Well, here I am with a very basic example. There are a lot of methods but this is the one I’m using.

Please note that $this->records has to be an array, generated by a fetched query or something like that. Place this script between the <tbody> tags.

$bool = 0;
foreach($this->records as $row):
	echo ($bool++ & 1) ? 'class="even"' : 'class="steven"';
endforeach;

Use this css for example and add it to a <tr> element.

.even {
	background-color: #FFF;
	}

.steven {
	background-color: #F9F9F9;
	}

Step 1

Download the latest release of Upload Class from Colin Verot’s blog.

Step 2

Copy the file class.upload.php to your models directory and rename it to Upload.php

• Sitename
  • application
    • models
      • Upload.php

Step 3

Edit the file Upload.php and change the following line (line 528 in version 0.29)

class upload {

to

class Application_Model_Upload { /* It's in the models directory remember? */

This is it

(It’s 25 June remember? ) To use the class just create a new instance and do the thinghies you did before!

$handle = new Upload($_FILES['my_field']);
	if ($handle->uploaded) {
		/* do thinghies */
	}

If you’d like to read more about uploading files with Zend Framework I can recommend you this tutorial.

Cheers!

In most cases you’ll get the data from a SQL database or something like that and in therefore it’s an array.

/* $arr = array from the database */
$arr = array(//array(id,name),
			 	array(15,'15 inch'),
				array(17,'17 inch'),
				array(19,'19 inch')
			);

Make sure that the you’ll only get the id and the name or another identifier. The total has to be two otherwise it don’t work.

To get the JSON request in the right format I’ve written a small function that will add the value and html key to the arrays.

/**
* Function to set the key for each value
* Requires: array(array())
* Returns: JSON format for cvLinkSelect class
*/
function json_cvLinkSelect($arr = array()){
	$json = array(); /* temporary array */

	foreach($arr as $ob){ /*walk trough the original array */
		$keys = array('value','html'); /*define the two keys */
		array_push($json,array_combine($keys,$ob)); /* push the new array to the temporary array, $json */
	}

	return json_encode($json); /* return the $json array */
}

The output will be:

[{"value":"hard","html":"Hard"},{"value":"soft","html":"Soft"}]

I’ve updated the zipfile with the working example if you guys need more info.

Enjoy!

http://mysite.com/mypage/?myvar=test

rewriting to

http://mysite.com/mypage/test

After a long search on the WordPress forums and the whole internet I’ve found this topic: using an extra parameter in an URL but it wasn’t very sufficient in my opinion. So that’s why I’ll explain the use of multiple parameters in the url.

One $_GET variable

function add_mypage_var($public_query_vars) {
$public_query_vars[] = 'myvar1';
return $public_query_vars;
}

//add a rewrite rule
function do_rewrite_mypage() {
add_rewrite_rule('brands/([^/]+)/?$', 'index.php?pagename=mypage&myvar1=$matches[1]','top');
}

add_filter('query_vars', 'add_mypage_var');
add_action('init', 'do_rewrite_brands');

You can use this variable in a plugin like this:

$slug = get_query_var('myvar');

Multiple $_GET variables

There was just one thing that cost me a headache… I’d like to add multiple parameters to the url and this method I just described isn’t sufficient. I’ve checked the basic url rewrite trough mod_rewrite and this method needs several lines to declare all the possible amount of variables in the url. I’ve tried this method also for the url rewrites via WordPress and here we are: a simple working function:

function add_mypage_var($public_query_vars) {
	$public_query_vars[] = 'myvar1';
	$public_query_vars[] = 'myvar2';

	return $public_query_vars;
}

//add a rewrite rule
function do_rewrite_mypage() {
	add_rewrite_rule('brands/([^/]+)/?$', 'index.php?pagename=mypage&myvar1=$matches[1]&myvar2=$matches[2]','top');
	add_rewrite_rule('brands/([^/]+)/?$', 'index.php?pagename=mypage&myvar1=$matches[1]','top');
}

add_filter('query_vars', 'add_mypage_var');
add_action('init', 'do_rewrite_mypage');

You can check all the url rewrites that are used for your WordPress post.

function get_rewrite_urls(){
	global $wp_rewrite;

	return $wp_rewrite->wp_rewrite_rules(); /* Returns an array */
}

print_r(get_rewrite_urls());

flush_rules

You need to flush your rules to install your plugin and make the rewrite work. Also it can be handy to flush the rules during your development phase. So, just detect if the plugin is going to be installed:

register_activation_hook(__FILE__,'do_flush_gear'); /* Place this at the bottom of your plugin file */

And in some cases you’d like to remove all your custom rewrites. Just use this function:

function do_flush_gear{
	global $wp_rewrite;

	$wp_rewrite->flush_rules();
}

View example Download file

Changes

• Multiple GET variables in the request url.
• After a page refresh the script checks if the first linked selectbox option is not empty. If it isn’t empty the first request fires.
• If the request is empty it’s the last item in the linked selectboxes range. In this case we have to fire the isLast function.

Read more about the usage on the original post for the cvLinkSelect class!

Enjoy!

So I decided to write my own Eyedropper. Test it and install it on your own website! You can tweak some events so it has more functionality.

There is also a Zip file available with a working example. Just upload the files to your folder on your webspace and navigate to it!

Example Download Class Download Zip

File structure

The following structure is used in the example and the documentation.

