Procedural to OOP
Posted on
16th Feb 2014 07:03 pm by
admin
John Kleijn said that to avoid writing "crappy code", we should learn OOP and common OO principles. I've started reading OOP tutorials including the design patterns. And John is right, this is not an easy task. It's a shame because I'm finding it hard to absorb the tutorials.
Is it ok if I'll show you some of my procedural codes and you'll show me how to code some of its parts in OOP? I learn faster by playing with relevant codes. I hope it's ok with you guys.
Basically, all my php files look like this:
Code: ini_set('display_errors', 1);
error_reporting(E_ALL & ~E_NOTICE);
include("fxns.php");
define('TITLE', 'Page Title');
session_start();
if(isset($_SESSION['user_id'])) {
if (validate_user() == true) {
print_header(TITLE); // echos html codes
print_navs(); // echos html codes
//contents here
// calling more functions here
print_footer();
}
} else {
header('Location: login.php');
}
and my fxns.php would look like this:
Code: include("connect.php");
function validate_user() {
$sql = "SELECT uo.ip_address, uo.session_id, uo.user_agent, uo.activity
FROM users_online uo, users u
WHERE uo.user_id='$_SESSION[user_id]' AND uo.user_id=u.user_id";
$res = mysql_query($sql); $row = mysql_fetch_array($res);
$ip_address = $row[0];
$session_id = $row[1];
$user_agent = $row[2];
$activity = $row[3];
$res2 = mysql_query("SELECT config_value FROM config WHERE config_name='inactivity'");
$row2 = mysql_fetch_array($res2); $inactivity = $row2[0];
$res3 = mysql_query("SELECT locked, invalid_ip FROM users WHERE user_id='{$_SESSION[user_id]}'");
$row3 = mysql_fetch_array($res3); $locked = $row3[0]; $invalid_ip = $row3[1];
// verify user's IP address
if($ip_address != $_SERVER['REMOTE_ADDR']) {
show_invalid_ip($_SERVER['REMOTE_ADDR']); // echo some HTML
}
// verify if the the session id and user's session id are the same
elseif ($session_id != session_id()) {
show_invalid_sid(); // echo some HTML
}
// verify if the browser software is the same
elseif($user_agent != $_SERVER['HTTP_USER_AGENT']) {
show_invalid_user_agent(); // echo some HTML
}
// verify if the user is locked
elseif ($locked == 1) {
show_locked($invalid_ip); // echo some HTML
}
// verify if the user has been inactive for $inactivity mins
elseif( time() > ( $activity + ($inactivity * 60) ) ) {
show_s_expired($inactivity); // echo some HTML
} else {
update_user();
return true;
}
}
function update_user() {
$maxtime = time() - 1800;
mysql_query("UPDATE users_online SET refurl='{$_SERVER['HTTP_REFERER']}' WHERE user_id='$_SESSION[user_id]'");
mysql_query("UPDATE users_online SET activity='".time()."' WHERE user_id='$_SESSION[user_id]'");
mysql_query("DELETE FROM users_online WHERE activity < '$maxtime'");
}
Would you be kind to write some of its part in OOP? Thanks so much.
No comments posted yet
Your Answer:
Login to answer
285 
42 
Other forums
how to load a Sys file with system load and call images?
normally you need register the module as a service with CreateService, and start the service
Form help: Syntax & Logic
Hello again all,
I'm working on a form and ran into a wall (again) and can't seem to think th
is_dir() problem
Hello,
I'm buidling a php scripts that dynamically get's subfolders from a specific folder.updating a single value to multiple non consecutive rows
I need to update the same value to multiple non consecutive rows. I need to add an experation date t
Upload file!
Ok i have a form..
Code: <form name="form1" method="post" action=&quo
How to use Ajax to verify data on a DB ?
Hello everyone, well i want to know how to check a value if it exists or not on a Data base and capt
How do i use vars in an array
Hiya peeps!
How do I use a var in an array. You will see $id but it isnt working.
need help with date function
i have following form for date
Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01
Database/Table Collation
What is the Database, and table collations used for? i don't understand what there used for since co
Help on query replacing the date
Hi Pals,
i want to replace the current date in a column to some value say C or D or any n
