Recaptcha basic php class

See Demo
@ PhpClasses.org

<?php
/*
 *	Easy Recaptcha : Basic class
 *	Abdelkader ELKALIDI | contact@updel.com
 *	More infos : https://www.google.com/recaptcha
 */
class Recaptcha{
	public 		$theme		=	'clean';
	public 		$lang		=	'en';
	public		$publicKey;
	public 		$privateKey;
	public 		$messages	=	array(
									'invalid-site-private-key'	=>	'We weren\'t able to verify the private key.',
									'invalid-request-cookie'	=>	'The challenge parameter of the verify script was incorrect.',
									'incorrect-captcha-sol'		=>	'The CAPTCHA solution was incorrect.',
									'recaptcha-not-reachable'	=>	'reCAPTCHA never returns this error code. A plugin should manually return this code in the unlikely event that it is unable to contact the reCAPTCHA verify server.',
								);
	protected 	$error;
	protected 	$recaptchaServer 		= 	'http://www.google.com/recaptcha/api';
	protected 	$recaptchaSslServer 	= 	'https://www.google.com/recaptcha/api';
	protected 	$recaptchaCheckServer 	= 	'http://www.google.com/recaptcha/api/verify';

	/*
	 *	Nothing
	 */
	function __construct(){
	}

	/*
	 *	Debugger
	 */
	public function getError() {
		return !empty($this->error)	? $this->messages[$this->error] : false;
	}

	/*
	 *	Get Recaptcha
	 */
	public function getCaptcha($ssl = 0){
		$server	=	($ssl)	?	$this->recaptchaSslServer	:	$this->recaptchaServer;
		$error	=	(!$this->getError()) ? null : "&amp;error=" . $this->getError();
		$html	=	'
		<script type= "text/javascript">
			var RecaptchaOptions = {theme: \''.$this->theme.'\', lang : \''.$this->lang.'\'	};
		</script>
		<script type="text/javascript" src="'.$server.'/challenge?k='.$this->publicKey.$error.'"></script><noscript><iframe src="'.$server.'/noscript?k='.$this->publicKey.$error.'" height="300" width="500" frameborder="0"></iframe><br /><textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea><input type="hidden" name="recaptcha_response_field" value="manual_challenge"/></noscript>';
		return	$html;
	}

	/*
	 *	Check Recaptcha
	 */
	public function checkCaptcha(){
        $data 	= 	$this->getBySocket(
								$this->recaptchaCheckServer,
								array (
									'privatekey'	=> 	$this->privateKey,
									'remoteip'		=> 	$_SERVER["REMOTE_ADDR"],
									'challenge'		=> 	$_POST['recaptcha_challenge_field'],
									'response'		=> 	$_POST['recaptcha_response_field'],
								)
							);

        $array 			= 	explode("\n", $data);
		$this->error 	= 	(trim($array[0]) == 'false') ? trim($array[1]) : null;
	}

	/*
	 *	Send Data using Sockets
	 */
	private function getBySocket($url, $data) {
		$data		=	$this->concatData($data);
		$post	 	= 	curl_init();
		curl_setopt($post, CURLOPT_URL, $url);
		curl_setopt($post, CURLOPT_USERAGENT, $data);
		curl_setopt($post, CURLOPT_POST, 1);
		curl_setopt($post, CURLOPT_POSTFIELDS,$data);
		curl_setopt($post, CURLOPT_RETURNTRANSFER, 1);
		$response = curl_exec($post);
		curl_close($post);
		return $response;
	}

	/*
	 *	Concat Data
	 */
	private function concatData($data) {
		if(is_array($data)){
			foreach ($data as $key => $value){
				$var[]	= $key."=".$value;
			}
			return implode("&",$var);
		}
		else{
			return $data;
		}
	}
}

Example :

<form method="post" action="">
<?php
    require 'recaptcha.class.php';

    $captcha    =    new Recaptcha;
    $captcha->publicKey        =    'your public API key';
    $captcha->privateKey    =    'your private API key';

    if(isset($_POST) AND !empty($_POST)){
        $captcha->checkCaptcha();
        $debug    =    $captcha->getError();
        if(!$debug){
            echo 'All right';
        }
        else{
            echo $debug;
        }
    }

    echo $captcha->getCaptcha();
?>
<input type="submit" value="Check captcha" />
</form>

Zend Framework : Modular Application [Part 1]

Project description : A simple guestbook module using Zend Framework 1.11 .

