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 transport the Query and insfoset
Hi
I have created the query using SQ01........
How to created T-code for query..
extending tidy
I have problem with type-hinting and extending tidy. This code creates error:
Code: class cMyTidy
mysql timestamp manipulation
How could I use a timestamp (e.g 2009-10-30 13:20:35 ), and with php find out if it is:
from
Cron Job and Output
I have php codes running under a cron job.
But everytime i output (echo) , it comes out as comple
Can't seem to capture a variable in a chained select
I'm *this* close to having a chained select running but for some reason it doesn't seem to be pickin
need help in update query
hi
i have a dynamic form. i need help in how can i use update query when values from dynamic for
Get content from table into a list, without repeating.
Alright this is kinda an odd thing, so I need some help.
I have a table "quote" wit
PHP XML extraction text
I would like to extract an xml text and have that text directly echo(print) out on my web page. Her
Registration
ok so i have a site where people can register and login which works now thanks to someone on here th
Appending GET data with form submition
Okay, what I'm trying to do is to use a form to append an already existing GET data string.
I