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php-manual-en-4.3.0-2mdk.noarch.rpm

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><H1
><A
NAME="function.syslog"
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>syslog</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN61006"
></A
><P
>    (PHP 3, PHP 4 )</P
>syslog&nbsp;--&nbsp;Generate a system log message</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN61009"
></A
><H2
>Description</H2
>int <B
CLASS="methodname"
>syslog</B
> ( int priority, string message)<BR
></BR
><P
>&#13;     <B
CLASS="function"
>syslog()</B
> generates a log message that will be
     distributed by the system logger.
     <TT
CLASS="parameter"
><I
>priority</I
></TT
> is a combination of the facility
     and the level, values for which are given in the next section.
     The remaining argument is the message to send, except that the
     two characters <TT
CLASS="literal"
>%m</TT
> will be replaced by the
     error message string (strerror) corresponding to the present
     value of <SPAN
CLASS="errortype"
>errno</SPAN
>.
    </P
><P
>&#13;     <DIV
CLASS="table"
><A
NAME="AEN61026"
></A
><P
><B
>Table 1. <B
CLASS="function"
>syslog()</B
> Priorities (in descending order)</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Constant</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>LOG_EMERG</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>system is unusable</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>LOG_ALERT</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>action must be taken immediately</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>LOG_CRIT</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>critical conditions</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>LOG_ERR</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>error conditions</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>LOG_WARNING</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>warning conditions</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>LOG_NOTICE</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>normal, but significant, condition</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>LOG_INFO</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>informational message</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>LOG_DEBUG</TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>debug-level message</TD
></TR
></TBODY
></TABLE
></DIV
>
    </P
><P
>&#13;     <TABLE
WIDTH="100%"
BORDER="0"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN61060"
></A
><P
><B
>Example 1. Using <B
CLASS="function"
>syslog()</B
></B
></P
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><TD
><PRE
CLASS="php"
>&#60;?php
define_syslog_variables();
// open syslog, include the process ID and also send
// the log to standard error, and use a user defined
// logging mechanism
openlog("myScripLog", LOG_PID | LOG_PERROR, LOG_LOCAL0);

// some code

if (authorized_client()) {
    // do something
} else {
    // unauthorized client!
    // log the attempt
    $access = date("Y/m/d H:i:s");
    syslog(LOG_WARNING,"Unauthorized client: $access $REMOTE_ADDR ($HTTP_USER_AGENT)");
}

closelog();
?&#62;</PRE
></TD
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>
     For information on setting up a user defined log handler, see the
     <SPAN
CLASS="citerefentry"
><SPAN
CLASS="refentrytitle"
>syslog.conf</SPAN
>(5)</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
>(3)</SPAN
> on Unix machines.
    </P
><P
>&#13;     On Windows NT, the syslog service is emulated using the Event
     Log.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
      Use of <TT
CLASS="literal"
>LOG_LOCAL0</TT
> through
      <TT
CLASS="literal"
>LOG_LOCAL7</TT
> for the <TT
CLASS="parameter"
><I
>facility</I
></TT
> 
      parameter of <A
HREF="function.openlog.html"
><B
CLASS="function"
>openlog()</B
></A
> is not available
      in Windows.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     See also <A
HREF="function.define-syslog-variables.html"
><B
CLASS="function"
>define_syslog_variables()</B
></A
>,
     <A
HREF="function.openlog.html"
><B
CLASS="function"
>openlog()</B
></A
> and
     <A
HREF="function.closelog.html"
><B
CLASS="function"
>closelog()</B
></A
>.
    </P
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