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Source of: /manual/en/network.constants.php

<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/include/shared-manual.inc';
$TOC = array();
$PARENTS = array();
include_once dirname(__FILE__) ."/toc/book.network.inc";
$setup = array (
  'home' =>
  array (
    0 => 'index.php',
    1 => 'PHP Manual',
  ),
  'head' =>
  array (
    0 => 'UTF-8',
    1 => 'en',
  ),
  'this' =>
  array (
    0 => 'network.constants.php',
    1 => 'Predefined Constants',
  ),
  'up' =>
  array (
    0 => 'book.network.php',
    1 => 'Network',
  ),
  'prev' =>
  array (
    0 => 'network.resources.php',
    1 => 'Resource Types',
  ),
  'next' =>
  array (
    0 => 'ref.network.php',
    1 => 'Network Functions',
  ),
);
$setup["toc"] = $TOC;
$setup["parents"] = $PARENTS;
manual_setup($setup);

manual_header();
?>
<div>
 <h1>Predefined Constants</h1>

 <p class="simpara">
The constants below are always available as part of the PHP core.
</p>
  <table class="doctable table">
   <caption><b><a href="function.openlog.php" class="function">openlog()</a> Options</b></caption>
  
    <thead valign="middle">
     <tr valign="middle">
      <th>Constant</th>
      <th>Description</th>
     </tr>

    </thead>

    <tbody valign="middle" class="tbody">
     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_CONS</tt></b></td>
      <td align="left">
       if there is an error while sending data to the system logger,
       write directly to the system console
      </td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_NDELAY</tt></b></td>
      <td align="left">
       open the connection to the logger immediately
      </td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_ODELAY</tt></b></td>
      <td align="left">
       (default) delay opening the connection until the first
       message is logged
      </td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_NOWAIT</tt></b></td>
      <td align="left">
      </td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_PERROR</tt></b></td>
      <td align="left">print log message also to standard error</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_PID</tt></b></td>
      <td align="left">include PID with each message</td>
     </tr>

    </tbody>
  
  </table>


  <table class="doctable table">
   <caption><b><a href="function.openlog.php" class="function">openlog()</a> Facilities</b></caption>
  
    <thead valign="middle">
     <tr valign="middle">
      <th>Constant</th>
      <th>Description</th>
     </tr>

    </thead>

    <tbody valign="middle" class="tbody">
     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_AUTH</tt></b></td>
      <td align="left">
       security/authorization messages (use <b><tt class="constant">LOG_AUTHPRIV</tt></b> instead
       in systems where that constant is defined)
      </td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_AUTHPRIV</tt></b></td>
      <td align="left">security/authorization messages (private)</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_CRON</tt></b></td>
      <td align="left">clock daemon (cron and at)</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_DAEMON</tt></b></td>
      <td align="left">other system daemons</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_KERN</tt></b></td>
      <td align="left">kernel messages</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_LOCAL0 ... LOG_LOCAL7</tt></b></td>
      <td align="left">reserved for local use, these are not available in Windows</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_LPR</tt></b></td>
      <td align="left">line printer subsystem</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_MAIL</tt></b></td>
      <td align="left">mail subsystem</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_NEWS</tt></b></td>
      <td align="left">USENET news subsystem</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_SYSLOG</tt></b></td>
      <td align="left">messages generated internally by syslogd</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_USER</tt></b></td>
      <td align="left">generic user-level messages</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_UUCP</tt></b></td>
      <td align="left">UUCP subsystem</td>
     </tr>

    </tbody>
  
  </table>


  <table class="doctable table">
   <caption><b><a href="function.syslog.php" class="function">syslog()</a> Priorities (in descending order)</b></caption>
  
    <thead valign="middle">
     <tr valign="middle">
      <th>Constant</th>
      <th>Description</th>
     </tr>

    </thead>

    <tbody valign="middle" class="tbody">
     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_EMERG</tt></b></td>
      <td align="left">system is unusable</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_ALERT</tt></b></td>
      <td align="left">action must be taken immediately</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_CRIT</tt></b></td>
      <td align="left">critical conditions</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_ERR</tt></b></td>
      <td align="left">error conditions</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_WARNING</tt></b></td>
      <td align="left">warning conditions</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_NOTICE</tt></b></td>
      <td align="left">normal, but significant, condition</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_INFO</tt></b></td>
      <td align="left">informational message</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">LOG_DEBUG</tt></b></td>
      <td align="left">debug-level message</td>
     </tr>

    </tbody>
  
  </table>

  <table class="doctable table">
   <caption><b><a href="function.dns-get-record.php" class="function">dns_get_record()</a> Options</b></caption>
  
    <thead valign="middle">
     <tr valign="middle">
      <th>Constant</th>
      <th>Description</th>
     </tr>

    </thead>

    <tbody valign="middle" class="tbody">
     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_A</tt></b></td>
      <td align="left">IPv4 Address Resource</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_MX</tt></b></td>
      <td align="left">Mail Exchanger Resource</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_CNAME</tt></b></td>
      <td align="left">Alias (Canonical Name) Resource</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_NS</tt></b></td>
      <td align="left">Authoritative Name Server Resource</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_PTR</tt></b></td>
      <td align="left">Pointer Resource</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_HINFO</tt></b></td>
      <td align="left">Host Info Resource (See IANA&#039;s
       <a href="http://www.iana.org/assignments/operating-system-names" class="link external">&raquo; <i>Operating System Names</i></a>
        for the meaning of these values)</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_SOA</tt></b></td>
      <td align="left">Start of Authority Resource</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_TXT</tt></b></td>
      <td align="left">Text Resource</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_ANY</tt></b></td>
      <td align="left">Any Resource Record.  On most systems
        this returns all resource records, however
        it should not be counted upon for critical
        uses. Try <b><tt class="constant">DNS_ALL</tt></b> instead.</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_AAAA</tt></b></td>
      <td align="left">IPv6 Address Resource</td>
     </tr>

     <tr valign="middle">
      <td align="left"><b><tt class="constant">DNS_ALL</tt></b></td>
      <td align="left">Iteratively query the name server for
        each available record type.</td>
     </tr>

    </tbody>
  
  </table>

</div>
<?php manual_footer(); ?>
 
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