mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 05:26:57 +08:00
150 lines
6.8 KiB
HTML
150 lines
6.8 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>Defines a set of constants for retrieval and mass-definition</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.apc-define-constants" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">apc_define_constants</h1>
|
||
<p class="verinfo">(PECL apc >= 3.0.0)</p><p class="refpurpose"><span class="refname">apc_define_constants</span> — <span class="dc-title">
|
||
Defines a set of constants for retrieval and mass-definition
|
||
</span></p>
|
||
|
||
</div>
|
||
<div class="refsect1 description" id="refsect1-function.apc-define-constants-description">
|
||
<h3 class="title">说明</h3>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>apc_define_constants</strong></span>
|
||
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$key</code></span>
|
||
, <span class="methodparam"><span class="type">array</span> <code class="parameter">$constants</code></span>
|
||
[, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$case_sensitive</code><span class="initializer"> = <strong><code>TRUE</code></strong></span></span>
|
||
] ) : <span class="type">bool</span></div>
|
||
|
||
|
||
<p class="para rdfs-comment">
|
||
<span class="function"><a href="define.html" class="function">define()</a></span> is notoriously slow. Since the main benefit of
|
||
APC is to increase the performance of scripts/applications, this mechanism
|
||
is provided to streamline the process of mass constant definition. However,
|
||
this function does not perform as well as anticipated.
|
||
</p>
|
||
|
||
<p class="para">
|
||
For a better-performing solution, try the
|
||
<a href="http://pecl.php.net/package/hidef" class="link external">» hidef</a> extension from PECL.
|
||
</p>
|
||
|
||
<blockquote class="note"><p><strong class="note">Note</strong>:
|
||
<span class="simpara">
|
||
To remove a set of stored constants (without clearing the entire cache), an
|
||
empty array may be passed as the <code class="parameter">constants</code>
|
||
parameter, effectively clearing the stored value(s).
|
||
</span>
|
||
</p></blockquote>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 parameters" id="refsect1-function.apc-define-constants-parameters">
|
||
<h3 class="title">参数</h3>
|
||
<p class="para">
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">key</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
The <code class="parameter">key</code> serves as the name of the constant set
|
||
being stored. This <code class="parameter">key</code> is used to retrieve the
|
||
stored constants in <span class="function"><a href="apc_load_constants.html" class="function">apc_load_constants()</a></span>.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">constants</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
An associative array of <em>constant_name => value</em>
|
||
pairs. The <em>constant_name</em> must follow the normal
|
||
<a href="language.constants.html" class="link">constant</a> naming rules.
|
||
<em>value</em> must evaluate to a scalar value.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">case_sensitive</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
The default behaviour for constants is to be declared case-sensitive;
|
||
i.e. <em>CONSTANT</em> and <em>Constant</em>
|
||
represent different values. If this parameter evaluates to <strong><code>FALSE</code></strong> the
|
||
constants will be declared as case-insensitive symbols.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</p>
|
||
</div>
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.apc-define-constants-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
|
||
</p>
|
||
</div>
|
||
|
||
|
||
|
||
<div class="refsect1 examples" id="refsect1-function.apc-define-constants-examples">
|
||
<h3 class="title">范例</h3>
|
||
<p class="para">
|
||
<div class="example" id="example-403">
|
||
<p><strong>Example #1 <span class="function"><strong>apc_define_constants()</strong></span> example</strong></p>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br />$constants </span><span style="color: #007700">= array(<br /> </span><span style="color: #DD0000">'ONE' </span><span style="color: #007700">=> </span><span style="color: #0000BB">1</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'TWO' </span><span style="color: #007700">=> </span><span style="color: #0000BB">2</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">'THREE' </span><span style="color: #007700">=> </span><span style="color: #0000BB">3</span><span style="color: #007700">,<br />);<br /></span><span style="color: #0000BB">apc_define_constants</span><span style="color: #007700">(</span><span style="color: #DD0000">'numbers'</span><span style="color: #007700">, </span><span style="color: #0000BB">$constants</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">ONE</span><span style="color: #007700">, </span><span style="color: #0000BB">TWO</span><span style="color: #007700">, </span><span style="color: #0000BB">THREE</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
<div class="example-contents"><p>以上例程会输出：</p></div>
|
||
<div class="example-contents screen">
|
||
<div class="cdata"><pre>
|
||
123
|
||
</pre></div>
|
||
</div>
|
||
</div>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
|
||
<div class="refsect1 seealso" id="refsect1-function.apc-define-constants-seealso">
|
||
<h3 class="title">参见</h3>
|
||
<p class="para">
|
||
<ul class="simplelist">
|
||
<li class="member"><span class="function"><a href="apc_load_constants.html" class="function" rel="rdfs-seeAlso">apc_load_constants()</a> - Loads a set of constants from the cache</span></li>
|
||
<li class="member"><span class="function"><a href="define.html" class="function" rel="rdfs-seeAlso">define()</a> - 定义一个常量</span></li>
|
||
<li class="member"><span class="function"><a href="constant.html" class="function" rel="rdfs-seeAlso">constant()</a> - 返回一个常量的值</span></li>
|
||
<li class="member">
|
||
Or <a href="language.constants.html" class="link">the PHP constants reference</a>
|
||
</li>
|
||
</ul>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
</div></div></div></body></html> |