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HTML
186 lines
8.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Generate a system log message</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.syslog" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">syslog</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">syslog</span> — <span class="dc-title">Generate a system log message</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.syslog-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>syslog</strong></span>
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( <span class="methodparam"><span class="type">int</span> <code class="parameter">$priority</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$message</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>syslog()</strong></span> generates a log message that will be
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distributed by the system logger.
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</p>
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<p class="para">
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For information on setting up a user defined log handler, see the
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<span class="citerefentry"><span class="refentrytitle">syslog.conf</span>
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<span class="manvolnum">(5)</span></span> Unix manual page. More
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information on the syslog facilities and option can be found in the man
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pages for <span class="citerefentry"><span class="refentrytitle">syslog</span>
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<span class="manvolnum">(3)</span></span> on Unix machines.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.syslog-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">priority</code></dt>
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<dd>
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<p class="para">
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<code class="parameter">priority</code> is a combination of the facility and
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the level. Possible values are:
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<table class="doctable table">
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<caption><strong><span class="function"><strong>syslog()</strong></span> Priorities (in descending order)</strong></caption>
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<thead>
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<tr>
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<th>Constant</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td><strong><code>LOG_EMERG</code></strong></td>
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<td>system is unusable</td>
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</tr>
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<tr>
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<td><strong><code>LOG_ALERT</code></strong></td>
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<td>action must be taken immediately</td>
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</tr>
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<tr>
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<td><strong><code>LOG_CRIT</code></strong></td>
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<td>critical conditions</td>
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</tr>
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<tr>
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<td><strong><code>LOG_ERR</code></strong></td>
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<td>error conditions</td>
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</tr>
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<tr>
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<td><strong><code>LOG_WARNING</code></strong></td>
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<td>warning conditions</td>
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</tr>
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<tr>
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<td><strong><code>LOG_NOTICE</code></strong></td>
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<td>normal, but significant, condition</td>
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</tr>
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<tr>
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<td><strong><code>LOG_INFO</code></strong></td>
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<td>informational message</td>
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</tr>
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<tr>
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<td><strong><code>LOG_DEBUG</code></strong></td>
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<td>debug-level message</td>
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</tr>
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</tbody>
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</table>
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</p>
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</dd>
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<dt>
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<code class="parameter">message</code></dt>
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<dd>
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<p class="para">
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The message to send, except that the two characters
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<em>%m</em> will be replaced by the error message string
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(strerror) corresponding to the present value of
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<span class="errortype">errno</span>.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.syslog-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.syslog-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-5506">
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<p><strong>Example #1 Using <span class="function"><strong>syslog()</strong></span></strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// open syslog, include the process ID and also send<br />// the log to standard error, and use a user defined<br />// logging mechanism<br /></span><span style="color: #0000BB">openlog</span><span style="color: #007700">(</span><span style="color: #DD0000">"myScriptLog"</span><span style="color: #007700">, </span><span style="color: #0000BB">LOG_PID </span><span style="color: #007700">| </span><span style="color: #0000BB">LOG_PERROR</span><span style="color: #007700">, </span><span style="color: #0000BB">LOG_LOCAL0</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// some code<br /><br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">authorized_client</span><span style="color: #007700">()) {<br /> </span><span style="color: #FF8000">// do something<br /></span><span style="color: #007700">} else {<br /> </span><span style="color: #FF8000">// unauthorized client!<br /> // log the attempt<br /> </span><span style="color: #0000BB">$access </span><span style="color: #007700">= </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"Y/m/d H:i:s"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">syslog</span><span style="color: #007700">(</span><span style="color: #0000BB">LOG_WARNING</span><span style="color: #007700">, </span><span style="color: #DD0000">"Unauthorized client: </span><span style="color: #0000BB">$access</span><span style="color: #DD0000"> </span><span style="color: #007700">{</span><span style="color: #0000BB">$_SERVER</span><span style="color: #007700">[</span><span style="color: #DD0000">'REMOTE_ADDR'</span><span style="color: #007700">]}</span><span style="color: #DD0000"> (</span><span style="color: #007700">{</span><span style="color: #0000BB">$_SERVER</span><span style="color: #007700">[</span><span style="color: #DD0000">'HTTP_USER_AGENT'</span><span style="color: #007700">]}</span><span style="color: #DD0000">)"</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">closelog</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.syslog-notes">
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<h3 class="title">注释</h3>
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<p class="para">
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On Windows NT, the syslog service is emulated using the Event
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Log.
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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Use of <em>LOG_LOCAL0</em> through
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<em>LOG_LOCAL7</em> for the <code class="parameter">facility</code>
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parameter of <span class="function"><a href="openlog.html" class="function">openlog()</a></span> is not available
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in Windows.
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.syslog-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="openlog.html" class="function" rel="rdfs-seeAlso">openlog()</a> - Open connection to system logger</span></li>
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<li class="member"><span class="function"><a href="closelog.html" class="function" rel="rdfs-seeAlso">closelog()</a> - 关闭系统日志链接</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |