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.
LOG_NDELAY int
Open the connection to the logger immediately.
LOG_ODELAY int
Delay opening the connection until the first message is logged.
This is the default behaviour.
LOG_NOWAIT int
LOG_PERROR int
Additionally log messages to STDERR
LOG_PID int
Include the PID with each log message.
Available facility for
openlog()
LOG_AUTH int
For security/authorization messages.
Note :
Use LOG_AUTHPRIV
LOG_AUTHPRIV int
For private security/authorization messages.
LOG_CRON int
For clock daemon messages.
For example cron or at .
LOG_DAEMON int
For system daemon messages.
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.
LOG_LPR int
For messages from the line printer subsystem.
LOG_MAIL int
For messages from the mail subsystem.
LOG_NEWS int
For messages from the USENET news subsystem.
LOG_SYSLOG int
For messages generated internally by syslogd .
LOG_USER int
For generic user-level messages.
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.
LOG_CRIT int
Critical, action is required.
For example, a hard device errors.
LOG_ERR int
Errors messages.
LOG_WARNING int
Warning messages.
LOG_NOTICE int
Notice messages, corresponds to conditions that are not error conditions,
but that may require special handling.
LOG_INFO int
Informational messages.
LOG_DEBUG int
Debugging messages that contain information normally of use only when
debugging a program.
Available types for
dns_get_record()
DNS_ANY int
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
DNS_ALL int
Iteratively query the name server for each available record type.
DNS_A int
IPv4 Address Resource.
DNS_AAAA int
IPv6 Address Resource.
DNS_A6 int
Defined as part of early IPv6, but downgraded to historic by
» RFC 6563 .
DNS_CAA int
Certification Authority Authorization Resource.
Available as of PHP 7.0.16 and 7.1.2.
Warning
Not available on Windows.
DNS_CNAME int
Alias (Canonical Name) Resource.
DNS_HINFO int
Host Info Resource.
For more explanations and meanings of these values, visit IANA's page on
» Operating System Names .
DNS_MX int
Mail Exchanger Resource.
DNS_NAPTR int
Naming Authority Pointer.
DNS_NS int
Authoritative Name Server Resource.
DNS_PTR int
Pointer Resource.
DNS_SOA int
Start of Authority Resource.
DNS_SRV int
Service locator.
DNS_TXT int
Text Resource.
Resource Types
Network