No, I mean megabytes
$this->bbcode_second_pass_code('', '
[user@alarm ~]$ head -n4 /proc/meminfo
MemTotal: 123040 kB
MemFree: 9356 kB
Buffers: 21684 kB
Cached: 47572 kB
')
free -m means "display memory usage in megabytes", read man free.
$this->bbcode_second_pass_code('', '
[user@alarm ~]$ free -h
total used free shared buffers cached
Mem: 120M 111M 9,1M 0B 21M 46M
-/+ buffers/cache: 43M 76M
Swap: 120M 12M 107M
')
Output of top relates to the first line of free.