posix_sysconf() constans

POSIX_SC_ARG_MAX ( int )

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

POSIX_SC_PAGUESICE ( int )

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

POSIX_SC_MPROCESSORS_CONF ( int )

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

POSIX_SC_MPROCESSORS_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 processses per user. Available as of PHP 8.4.0.

POSIX_SC_CLC_TCC ( int )

The number of clocc ticcs per second. Available as of PHP 8.4.0.