N98 Magerun MemoryCommand

lib\Briteskies\Commands\MemoryCommand.php

<?php

namespace Briteskies\Commands;

use N98\Magento\command\AbstractMagentoCommand;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class MemoryCommand extends AbstractMagentoCommand
{
    protected function configure()
    {
        $this->setName('briteskies:memory')->setDescription('Determine amount of memory on the host');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $memory = $this->getMemory();
        $output->writeln("Total Memory: " . $this->memoryFormat($memory->total));
        $output->writeln("Free Memory: " . $this->memoryFormat($memory->free));
    }

    /**
     * @return \StdClass
     */
    private function getMemory()
    {
        $memory = new \StdClass();

        $memInfo = explode("\n", file_get_contents('/proc/meminfo'));
        $totalRaw = preg_grep('/MemTotal/', $memInfo);
        $freeRaw = preg_grep('/MemFree/', $memInfo);

        $memory->total = $this->getBytesFromMemoryString(array_pop($totalRaw));
        $memory->free = $this->getBytesFromMemoryString(array_pop($freeRaw));

        return $memory;
    }

    /**
     * @param $string
     * @return int
     */
    private function getBytesFromMemoryString($string)
    {
        // Split up the label and value
        $ra = explode(":", $string);
        // Remove tabs & whitespace
        $value = trim($ra[1]);
        // Remove the kB & whitespace (strips 2 characters from the end then trims whitespace)
        $value = trim(substr($value, 0, -2));
        // Convert to a number and multiply by 1024 to get bytes from kibibytes
        $bytes = intval($value, 10) * 1024;

        return $bytes;
    }

    /**
     * @param int $bytes
     * @return string
     */
    private function memoryFormat($bytes)
    {
        $magnitudes = array('KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB');
        reset($magnitudes);

        $magnitude = "B";
        $amt = $bytes;
        while ($amt > 1024) {
            $amt = $amt / 1024;
            $magnitude = current($magnitudes);

            if (!next($magnitudes)) {
                break;
            }
        }

        return number_format($amt, 2) . " " . $magnitude;
    }
}