posix_sysconf() constants

POSIX_SC_ARG_MAX (int)

The maximum number of bytes the arguments (and environment variables) can have. Available as of PHP 8.3.0.

POSIX_SC_PAGESIZE (int)

The number of bytes of the current page. Available as of PHP 8.3.0.

POSIX_SC_NPROCESSORS_CONF (int)

The number of cpus configured system wise. Available as of PHP 8.3.0.

POSIX_SC_NPROCESSORS_ONLN (int)

The number of cpus currently active system wise. Available as of PHP 8.3.0.

POSIX_SC_CHILD_MAX (int)

The maximum number of simultaneous processes per user. Available as of PHP 8.4.0.

POSIX_SC_CLK_TK (int)

The number of clock ticks per second. Available as of PHP 8.4.0.