php获取服务器内存信息

$load = sys_getloadavg();
echo "Load average: " . $load[0] . ", " . $load[1] . ", " . $load[2];

// Linux系统
$output = shell_exec('free -m');
echo "<pre>$output</pre>";

// Windows系统
$output = shell_exec('wmic OS get FreePhysicalMemory /Value');
echo "<pre>$output</pre>";

$memory_limit = ini_get('memory_limit');
echo "Memory limit: " . $memory_limit;

require_once 'phpsysinfo/SysInfo.php';
$sysInfo = new SysInfo();
echo $sysInfo->getMemInfo();

function getMemoryInfo() {
    $os = strtoupper(substr(PHP_OS, 0, 3));
    if ($os === 'WIN') {
        $output = shell_exec('wmic OS get FreePhysicalMemory /Value');
        preg_match('/FreePhysicalMemory=(\d+)/', $output, $matches);
        return ['free' => $matches[1]];
    } else {
        $output = shell_exec('free -m');
        preg_match_all('/(\d+)/', $output, $matches);
        return [
            'total' => $matches[0][1],
            'used' => $matches[0][2],
            'free' => $matches[0][3],
            'shared' => $matches[0][4],
            'buff/cache' => $matches[0][5],
            'available' => $matches[0][6]
        ];
    }
}

$info = getMemoryInfo();
print_r($info);