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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>Predefined Constants</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="network.resources.html">Resource Types</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.network.html">Network Functions</a></div> <div class="up"><a href="book.network.html">Network</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div> <h1>Predefined Constants</h1> <p class="simpara">The constants below are always available as part of the PHP core.</p> <table border="5"> <caption><b><a href="function.openlog.html" class="function">openlog()</a> Options</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">LOG_CONS</td> <td colspan="1" rowspan="1" 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 colspan="1" rowspan="1" align="left">LOG_NDELAY</td> <td colspan="1" rowspan="1" align="left"> open the connection to the logger immediately </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_ODELAY</td> <td colspan="1" rowspan="1" align="left"> (default) delay opening the connection until the first message is logged </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_NOWAIT</td> <td colspan="1" rowspan="1" align="left"> </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_PERROR</td> <td colspan="1" rowspan="1" align="left">print log message also to standard error</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_PID</td> <td colspan="1" rowspan="1" align="left">include PID with each message</td> </tr> </tbody> </colgroup> </table> <table border="5"> <caption><b><a href="function.openlog.html" class="function">openlog()</a> Facilities</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">LOG_AUTH</td> <td colspan="1" rowspan="1" align="left"> security/authorization messages (use LOG_AUTHPRIV instead in systems where that constant is defined) </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_AUTHPRIV</td> <td colspan="1" rowspan="1" align="left">security/authorization messages (private)</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_CRON</td> <td colspan="1" rowspan="1" align="left">clock daemon (cron and at)</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_DAEMON</td> <td colspan="1" rowspan="1" align="left">other system daemons</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_KERN</td> <td colspan="1" rowspan="1" align="left">kernel messages</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_LOCAL0 ... LOG_LOCAL7</td> <td colspan="1" rowspan="1" align="left">reserved for local use, these are not available in Windows</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_LPR</td> <td colspan="1" rowspan="1" align="left">line printer subsystem</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_MAIL</td> <td colspan="1" rowspan="1" align="left">mail subsystem</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_NEWS</td> <td colspan="1" rowspan="1" align="left">USENET news subsystem</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_SYSLOG</td> <td colspan="1" rowspan="1" align="left">messages generated internally by syslogd</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_USER</td> <td colspan="1" rowspan="1" align="left">generic user-level messages</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_UUCP</td> <td colspan="1" rowspan="1" align="left">UUCP subsystem</td> </tr> </tbody> </colgroup> </table> <table border="5"> <caption><b><a href="function.syslog.html" class="function">syslog()</a> 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">LOG_EMERG</td> <td colspan="1" rowspan="1" align="left">system is unusable</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_ALERT</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">LOG_CRIT</td> <td colspan="1" rowspan="1" align="left">critical conditions</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_ERR</td> <td colspan="1" rowspan="1" align="left">error conditions</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_WARNING</td> <td colspan="1" rowspan="1" align="left">warning conditions</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_NOTICE</td> <td colspan="1" rowspan="1" align="left">normal, but significant, condition</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_INFO</td> <td colspan="1" rowspan="1" align="left">informational message</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">LOG_DEBUG</td> <td colspan="1" rowspan="1" align="left">debug-level message</td> </tr> </tbody> </colgroup> </table> <table border="5"> <caption><b><a href="function.dns-get-record.html" class="function">dns_get_record()</a> Options</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">DNS_A</td> <td colspan="1" rowspan="1" align="left">IPv4 Address Resource</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_MX</td> <td colspan="1" rowspan="1" align="left">Mail Exchanger Resource</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_CNAME</td> <td colspan="1" rowspan="1" align="left">Alias (Canonical Name) Resource</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_NS</td> <td colspan="1" rowspan="1" align="left">Authoritative Name Server Resource</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_PTR</td> <td colspan="1" rowspan="1" align="left">Pointer Resource</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_HINFO</td> <td colspan="1" rowspan="1" align="left">Host Info Resource (See IANA's <a href="http://www.iana.org/assignments/operating-system-names" class="link external">» Operating System Names</a> for the meaning of these values)</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_SOA</td> <td colspan="1" rowspan="1" align="left">Start of Authority Resource</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_TXT</td> <td colspan="1" rowspan="1" align="left">Text Resource</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_ANY</td> <td colspan="1" rowspan="1" align="left">Any Resource Record. On most systems this returns all resource records, however it should not be counted upon for critical uses. Try DNS_ALL instead.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_AAAA</td> <td colspan="1" rowspan="1" align="left">IPv6 Address Resource</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DNS_ALL</td> <td colspan="1" rowspan="1" align="left">Iteratively query the name server for each available record type.</td> </tr> </tbody> </colgroup> </table></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="network.resources.html">Resource Types</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.network.html">Network Functions</a></div> <div class="up"><a href="book.network.html">Network</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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