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Predefined Constants
The constants below are always available as part of the PHP core.
Available flags for
openlog
-
LOG_CONS
(int)
-
If there is an error while sending data to the system logger,
write directly to the system console.
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LOG_NDELAY
(int)
-
Open the connection to the logger immediately.
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LOG_ODELAY
(int)
-
Delay opening the connection until the first message is logged.
This is the default behaviour.
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LOG_NOWAIT
(int)
-
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LOG_PERROR
(int)
-
Additionally log messages to
STDERR.
-
LOG_PID
(int)
-
Include the PID with each log message.
Available facility for
openlog
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LOG_AUTH
(int)
-
For security/authorization messages.
Note:
Use LOG_AUTHPRIV instead when available.
-
LOG_AUTHPRIV
(int)
-
For private security/authorization messages.
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LOG_CRON
(int)
-
For clock daemon messages.
For example cron or at.
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LOG_DAEMON
(int)
-
For system daemon messages.
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LOG_KERN
(int)
-
For kernel messages.
-
LOG_LOCAL0
(int)
-
Reserved for local use.
Warning
Not available on Windows.
-
LOG_LOCAL1
(int)
-
Reserved for local use.
Warning
Not available on Windows.
-
LOG_LOCAL2
(int)
-
Reserved for local use.
Warning
Not available on Windows.
-
LOG_LOCAL3
(int)
-
Reserved for local use.
Warning
Not available on Windows.
-
LOG_LOCAL4
(int)
-
Reserved for local use.
Warning
Not available on Windows.
-
LOG_LOCAL5
(int)
-
Reserved for local use.
Warning
Not available on Windows.
-
LOG_LOCAL6
(int)
-
Reserved for local use.
Warning
Not available on Windows.
-
LOG_LOCAL7
(int)
-
Reserved for local use.
Warning
Not available on Windows.
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LOG_LPR
(int)
-
For messages from the line printer subsystem.
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LOG_MAIL
(int)
-
For messages from the mail subsystem.
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LOG_NEWS
(int)
-
For messages from the USENET news subsystem.
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LOG_SYSLOG
(int)
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For messages generated internally by syslogd.
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LOG_USER
(int)
-
For generic user-level messages.
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LOG_UUCP
(int)
-
For messages from the UUCP subsystem.
Available priority for
syslog
The priority constants are listed from urgent, to debug messages.
-
LOG_EMERG
(int)
-
Emergency, the system is unusable.
This corresponds to a panic condition.
Usually broadcast to all processes.
-
LOG_ALERT
(int)
-
Alert, immediate action is required.
For example, a corrupted system database.
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LOG_CRIT
(int)
-
Critical, action is required.
For example, a hard device errors.
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LOG_ERR
(int)
-
Errors messages.
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LOG_WARNING
(int)
-
Warning messages.
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LOG_NOTICE
(int)
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Notice messages, corresponds to conditions that are not error conditions,
but that may require special handling.
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LOG_INFO
(int)
-
Informational messages.
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LOG_DEBUG
(int)
-
Debugging messages that contain information normally of use only when
debugging a program.
Available types for
dns_get_record
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DNS_ANY
(int)
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Any Resource Record.
On most systems this returns all resource records,
however due to eccentricities in the performance of
libresolv between platforms this is not guaranteed.
The slower DNS_ALL will collect all records more reliably.
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DNS_ALL
(int)
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Iteratively query the name server for each available record type.
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DNS_A
(int)
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IPv4 Address Resource.
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DNS_AAAA
(int)
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IPv6 Address Resource.
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DNS_A6
(int)
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Defined as part of early IPv6, but downgraded to historic by
» RFC 6563.
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DNS_CAA
(int)
-
Certification Authority Authorization Resource.
Available as of PHP 7.0.16 and 7.1.2.
Warning
Not available on Windows.
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DNS_CNAME
(int)
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Alias (Canonical Name) Resource.
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DNS_HINFO
(int)
-
Host Info Resource.
For more explanations and meanings of these values, visit IANA's page on
» Operating System Names.
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DNS_MX
(int)
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Mail Exchanger Resource.
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DNS_NAPTR
(int)
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Naming Authority Pointer.
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DNS_NS
(int)
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Authoritative Name Server Resource.
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DNS_PTR
(int)
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Pointer Resource.
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DNS_SOA
(int)
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Start of Authority Resource.
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DNS_SRV
(int)
-
Service locator.
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DNS_TXT
(int)
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Text Resource.
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