get_mem_info.php

/**
 * Get memory usage information.
 * 
 * Requires {@link https://gist.github.com/3759346 strtobytes}.
 * 
 * @author Craig Anderson <craiga@craiga.id.au>
 * @link https://gist.github.com/craiga/9e35e52168aefe58b9eb
 */
function get_mem_info()
{
    $memInfo = array();
    if (file_exists("/proc/meminfo")) {
        $rawMemInfo = file_get_contents("/proc/meminfo");
        $memInfoLines = explode("\n", $rawMemInfo);
        foreach ($memInfoLines as $memInfoLine) {
            $memInfoData = preg_split("/:\s+/", $memInfoLine, 2);
            if (count($memInfoData) == 2) {
                $memInfo[$memInfoData[0]] = strtobytes($memInfoData[1]);
            }
        }
    }
    return $memInfo;
}