Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.1k views
in Technique[技术] by (71.8m points)

get server ram with php

Is there a way to know the avaliable ram in a server (linux distro) with php (widthout using linux commands)?

edit: sorry, the objective is to be aware of the ram available in the server / virtual machine, for the particular server (even if that memory is shared).

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

If you know this code will only be running under Linux, you can use the special /proc/meminfo file to get information about the system's virtual memory subsystem. The file has a form like this:

MemTotal:       255908 kB
MemFree:         69936 kB
Buffers:         15812 kB
Cached:         115124 kB
SwapCached:          0 kB
Active:          92700 kB
Inactive:        63792 kB
...

That first line, MemTotal: ..., contains the amount of physical RAM in the machine, minus the space reserved by the kernel for its own use. It's the best way I know of to get a simple report of the usable memory on a Linux system. You should be able to extract it via something like the following code:

<?php
  $fh = fopen('/proc/meminfo','r');
  $mem = 0;
  while ($line = fgets($fh)) {
    $pieces = array();
    if (preg_match('/^MemTotal:s+(d+)skB$/', $line, $pieces)) {
      $mem = $pieces[1];
      break;
    }
  }
  fclose($fh);

  echo "$mem kB RAM found"; ?>

(Please note: this code may require some tweaking for your environment.)


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...