(PHP 4, PHP 5, PHP 7, PHP 8)
openlog — Open connection to system logger
openlog() opens a connection to the system logger for a program.
The use of openlog() is optional. It
will automatically be called by syslog() if
necessary, in which case prefix will default
to the empty string.
prefix
The string prefix is added to each message.
flagsBitmask of the following constants:
facility
The facility argument is used to specify
what type of program is logging the message.
This lets the configuration file specify that messages from different
facilities will be handled differently.
Must be one of the following constants:
LOG_AUTH LOG_AUTHPRIV LOG_CRON LOG_DAEMON LOG_KERN LOG_LOCAL[0-7] LOG_LPR LOG_MAIL LOG_NEWS LOG_SYSLOG LOG_USER LOG_UUCP Note: This parameter is ignored on Windows.
Always returns true .
To those curious; switching between different facilities is NOT an issue. There is no apparent memory overhead (nor slowdown) by calling openlog multiple(12 * 10000) times.
Shown by this example:
<?php
$facilities = array(
LOG_AUTH,
LOG_AUTHPRIV,
LOG_CRON,
LOG_DAEMON,
LOG_KERN,
LOG_LOCAL0,
LOG_LPR,
LOG_MAIL,
LOG_NEWS,
LOG_SYSLOG,
LOG_USER,
LOG_UUCP,
);
for ($i = 0; $i < 10000; $i++) {
foreach ($facilities as $facility) {
openlog('test', LOG_PID, $facility);
syslog(LOG_ERR, "This is a test: " . memory_get_usage(true));
}
}
?>