Seems like social network has bring new wave of how human interact in virtual way. The good things is, why we all like it very much, it connect to old friends to a level of we could never imagine before. Of course this bring new value for humanity as well as human-and-human interaction. When Facebook surpasses it half billionth member registrations, in urban city it's hard to find someone who still dont have a Facebook account. From student, unemployment, and professional worker, all have their account.
Not only facebook, there are also Twitter, four-square, and some giant-backed service like Yahoo's 360, and koprol, Google's buzz which try to get user's trust to publish their social-personal voices. Fact I found, not all of us can measure the risk of posting personal information (including status, photograph, and video) to a service.
From my personal observation and experience, I'd like to share some tips to be a wise user, as well as protect our privacy :
1. Create account for intended use only.
If you just want to be a normal person, then just add your real world friend as your connection. If you're a really famous public figure (at least you thought of), then best advise is create a separate account just for it, where you can add whoever as your friend. I'm not a close person, but doubt the meaning of a friend for those who have thousands of "friends". Friend is supposed both way, isnt it ?
2. Don't say things you might regret it.
Never post or stand on an opinion that you think you might regret it in the future or blocking your professional way. Quoted from some reading that Internet never forget things, thanks to web crawlers and archive capability.
3. Never over-post your family
People just like to share, but never share or post photo, video and status about your children in your public account. If you just cant help yourself of posting it, create a dedicate account from them. Add only some close friend. No point to show of to your friend where or what you and your family is doing to anonymous.
4. Check it out as you are a stranger
Check privacy setting regularly and check your "wall" and posted item as anonymous. If still accessible, change setting or instead remove it immediately. Sometime I feel like people are more open even to their virtual stranger friend than to real world friend instead. Next time, when going to post a bit, hope you can be wiser to think of the risk.
This entry is inspired by Iman "Sapi". Thank you sapi.
PHP has become not just web scripting language. Now PHP also widely use for simple server side shell scripting. PHP is proven a strong platform do perform database and www operation, such as querying, CURL-ing, http tunnelling and API's function.
The differences is at output and how long the script allowed to runs. Output of web-based PHP mostly markup languages bounded with fancy images and media files. But shell scripting only output only-God-knows log messages, and has no time limit.
Supported by enormous of active developer, PHP server scripting are very easy to those actively build applications under web. PHP also powerful to build heavy-duty task, such as file backup, backend server-to-server processes. Like Java, PHP5 now has the capability for multithreading, to increase processing speed. The only limit is memory and processor. But I found for doing certain task (my case) it's much lighter than using Java.
To enable, first make sure you've installed pcntl extension. On Ubuntu machine, install the extension files :
$ sudo apt-get install php5-dev
$ cd ~
$ mkdir php-temp
$ cd php-temp
$ sudo apt-get source php5
$ cd php5-xx.xx/ext/pcntl (xx.xx is your PHP5 subversion, pressing tab would reveal it)
$ sudo phpize
$ sudo ./configure
$ sudo make
Copy the compiled extension into modules library.
$ cp modules/* /usr/lib/php5/xxxxxx/ (xxxxx is php library date)
Restart apache
$ sudo /etc/init.d/apache2 restart
Next is, try copy and paste this simple script simulate the multithreading.
Further reading, please visit PHP official manual page. Happy multi-threading.
$children = 5;
for ($i=1; $i<=$children; $i++) {
$pid = pcntl_fork();
if ($pid == -1) {
SaveLog("THREADING","could not fork thread $i");
die("could not fork\n");
}
else if ($pid) {
# If we are the parent, we did our job of giving birth,
# now lets finish our job and die!
SaveLog("THREADING","Parent thread exiting..");
exit(0);
}
else {
# Since we are the child, fork so that init will become our parent. Init
# is good at wait()ing on children - ie: reaping.
$cpid = pcntl_fork();
if ($cpid == -1) {
SaveLog("THREADING","could not fork in child process $i");
die("could not fork in child process\n");
}
if (!$cpid) {
# Put your real task here, dont forget they're run as separate process, make sure no dependency each thread
SaveLog("THREADING","Thread $i started");
$result = StupidTask(10000000);
SaveLog("TASK","Result on thread $i : $result");
SaveLog("THREADING","Thread $i finished");
# Don't forget to exit after the child processing is done. Certainly
# change this exit code if you need to however.
exit(0);
}
}
}
function StupidTask($count) {
for ($i=1;$i<$count;$i++) {
}
return "I'm done doing stupid thing for $count times";
}
function SaveLog($type,$msg) {
global $logfile;
file_put_contents($logfile,date('Y-m-d H:i:s') . ' ' . $type . ' ' . $msg . "\n",FILE_APPEND);
return true;
}
