function.syslog.html
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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>Generate a system log message</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="ref.network.html">Network Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.sam.html">SAM</a></div> <div class="up"><a href="ref.network.html">Network Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.syslog" class="refentry"> <div class="refnamediv"> <h1 class="refname">syslog</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">syslog</span> — <span class="dc-title">Generate a system log message</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>syslog</b></b></span> ( <span class="methodparam"><span class="type">int</span> <tt class="parameter">$priority</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$message</tt></span> )</div> <p class="para rdfs-comment"> <b>syslog()</b> generates a log message that will be distributed by the system logger. </p> <p class="para"> For information on setting up a user defined log handler, see the <span class="citerefentry"><span class="refentrytitle">syslog.conf</span> <span class="manvolnum">(5)</span></span> Unix manual page. More information on the syslog facilities and option can be found in the man pages for <span class="citerefentry"><span class="refentrytitle">syslog</span> <span class="manvolnum">(3)</span></span> on Unix machines. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">priority</tt></i></span> <dd> <p class="para"> <i><tt class="parameter">priority</tt></i> is a combination of the facility and the level. Possible values are: <table border="5"> <caption><b><b>syslog()</b> Priorities (in descending order)</b></caption> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Constant</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>LOG_EMERG</tt></b></td> <td colspan="1" rowspan="1" align="left">system is unusable</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>LOG_ALERT</tt></b></td> <td colspan="1" rowspan="1" align="left">action must be taken immediately</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>LOG_CRIT</tt></b></td> <td colspan="1" rowspan="1" align="left">critical conditions</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>LOG_ERR</tt></b></td> <td colspan="1" rowspan="1" align="left">error conditions</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>LOG_WARNING</tt></b></td> <td colspan="1" rowspan="1" align="left">warning conditions</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>LOG_NOTICE</tt></b></td> <td colspan="1" rowspan="1" align="left">normal, but significant, condition</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>LOG_INFO</tt></b></td> <td colspan="1" rowspan="1" align="left">informational message</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>LOG_DEBUG</tt></b></td> <td colspan="1" rowspan="1" align="left">debug-level message</td> </tr> </tbody> </colgroup> </table> </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">message</tt></i></span> <dd> <p class="para"> The message to send, except that the two characters <i>%m</i> will be replaced by the error message string (strerror) corresponding to the present value of <span class="errortype">errno</span>. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Using <b>syslog()</b></b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />define_syslog_variables</span><span style="color: #007700">();<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: $access {$_SERVER['REMOTE_ADDR']} ({$_SERVER['HTTP_USER_AGENT']})"</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></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <p class="para"> On Windows NT, the syslog service is emulated using the Event Log. </p> <blockquote><p><b class="note">Note</b>: Use of <i>LOG_LOCAL0</i> through <i>LOG_LOCAL7</i> for the <i><tt class="parameter">facility</tt></i> parameter of <a href="function.openlog.html" class="function">openlog()</a> is not available in Windows. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.define-syslog-variables.html" class="function" rel="rdfs-seeAlso">define_syslog_variables()</a></li> <li class="member"><a href="function.openlog.html" class="function" rel="rdfs-seeAlso">openlog()</a></li> <li class="member"><a href="function.closelog.html" class="function" rel="rdfs-seeAlso">closelog()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.network.html">Network Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.sam.html">SAM</a></div> <div class="up"><a href="ref.network.html">Network Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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