Predefined Constants
The constants below are always available as part of the
PHP core.
Table 2. openlog() Options
Constant Description
LOG_CONS if there is an error while sending data to the
system logger, write directly to the system console
LOG_NDELAY open the connection to the logger immediately
LOG_ODELAY (default) delay opening the connection until
the first message is logged
LOG_NOWAIT
LOG_PERROR print log message also to standard error
LOG_PID include PID with each message
Table 3. openlog() Facilities
Constant Description
LOG_AUTH security/authorization messages (use LOG_AUTHPRIV
instead in systems where that constant is defined)
LOG_AUTHPRIV security/authorization messages (private)
LOG_CRON clock daemon (cron and at)
LOG_DAEMON other system daemons
LOG_KERN kernel messages
LOG_LOCAL0 ... LOG_LOCAL7 reserved for local use, these
are not available in Windows
LOG_LPR line printer subsystem
LOG_MAIL mail subsystem
LOG_NEWS USENET news subsystem
LOG_SYSLOG messages generated internally by syslogd
LOG_USER generic user-level messages
LOG_UUCP UUCP subsystem
Table 4. syslog() Priorities (in descending order)
Constant Description
LOG_EMERG system is unusable
LOG_ALERT action must be taken immediately
LOG_CRIT critical conditions
LOG_ERR error conditions
LOG_WARNING warning conditions
LOG_NOTICE normal, but significant, condition
LOG_INFO informational message
LOG_DEBUG debug-level message
Table 5. dns_get_record() Options
Constant Description
DNS_A IPv4 Address Resource
DNS_MX Mail Exchanger Resource
DNS_CNAME Alias (Canonical Name) Resource
DNS_NS Authoritative Name Server Resource
DNS_PTR Pointer Resource
DNS_HINFO Host Info Resource (See IANA's Operating System
Names for the meaning of these values)
DNS_SOA Start of Authority Resource
DNS_TXT Text Resource
DNS_ANY 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.
DNS_AAAA IPv6 Address Resource
DNS_ALL Iteratively query the name server for each available
record type.
Table of Contents
checkdnsrr -- Check DNS records corresponding to a given
Internet host name or IP address
closelog -- Close connection to system logger
debugger_off -- Disable internal PHP debugger (PHP 3)
debugger_on -- Enable internal PHP debugger (PHP 3)
define_syslog_variables -- Initializes all syslog related
constants
dns_check_record -- Synonym for checkdnsrr()
dns_get_mx -- Synonym for getmxrr()
dns_get_record -- Fetch DNS Resource Records associated
with a hostname
fsockopen -- Open Internet or Unix domain socket connection
gethostbyaddr -- Get the Internet host name corresponding
to a given IP address
gethostbyname -- Get the IP address corresponding to a given
Internet host name
gethostbynamel -- Get a list of IP addresses corresponding
to a given Internet host name
getmxrr -- Get MX records corresponding to a given Internet
host name
getprotobyname -- Get protocol number associated with protocol
name
getprotobynumber -- Get protocol name associated with protocol
number
getservbyname -- Get port number associated with an Internet
service and protocol
getservbyport -- Get Internet service which corresponds
to port and protocol
ip2long -- Converts a string containing an (IPv4) Internet
Protocol dotted address into a proper address.
long2ip -- Converts an (IPv4) Internet network address into
a string in Internet standard dotted format
openlog -- Open connection to system logger
pfsockopen -- Open persistent Internet or Unix domain socket
connection
socket_get_status -- Alias of stream_get_meta_data()
socket_set_blocking -- Alias of stream_set_blocking()
socket_set_timeout -- Alias of stream_set_timeout()
syslog -- Generate a system log message
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