Kohana 3 Name Spacing with Underscores in Controller Classes

So, I’ve been working with Kohana 2.3.4 lately and its absolutely beautiful. A much improved version of what Codeigniter should have been. Now they released Kohana 3 which is similar, yet very different. One of the “gotchas” I noticed in KO3 (Kohana 3) is the auto loading of controller classes and the name spacing with underscores. Here is an example of what I’m talking about.

All underscores are converted to slashes

In Kohana 2 you could name a class with underscores and there would be no problem

now the underscores are converted to slashes

notice the Controller_ is in the front now which translates to controller/

Within the classes folder in application you notice there is classes/controllers to keep for instance a file extending off template.

So a template in controllers would need to be named defaulttemplate.php which would become Controller_DefaultTemplate, BUT if you wanted it to be Controller_Default_Template it would have to be in a sub folder called Default in controllers then template.php

Its a bit confusing in the beginning but you’ll get used to it. The entire system is a helluva improvement. Look forward to a few articles i’ll be writing on using the ORM.

Cheers,
-Wes

Calculate Kaprekar’s Constant in PHP with Math

This is just a bullshit post, not practical at all, but math is good shit and I decided to make this for fun in 30 minutes… If you are unfamiliar with Kaprekar’s Constant.. well the breakdown is as follows..

Take any four digit number (whose digits are not all identical), and follow the steps:

1. Arrange the string of digits to form the largest and smallest 4 digit numbers possible that are not identical.
2. Arrange them ascending and descending.. so if your number is 3758, you get 8753 and 3578
3. Take these two numbers and subtract the smaller number from the larger. (8753-3578)
4. Repeat the process until you get 6174..from 6174 it will stay 6174..fucking neat.

Tip:If there is a 0, 5032 for example its not 532-235, its 5320 – 0235.

DEMO:

HTML

<h1>Kaprekar's Constant</h1>
<h2>Directions:</h2>
<p>Enter a 4-digit number that are not all the same digits and watch Kaprekar's Constant turn into 6174.</p>
<form method="POST" >
<input type="text" size="30" name="number" />
<input type="submit" value="Calculate" />
</form>

PHP

//Check if the number is there and Trim whitespace
if (isset($_POST['number'])) {
	$number = trim($_POST['number']);

	//Run the function
	kaprekars($number);
}

function kaprekars($number) {

	//Not set? Let them know.
	if ((empty($number)) &&  (isset($number)))  {
		$errors[] = 'Make sure you enter something.';
	}

	//Not numeric? Let them know.
	if (!is_numeric($number)) {
		$errors[] = 'Make sure its a number.';
	}
	//Not 4 digits? Let them know.
	if ((strlen($number) < 4) || (strlen($number) > 4)) {
		$errors[] = 'Make sure its 4 digits.';

	}
	//If its 4 digits it cant be 1111 or 8888, let them know.

	//Define the arrays, because if you loop and its empty.. the variable doesnt get set, just an error
	$forwards 	= array();
	$backwards 	= array();

	//loopz
	for ($i=0; $i<strlen($number); $i++) {

		//Make an array of the numbers
		$forwards[$i] = substr($number,$i, 1);
	}
	//Reverse it
	$backwards = array_reverse($forwards);

	//Comepare...are they the same? YES, fucking error bitch.
	if ($forwards == $backwards) {
		$errors[] = 'The value must not be four of the same digit.';
	}

	//Errors array set?
	if (isset($errors)) {

		//YES, so loop through and output them.
		echo '<ul id="errors">';

		foreach ($errors as $k => $v) {
			echo '<li class="errors_text">' . $v . '</li>';
		}

		echo '</li>';

		die();

	} else {

		//make sure the number is not 6174
		while ($number != "6174") {

			//IF its 3 digits like 333 append a 0 in front of it
			if (strlen($number) == 3) {
				$number = '0' . $number;
			}

			//loop through the length of the sum which is always 4
			for ($i=0; $i<strlen($number); $i++) {

				//Create an array called combined based on $i which is 0 to 3 aka 4 by 1
				// e.g. $combined = array(6,1,7,4);
				$combined[$i] = substr($number,$i, 1);
			}

			//sort the array ascending 1467
			sort($combined);
			$asc = implode("",$combined);

			//now descending 7641<br>

			rsort($combined);
			$desc = implode("",$combined);

			//subtract it to get the next number until you hit Kaprekars constant 6174
			$number = $desc - $asc;

			//Output it.
			echo $desc . ' - ' . $asc . ' = ' . $number . '<br />';
		}
	}
}

Remove Non Ascii Characters using PHP and Regular Expressions

So there I was taking forever to fix content from a Word Perfect document converted to Word then pasted as HTML. I was spending a while removing all the bullshit non Ascii Characters and I thought to myself and said…Wes, you idiot, you are a programmer, do this the right way and filter it out. So I did and here is a simple way of doing it through regular expressions and php.

