404 page not found setting in codeigniter

If you have to set 404 page not found in your application and you are using php codeigniter  framework
you need to open application/config/routes.php  file and set the following setting

$route['404_override'] = 'not_found/index/';

In above statement not_found is the controller and index is the function in that controller.

-------------------------------------------------------------------

If you are not using any type of php framework or codeigniter , then you must have to create,configured and setup the page not found setting manually.

Create a file page_not_found.php for page not found option and save it.

Now, you have to put some setting lines into your .htaccess file
If this file is already present, then you have to modified it  and append following lines and save it.


RewriteEngine on
ErrorDocument 404 http://localhost/webapp/page_not_found.php

password protected folder on Apache with the help of .htaccess and .htpasswd file

.htpasswd file
The following code will be include in your .htpasswd

Admin:prplaCMT5hYjo

This is your login credential while browsing that directory. The password is encrypted with md5

Upload this file in that directory you want to password protect.

.htaccess
The following code will be include in your .htaccess

AuthType Basic
AuthName "restricted area"
AuthUserFile /home/path/public_html/dir_name/.htpasswd
require valid-user

Upload this file in that directory you want to password protect.

PHP setting for oracle 11g Express Edition Database

After installing Oracle Database 11g Express Edition , you must need to do some PHP setting to connect and used the oracle database.
You need to enable the oci8_11g package for that. For this you may open your php.ini configuration file and find the extension=php_oci8_11g.dll
You may find following block of code like this

extension=php_mysql.dll
extension=php_mysqli.dll
;extension=php_oci8.dll      ; Use with Oracle 10gR2 Instant Client
;extension=php_oci8_11g.dll  ; Use with Oracle 11gR2 Instant Client
;extension=php_openssl.dll
;extension=php_pdo_firebird.dll
extension=php_pdo_mysql.dll

You just need to remove semicolon (;) from the begining of the extension=php_oci8_11g.dll  statement. Then restart all services and check it in your phpinfo.

Now, You can connect the database the sample code is as follows.

<?php

// Create connection to Oracle
$conn = oci_connect("user1", "password",  'localhost');

if (!$conn)
{
   $m = oci_error();
   echo $m['message'], "\n";
   exit;
}
else
{
   print "Connected to Oracle!";
}

$Rs = oci_parse($conn, 'select * from emp_master');
oci_execute($Rs);
echo "<pre>\n";

while (($row = oci_fetch_assoc($Rs)))
{
   print_r($row) ;
}

// Close the Oracle connection
oci_close($conn);
?>

How to change Apache port

The default port of Apache & IIS is 80. If you need to change your apache port. You may need to do small changes in your Apache setting file.

Open your httpd.conf file

IF you have Xampp then below path help you to find conf file

D:\xampp\apache\conf

IF you have wamp then below path help you to find conf file

D:\wamp\bin\apache\Apache2.2.21

In the file, find the line Listen 80 and change the port as per your need.

It like this

#Listen 0.0.0.0:80

#Listen [::]:80

Listen 80

Save the conf file and restart the server.

Apache installation on ubuntu

How to install Apache on ubuntu
Please enter the following command into your terminal prompt.

sudo apt-get install apache2

Command for restart the Apache
sudo service apache2 restart
OR 
sudo /etc/init.d/apache2 restart

Command for start the Apache
sudo /etc/init.d/apache2 start

Command for stop the Apache
sudo /etc/init.d/apache2 stop


Installation of php on ubuntu

sudo apt-get install php5

-----------------------

mysql
----------------------


sudo service mysql start

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htmlentities & htmlspecialchars in php

htmlentities 

Convert all applicable characters to HTML entities

$str = "A 'quote' is <b>bold</b>";

Example
echo htmlentities($str);
// Outputs: A 'quote' is &lt;b&gt;bold&lt;/b&gt;



htmlspecialchars 

Convert special characters to HTML entities

'&' (ampersand) becomes '&amp;' 
'<' (less than) becomes '&lt;' 

Example
$new = htmlspecialchars("<a href='test'>Test</a>", ENT_QUOTES);
echo $new; //Outputs:  &lt;a href=&#039;test&#039;&gt;Test&lt;/a&gt;