Project

Create new project using Zend_Tool :

zf create project MyApp
cd MyApp

Create module :

zf create module Guestbook

Create controller for Guestbook (1 = index action included):

zf create controller Index 1 Guestbook

Now go to /MyApp/application/configs/application.ini and comment/delete the line :

;resources.frontController.controllerDirectory = APPLICATION_PATH "/controllers"

Then add the lines

;Modular suport
resources.frontController.moduleDirectory = APPLICATION_PATH "/modules"
resources.modules[] =

And add this lines to set Guestbook as default module

resources.frontController.params.prefixDefaultModule = "1"
resources.frontController.defaultModule = "Guestbook"

Create php file “Bootstrap.php” under folder /MyApp/application/modules/Guestbook and past the code

<?php
class Guestbook_Bootstrap extends Zend_Application_Module_Bootstrap{}

Now test your app

Read the rest of this entry »

Check if “is digits” and does not begin with zero

Protecting Your PHP/SQL Queries from SQL Injection is one of coding obligations, if you have tables with AUTO_INCREMENT and you want to check IDs before running queries, this function is yours.

function is_digits($string){
	return preg_match("!^[1-9]([0-9]+)?$!",$string);
}

Examples :

is_digits(0); // Return 0
is_digits(1); // Return 1
is_digits("1"); // Return 1
is_digits(01); // Return 0
is_digits(-1); // Return 0
is_digits("1a"); // Return 0
is_digits("a1"); // Return 0
is_digits(15); // Return 1
is_digits(1,5); // Return 0
is_digits(1.5); // Return 0

Mysql FIND_IN_SET()

FIND_IN_SET() : A function that I discovered some years ago and which I find very impressive if you’re addicted to query optimization.
This function is a bit like in_array() but is doing research in StringList separated by commas “,”

Here is an example to understand:

Table : Clubs

Table : Leagues

To select leagues which participates BARCA (having id 11), SQL code would look like this :

SELECT    league_id,name
FROM      Leagues
WHERE     FIND_IN_SET(11, clubs_id)

Create a new directory having 0777 permissions

I need to create unique directory for every new member, which will be used to store their pictures. I’ve tried :

mkdir("user_name", 0777);

I got : mkdir() [function.mkdir]: Permission denied

It work when I chmod parent directory but can not give permissions “0777”, therefore I add umask()

umask(000);
mkdir("user_name", 0777);

Eurêka BUT ! the new folder is now owned by mr apache

Now imagine that we want to create a subfolder like “user_name/gallery” ! we will get an error like :

Warning: mkdir() [function.mkdir]: SAFE MODE Restriction in effect. The script whose uid is XXX is not allowed to access /var/www/vhosts/updel.com/httpdocs/test/test owned by uid 48 in /var/www/vhosts/updel.com/httpdocs/test.php on line 4

It mean we do not have permission to touch a directory owned by another user !!!!!!!!

The solution : FORGET mkdir() and through ftp using PHP, the code look like this

$connexion_ftp = ftp_connect("Ftp_url"); //Connexion ftp
ftp_login($connexion_ftp, "Ftp_login", "Ftp_Password");
ftp_mkdir($connexion_ftp, "new_dir"); // user_name in my case
ftp_site($connexion_ftp,"CHMOD 777 new_dir");

Thumbnail Drag then Crop like facebook using mootools

I like facebook profile code, when you upload picture you can drag and drop it inside a small box, to get a thumbnail showing the good part of the picture.

It’s very easy to do it using mootools core and mootools Drag plugin

Click here to see demo
Read the rest of this entry »

PHP cli progress Bar

This is a simple trick to make your PHP console application more funny

Read the rest of this entry »