<?php
//Your nasty string of word and non ascii chars
$Contentz = "These are shitty chars „ and we dont like them nor want them.";

//Array of content I want to make a space
$badContent = array("&nbsp;");

//Replace the bad arrays with a space
$Contentz = trim(str_replace($badContent," ",$Contentz));

//Specific string replaces for ellipsis, etc that you dont want removed but replaced
$theBad = 	array("“","”","‘","’","…","—","–");
$theGood = array("\"","\"","'","'","...","-","-");
$Contentz = str_replace($theBad,$theGood,$Contentz);

//Whatever might be left over...
//Remove all non ascii chars (aka: bad Microsoft Word and Word Perfect Shit shit)
$Contentz = preg_replace('/[^(\x20-\x7F)\x0A]*/','', $Contentz);

echo $Contentz;
?>

$Contentz will show up removing the characters.

Cheers,
Wes S .Ray

Configuring PHP Web server on Fedora 11

This is going to be a quick and simple tutorial on how to setup a Fedora 11 Linux Server with PHP, MySQL, Apache and phpmyadmin. Now I’m assuming you already have the OS installed on your machine. Most of you will be using cloud servers, mine is from Linode.com. You will need to have shell access to your server. If you have very little experience with linux I suggest you brush up and learn a little syntax so you aren’t shooting in the dark.

Ok, so lets get started with the actual configuration of the server. At this point I AM ASSUMING you have the operating system installed and its just a bare canvas.

Here we go, hold on kids.

The first step that is needed to taken is open up your terminal, I personally use PuTTY, a free telnet/ssh client. One you are logged in make sure you have full access to the system, whether it be root or sudo.

Now lets install PHP and MySQL. These will be commands you type in the terminal.  We will be installing the apache, mysql and php and configuring them.

• yum -y install httpd php mysql mysql-server php-mysql

We set chkconfig so that when rebooted the servers will start automatically, and we do this like so.

• chkconfig httpd on
• chkconfig mysqld on

Now that Apache and MySQL are starting with the server, we can configure MySQL

• mysqladmin -u root ‘root_pw_of_your_choice’

Now lets install phpMyAdmin, a mysql database management tool.

• yum install phpMyAdmin.noarch

Since that has been taken care of let, lets open up the phpmyadmin config.

• nano /etc/httpd/conf.d/phpMyAdmin.conf

At this point what we need to do is comment out a certain section. Notice that I have a # which denotes comment out

#<Directory /usr/share/phpMyAdmin/>
#   order deny,allow
#   deny from all
#   allow from 127.0.0.1
#</Directory>

Next we are going to jump into the httpd.conf, otherwise known as the Apache Config File

• nano /etc/httpd/conf/httpd.conf

Once in there you are going to want to change a section

<Directory />
Options FollowSymLinks
AllowOverride All
</Directory>

You will want to set it to AllowOverride All, by default it should be set to none, but we dont want that.

Now at the end of the file add these to make your IP address directly or URL go directly to phpMyAdmin unless you set a virtualhost otherwise.  You need to put all of this at the bottom of your httpd.conf file

<VirtualHost your.ip:80>
ServerAdmin youremail@server.com
DocumentRoot /usr/share/phpMyAdmin/

ServerName yourIP
ServerAlias yourIP

ErrorLog logs/home-error_log
CustomLog logs/home-access_log common
</VirtualHost>

Include /etc/httpd/conf/sites-production/*
Include /etc/httpd/conf/sites-development/*

Save and close the conf file and finally create your folders than you included, e.g

• mkdir /etc/httpd/conf/sites-production
• mkdir /etc/httpd/conf/sites-development

Now that the config file directories are made, lets make the place holders for the actual website content

• /var/www/sites-production
• /var/www/sites-development

That about sums it up for the base server setup on fedora 11 for a linode VPS.  If you want more PHP Packages just run this command and you should have everything you need.

yum install php php-devel php-gd php-imap php-ldap php-mysql php-odbc php-pear php-xml php-xmlrpc php-eaccelerator php-magickwand php-magpierss php-mapserver php-mbstring php-mcrypt php-mhash php-mssql php-shout php-snmp php-soap php-tidy curl curl-devel perl-libwww-perl ImageMagick libxml2 libxml2-devel

If you need any MySQL help for setting up users, I reccomend this site

http://www.databasef1.com/tutorial/mysql-create-user.html

If any help is needed feel free to leave comments and I will respond.  Good luck!

Feeling Generous??

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My Linode.com Referral Code 2bf9ae77ecd8e759a2b79bf1011e1c3147d93525

-Wes