范例</h3>
|
||
<p class="para">
|
||
<div class="example" id="example-5910">
|
||
<p><strong>Example #1 Decoding HTML entities</strong></p>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br />$orig </span><span style="color: #007700">= </span><span style="color: #DD0000">"I'll \"walk\" the <b>dog</b> now"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$a </span><span style="color: #007700">= </span><span style="color: #0000BB">htmlentities</span><span style="color: #007700">(</span><span style="color: #0000BB">$orig</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$b </span><span style="color: #007700">= </span><span style="color: #0000BB">html_entity_decode</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #0000BB">$a</span><span style="color: #007700">; </span><span style="color: #FF8000">// I'll &quot;walk&quot; the &lt;b&gt;dog&lt;/b&gt; now<br /><br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">$b</span><span style="color: #007700">; </span><span style="color: #FF8000">// I'll "walk" the <b>dog</b> now<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
</div>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 notes" id="refsect1-function.html-entity-decode-notes">
|
||
<h3 class="title">注释</h3>
|
||
<blockquote class="note"><p><strong class="note">Note</strong>:
|
||
<p class="para">
|
||
You might wonder why trim(html_entity_decode('&nbsp;')); doesn't
|
||
reduce the string to an empty string, that's because the '&nbsp;'
|
||
entity is not ASCII code 32 (which is stripped by
|
||
<span class="function"><a href="trim.html" class="function">trim()</a></span>) but ASCII code 160 (0xa0) in the default ISO
|
||
8859-1 encoding.
|
||
</p>
|
||
</p></blockquote>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 seealso" id="refsect1-function.html-entity-decode-seealso">
|
||
<h3 class="title">参见</h3>
|
||
<p class="para">
|
||
<ul class="simplelist">
|
||
<li class="member"><span class="function"><a href="htmlentities.html" class="function" rel="rdfs-seeAlso">htmlentities()</a> - 将字符转换为 HTML 转义字符</span></li>
|
||
<li class="member"><span class="function"><a href="htmlspecialchars.html" class="function" rel="rdfs-seeAlso">htmlspecialchars()</a> - 将特殊字符转换为 HTML 实体</span></li>
|
||
<li class="member"><span class="function"><a href="get_html_translation_table.html" class="function" rel="rdfs-seeAlso">get_html_translation_table()</a> - 返回使用 htmlspecialchars 和 htmlentities 后的转换表</span></li>
|
||
<li class="member"><span class="function"><a href="urldecode.html" class="function" rel="rdfs-seeAlso">urldecode()</a> - 解码已编码的 URL 字符串</span></li>
|
||
</ul>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
</div></div></div></body></html> |