• images
  • your_image.jpg
• js
  • cvMooDrop.js
  • mootools-1.2.js
• ajax_moodrop.php
• basic.css
• cvMooDrop.css
• index.php /*This file contains the html for the eyedropper*/
• moodrop.php

The html

The html is really simple. The path to the image is the relative path.

The css

#dropperid {
	float: left;
	padding: 0px;
	width: 551px; //the width of the image
	height: 157px; //the height of the image
	}

#prev {
	float: left;
	width: 80px;
	height: 80px;
	border: 1px #CCC solid;
	}

The basic javascript

window.addEvent('domready', function() {
	var test1 = new moodrop('dropperid',{
		url: 'ajax_moodrop.php',
		prev_id: 'prev'
	});
});

The more advanced javascript

window.addEvent('domready', function() {
	var test2 = new moodrop('dropperadvanced',{
		url: 'ajax_moodrop.php',
		prev_id: 'prev2',
	});

	var colors = [];

	var addColor = function(c){
		if(colors.contains(c)){
			alert('This color already exists!');
		}else{
			colors.push(c);
			$('colors_field').value = JSON.encode(colors);
			createColor(c);
		}
	}

	var createColor = function(c){
		var box = new Element('span',{	'id': this.hex,
							  			'class': 'box',
										'styles': {
											'background': c,
											'display': 'block',
											'float': 'left',
											'cursor': 'pointer'
											}
										}).inject($('scheme'));
	};

	$('add').addEvent('click',function(a){
		addColor(test2.hex);
	});
});

The php (ajax_moodrop.php)

The AJAX request has several variables in it to get the right pixel, the pixel the dropper is pointing at.

• image: the relative path to the image file
• n: the relative top position of the pixel
• w: the relative left position of the pixel

if(isset($_GET['image'])){
	/* select the left lower pixel from the dropperdiv and get the color index */
	$im = imagecreatefromjpeg($_GET['image']);
	$color_index = imagecolorat($im, $_GET['w'], $_GET['n']);

	/* get rid of the temporary image and display the human readable hex color */
	echo '#'.dechex($color_index);
}

The function imagecreatefrom* can be changed to several functions, depending on the image type you use. In this case I’ve used a very simple static solution but you can select the correct function by checking the mime type.

• imagecreatefromjpeg
• imagecreatefromgif
• imagecreatefrompng

Besides uploading images you can upload all the files that you want, as long you add them to the safe list.

• Samples
• Documentation
• Download

Try it out and you’ll be convinced! More cool stuff based on this script will be shown in the near future!

Cheers!

echo "Hello World\n";
//or
echo "Hello World\r";
//or
echo "Hello World\r\n";

But I don’t like the double quote’s in this notation because when I’m echo html tags into it, I’ll have to escape allt he double quotes. This is why I prefer the following usage.

echo 'Hello World!'.PHP_EOL;

EOL stands for End of Line.

Sometimes the server is running on windows and the EOL tag is this define tag by default. This is the point where a simple hack comes in…

Just put the following line on top of your script:

if(!defined('PHP_EOL')){
	define('PHP_EOL', strtoupper(substr(PHP_OS,0,3) == 'WIN') ? "\r\n" : "\n");
}

Obviously do I know the .htaccess solution to create subdomains. This is very handy if you don’t have cPanel or another web admin tool.

RewriteEngine On

RewriteCond %{HTTP_HOST} !^www\.yoursite\.com
RewriteCond %{HTTP_HOST} ([^.]+)\.yoursite\.com [NC]
RewriteRule ^(.*)$ http://www.yoursite.com/%1 [L,R]

This solution points to a folder in your root so it isn’t a very dynamic one. Lets see the solution!

Apache configuration

First you have to change the Apache configuration to make it by adding the following line to the httppd.conf file (the Apache configuration file).

ServerAlias *.yourdomain.com

Read more about this configuration on the Apache website.

Static subdomains

//array for static subdomains
$subdomains = array(
			'forum',
			'mobile',
			'demos',
			);

$match = preg_replace('#(http://)?(www\.)?(.+?)(\.yourdomain.com){1}#i','\\3', $_SERVER['HTTP_HOST']);

	if(in_array($match, $subdomains)){
		include('/root/yourdomain.com/'.$matc.'/index.php');
	}else{
		//Do normal stuff
	}

Dynamic sub domains

It is also possible to create the array from a database selection. See the following example:

//array for static subdomains
$subdomains = array(
			'forum',
			'mobile',
			'demos',
			);

$match = preg_replace('#(http://)?(www\.)?(.+?)(\.yourdomain.com){1}#i','\\3', $_SERVER['HTTP_HOST']);

	if(in_array($match, $subdomains)){
		include('/root/yourdomain.com/'.$matc.'/index.php');
	}else{
		$sql = "SELECT nickname FROM users WHERE nickname = ".$match;
		$res = mysql_query($sql);
		$rows = mysql_num_rows($res);

		if($rows == 1){
			//pointer to user profile page
			include('/root/yourdomain.com/profiles/index.php);
		}else{
			//Do normall stuff
		}
	}

NOTE!
This is a very basic way of creating subdomains. There are no build in checks or errorhandler. The way of naming your files and choosing a structure is whole yours.

Sessions

When you’re using sessions (a login system for example) the session will be lost you’re browsing to another (sub)domain. You can prevent this by adding the following line to your .htaccess file in the root of your site.

session.cookie_domain = "yourdomain.com"