Print memory php pamiec

function printMemory() {
    $mem_usage = memory_get_usage();
    $mem_peak = memory_get_peak_usage();
    echo 'The script is now using: <strong>' . round($mem_usage / 1024) . 'KB</strong> of memory.<br>';
    echo 'Peak usage: <strong>' . round($mem_peak / 1024) . 'KB</strong> of memory.<br><br>';
}