OS-generalized CPU counting

cpu-core-count.php

<?php
function countCpuCores() {
    $os = (stripos(PHP_OS, "WIN") === 0) ? "win" : strtolower(trim(shell_exec("uname")));
    switch ($os) {
        case "win":
            $cmd = "wmic cpu get NumberOfCores";
            break;
        case "linux":
            $cmd = "cat /proc/cpuinfo | grep processor | wc -l";
            break;
        case "freebsd":
            $cmd = "sysctl -a | grep 'hw.ncpu' | cut -d ':' -f2";
            break;
        case "darwin":
            $cmd = "sysctl -a | grep 'hw.ncpu:' | awk '{ print $2 }'";
            break;
        default:
            $cmd = NULL;
    }
    $execResult = $cmd ? shell_exec($cmd) : 1;
    if ($os === 'win') {
        $execResult = explode("\n", $execResult)[1];
    }
    $cores = intval(trim($execResult));

    return $cores;
}