RpmQuery : A quick class to monitor installed Rpms with rpm -q

Rpm.php

<?php

class Rpm
{
    const FILED_SEPARATOR = ';;;';
    const ROW_SEPARATOR = '|||';

    public function listPackages()
    {
        $parameters = array('name', 'version', 'packager');
        $command = sprintf('rpm -q -a --queryformat "%s"', $this->getQueryFormatForParameters($parameters));
        $process = new process($command);
        $process->run();

        $rpms = array();
        $rows = explode(self::ROW_SEPARATOR, $process->getOutput());

        foreach ($rows as $row) {
            $parts = explode(self::FILED_SEPARATOR, $row);
            if (count($parts) == count($parameters)) {
                $rpms[] = $this->getRpmWithParameters($parts, $parameters);
            }
        }

        return $rpms;
    }


    public function package($package_name)
    {
        $parameters = array('name', 'size', 'version', 'packager', 'release', 'installtime');
        $command = sprintf('rpm -q %s --queryformat "%s"', $package_name, $this->getQueryFormatForParameters($parameters, false));
        $process = new process($command);
        $process->run();

        $row = $process->getOutput();
        $parts = explode(self::FILED_SEPARATOR, $row);
        
        if (count($parts) == count($parameters)) {
            return $this->getRpmWithParameters($parts, $parameters);
        }
        
        return null;
    }

    private function getQueryFormatForParameters($parameters, $row_separator = true)
    {
        $strs = array();
        foreach ($parameters as $parameter) {
            $strs[] = '%{'.$parameter.'}';
        }

        return implode(self::FILED_SEPARATOR, $strs).($row_separator ? self::ROW_SEPARATOR : '');
    }

    private function getRpmWithParameters($parts, $parameters)
    {
        $rpm = array();

        $key = 0;
        foreach ($parameters as $parameter) {
            $rpm[$parameter] = trim($parts[$key]);
            $key++;
        }

        return $rpm;
    }
}

usage.php

<?php

   $rpm = new Rpm();
   $packages = $rpm->listPacakges();
   $package  = $rpm->package('php');