(PHP 8 >= 8.3.0)
posix_sysconf — Returns system runtime information
posix_sysconf(int $conf_id): int
Returns system runtime information.
conf_id Identifier of the variable with the following constants POSIX_SC_ARG_MAX, POSIX_SC_PAGESIZE, POSIX_SC_NPROCESSORS_CONF, POSIX_SC_NPROCESSORS_ONLN, POSIX_SC_CHILD_MAX, POSIX_SC_CLK_TCK
Returns the numeric value related to conf_id
Example #1 posix_sysconf() example
Returns the number of active cpus.
<?php echo posix_sysconf(POSIX_SC_NPROCESSORS_ONLN); ?>
The above example will output:
2
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https://www.php.net/manual/en/function.posix-sysconf.php