Sourav's Blog

Codeigniter Image Manupulation Example

Create a folder “uploaded” where your “application” folder is. (Not inside “application” folder”). Create a sub folder “thumbs” inside “uploaded”. Put a font in system/fonts/arial.ttf (copy the font from your windows).

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Imagetest extends CI_Controller {
	function __construct() {
		parent::__construct();
		$this->load->helper('url');
	}
	function index() {
		$path = realpath(APPPATH . '../uploaded');
		$file = "asd.jpg";

$path = str_replace('\\','/',$path);
		$config = array(
			'source_image' => $path.'/'.$file,
			'new_image' => $path.'/thumbs/'.$file,
			'maintain_ration' => true,
			'width' => 150,
			'height' => 100,
			'x_axis' => '100',
			'y_axis' => '40',
			'rotation_angle' => '180',
			'wm_text'		=> 'Test asdfsda sa dsa dsa dsa a',
			'wm_type'		=> 'text',
			'wm_font_path'		=> 'system/fonts/arial.ttf',
			'wm_font_size'		=> '30',
			'wm_font_color'		=> 'FF0000',
			'wm_vrt_alignment'		=> 'bottom',
			'wm_hor_alignment'		=> 'center',
			'wm_padding'		=> '10'

		);
		print "<pre>";
		print_r($config);
		$this->load->library('image_lib', $config);

		//$this->image_lib->crop();
		//$this->image_lib->clear();
		$this->image_lib->resize();
		/*$this->image_lib->rotate();
		$this->image_lib->clear();
		if(!$this->image_lib->watermark()) {
			echo $this->image_lib->display_errors();
		}	*/
		$this->load->view('imagetest');
	}
}

PHP curl. Simple curl script

Using curl we can get the output content of a given url.

$URL = "http://google.com";
	$curl = curl_init();
	curl_setopt ($curl, CURLOPT_URL, $URL);
	curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
	$result = curl_exec ($curl);
	curl_close ($curl);
echo $result;

PHP preg_match_all to remove a part of a text.

<?php
echo $text = "This test [CONFIRMLINK] is working fine [/CONFIRMLINK] for preg_match_all";

preg_match_all('|\[CONFIRMLINK\](.*)\[\/CONFIRMLINK\]|', $text, $text1);

$text1_val = $text1[1][0];
$text = str_replace($text1_val,'',$text);
$text = str_replace("[CONFIRMLINK]",'',$text);
$text = str_replace("[/CONFIRMLINK]",'',$text);

echo "<br/>";
echo $text;
?>

PHP Class Example

Create a simple class.

<?php
class validateClass
{
public function validatePass($pass,$pass1)
{
if($pass=='' || $pass1=='')
return("Enter in Both Pasword Fields.<br/>");
else
if($pass!=$pass1)
return "Two Passwords Are Not Same.<br/>";
}//End function
}//End class

$validate = new validateClass; //creating object of this class
$validate->validateName("abc","abc"); //calling the funtion
/* If passwords(the two parameter) are same it returns true else return false
*/
?>

Introduction

PHP – Personal Home Pages

Php: Hypertext Preprocessor.

* PHP is a server-side scripting language, like ASP
* PHP scripts are executed on the server
* PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.)
* PHP is an open source software
* PHP is free to download and us. You can download it from: http://www.php.net
* Download MySQL for free here:http://www.mysql.com/downloads/index.html
* Download Apache for free here: http://httpd.apache.org/download.cgi
* Or you can install XAMPP. It  is a very easy to install Apache Distribution for Linux, Solaris, Windows and Mac OS X. The package includes the Apache web server, MySQL, PHP, Perl, a FTP server and phpMyAdmin. Download XAMPP (for Linux, Windows, Mac Os X & Solaris) from here:http://www.apachefriends.org/en/xampp.html

http://sourceforge.net/projects/xampp/

It is easy to install. Installation guide is given here (http://www.apachefriends.org/en/xampp.html) for different Operating System.

XAMPP package is better to download & install.

* PHP files can contain text, HTML tags and scripts
* PHP files are returned to the browser as plain HTML
* PHP files have a file extension of “.php”, “.php3″, or “.phtml”

MySQL:

* MySQL is a database server
* MySQL is ideal for both small and large applications
* MySQL supports standard SQL
* MySQL compiles on a number of platforms
* MySQL is free to download and use. It is included in XAMPP package.
* PHP combined with MySQL are cross-platform (you can develop in Windows and serve on a Unix platform)

PHP because:

* PHP runs on different platforms (Windows, Linux, Unix, etc.)
* PHP is compatible with almost all servers used today (Apache, IIS, etc.)
* PHP is FREE to download from the official PHP resource: www.php.net
* PHP is easy to learn and runs efficiently on the server side

Start Learning PHP

PHP documentation is available here: http://www.php.net/download-docs.php. Get help from http://www.w3schools.com/php
PHP Syntax

<?php

// code

?>

A PHP scripting block always starts with <?php and ends with ?>. A PHP scripting block can be placed anywhere in the document.

On servers with shorthand support enabled you can start a scripting block with .

For maximum compatibility, we recommend that you use the standard form (<?php) rather than the shorthand form.
1st PHP program-
<html>
<body>
<?php
echo “Hello World”;
?>
</body>
</html>
PHP Comments-

In PHP, we use // to make a single-line comment or /* and */ to make a large comment block
<?php
// php statement terminates with a semicolon(;).
/*We can use
echo or print
to display the output*/
echo “Hello World”;
print “Hello World”;
?>
PHP Variables:

All variables in PHP start with a $ sign symbol.
Syntax: $a=”Hello World!”;
$a=16;
PHP is a Loosely Typed Language

In PHP, a variable does not need to be declared before adding a value to it.
In the example above, you see that you do not have to tell PHP which data type the variable is.
PHP automatically converts the variable to the correct data type, depending on its value.
In a strongly typed programming language, you have to declare (define) the type and name of the variable before using it.
In PHP, the variable is declared automatically when you use it.

Variable Naming Rule:

* A variable name must start with a letter or an underscore “_”
* A variable name can only contain alpha-numeric characters and underscores (a-z, A-Z, 0-9, and _ )
* A variable name should not contain spaces. If a variable name is more than one word, it should be separated with an underscore ($my_string), or with capitalization ($myString)

The Concatenation Operator:

PHP has only one Concatenation operator. That is dot(.).
<?php
$txt1=”Hello World!”;
$txt2=”What a nice day!”;
echo $txt1 . ” ” . $txt2;
?>

Output will be: Hello World! What a nice day!
phpinfo:

phpinfo

This outputs a large amount of information about the current state of PHP. This includes information about PHP compilation options and extensions, the PHP version, server information and environment (if compiled as a module), the PHP environment, OS version information, paths, master and local values of configuration options, HTTP headers, and the PHP License.

Because every system is setup differently, phpinfo() is commonly used to check configuration settings and for available predefined variables on a given system.
<?php
// Show all information, defaults to INFO_ALL
phpinfo();
// Show just the module information.
// phpinfo(8) yields identical results.
phpinfo(INFO_MODULES);
?>