if(!strcmp("/pm", cmdtext, true))
{
  tmp = strtok(cmdtext,idx);
  if(!strlen(tmp)) return SendClientMessage(playerid,0xFF0000FF,"USAGE: /PM (id) (message)");
  new id = strval(tmp);
  gMessage = strrest(cmdtext,idx);
  if(!strlen(gMessage)) return SendClientMessage(playerid,0xFF0000FF,"Usage: /pm (id) (message)");      
  if(!IsPlayerConnected(id)) return SendClientMessage(playerid,0xFF0000FF,"/pm :Invalid ID");   
  GetPlayerName(id,iName,sizeof(iName));
  GetPlayerName(playerid,pName,sizeof(pName));
  format(Message,sizeof(Message),">> %s(%i): %s",iName,id,gMessage);
  SendClientMessage(playerid,0xFFD720FF,Message);
  format(Message,sizeof(Message),"** %s(%i): %s",pName,playerid,gMessage);
  SendClientMessage(id,0xFFD720FF,Message);

//Here it logs to your server output, this us just an example, you can also write to file etc
  printf("%s(%i)->%s(%i): %s", pName, playerid, iName, id, gMessage);

  PlayerPlaySound(id,1085,0.0,0.0,0.0);
  return 1;
}