Calculating script memory usages in PHP?

Question

Is it as simple as calling memory_get_usage() at the start and end of a script and subtracting the 1st from the second value, to get the total memory used on that script? If so, how can I convert that value to a more understandable number like kb and mb?

Answer 1

you mean something like this , it use to nice format of file size but u can use it for your problem

function file_size($size)
{

    $filesizename = array(" Bytes", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB");
    return $size ? round($size/pow(1024, ($i = floor(log($size, 1024)))), 2) .$filesizename[$i] : '0 Bytes';
}

Answer 2

You may prefer to just call memory_get_peak_usage at the end of your script, which will return the highest total allocation during execution. This is more likely to be a useful figure - getting the start and end values doesn't account for memory allocated then deallocated during runtime.

Formatting this into a human readable number can be handled manually (just divide by 1024 then print as Kb), or with a class like NumberFormatter.