Code Igniter :- Step by step tutoral

Step 1. Download Codeigniter. click here or copy and paste the url in browser tab.
            http://codeigniter.com/downloads/
Step 2. extract and rename the folder to the name you want to give. if you want to call / access your application like http://localhost/cms then rename the folder to cms

Step 3. Copy the cms folder to WAMP's www folder
Step 4. Start WAMP and hit url in browser (http://localhost/cms)
Thus we completed the initial steps.

How to print Query in codeigniter

Sometimes we will not get expected results after a DB operation. CodeIgniter provides a feature to print the query statement. statement of last executed query. we can manually check and find the error

                                           $this->db->last_query();                                                                          

using echo you can print the query.

Difference between innoDB & MyISAM

innoDB	MyISAM
innoDB support transactions, so that if something went wrong, we can roll back the transaction	MyISAM is not meant for transactional purpose. Once command issued we cannot rollback the transaction
innoDB doesn't support full support text searching	MyISAM support full text searching
innoDB do row locking	MyISAM do table locking
innoDB maintain ACID	MyISAM doesn't
innoDB can use with table having many data modification	MyISAM doesn't recommended
innoDB for high volume & High performance	MyISAM not recommended

Wamp Installation Error

“Aestan Tray Menu has encountered a problem and needs to close. We are sorry for the inconvenience.” This is a common error, familiar for wamp admins. Once I have met with this error and i tried several methods to solve it, but everything got failed. Finally i found the solution.

The Problem is your windows machine may not have proper/latest dotNet framework. I downloaded it and installed framework and reinstalled WAMP. Wamp loaded fine. 

Link: http://www.microsoft.com/en-us/download/details.aspx?id=21

Before Installing WAMP make sure that you uninstalled old versions.

How to Upload bulk user in moodle

Moodle allows bulk user management. You can upload and manage users.
 Create a new course in moodle.
goto Site Administration -> Users -> Account -> upload users

Click on upload user

Now we need to prepare CSV file. Open a notepad type as shown in figure. Save it filename.csv
then upload it.

Here CF100 is the course code.  Click upload button and you will reach this page

 

Click on upload user button at the bottom of the page. Hence you completed the  bulk user uploading

 

Moodle a Free online course management system

Moodle is one of the major online course management tool available in internet. This is a free software with almost all features of a professional course management system. You can download moodle from here.
Click here to Download. Moodle allows lot of features like

1.  Site Management
2. User Management
3. Course Management
4. Great Support

Site Management
Site can be managed by an administrator. There are lot of plugins & templates (themes) are available for Moodle

User Management
This includes
 1. Enrollment
 2. Roles
 You can add user by one by one and you have lot of options for managing the user. Bulk uploading feature allows you to upload list of users at a time.

Course Management
 This is the most important module of moodle. This module help the tutor to effectively manage his course and share it with his participants. Course management has following advantages
  1. Course Reports
  2. Assignment Module
  3. Chat Module
  4. Choice Module
  5. Forum Module
  6. Glossary Module
  7. Lesson Module
  8. Quiz Module
  9. Resource Module
  10. Survey Module
  11. Wiki Module
  12. Workshop Module

Support 

Moodle has a great community & organisations for its support.

1. Forum
2. User Forum
3. Social Forum

From the next posts we can learn how we can efficiently & effectively use Moodle.

How to increase menu speed in windows?

We can increase Menu speed in windows machines (XP) by altering some values in registry.
For that open regedit
Start ->run and type regedit
Goto

HKEY_CURRENT_USER\Control Panel\Desktop

Locate the key called "MenuShowDelay" and it is probably set to 400.

Change that value to 150.

Restart PC

How to set a website as your home page in IE

There are lot of ways to set default homepage. To change home page in IE we can do the following procedure

Tools -> Internet Options
From the popup choose General Tab and here you can set it

Now lets learn how to make a default home page in IE. For that we have to make some registry files.  This tutorial also give an awareness to make registry files.

Here I am going to set google as my default home page.

CODE
REGEDIT4

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
"Search Page"="http://www.google.com"
"Search Bar"="http://www.google.com/ie"

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchURL]
""="http://www.google.com/keyword/%s"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Search]
"SearchAssistant"="http://www.google.com/ie"

Copy the whole text to a notepad and give a suitable name. please note that the extension should be

.reg

Then double click and import the library to registry. It will work!!

Keyboard Shorcuts (Microsoft Windows)

Hundreds  of shortcut that can prove your proficiency in front of your fiends and colleagues.

 Keyboard Shorcuts (Microsoft Windows)
1. CTRL+C (Copy)
2. CTRL+X (Cut)
... 3. CTRL+V (Paste)
4. CTRL+Z (Undo)
5. DELETE (Delete)
6. SHIFT+DELETE (Delete the selected item permanently without placing the item in the Recycle Bin)
7. CTRL while dragging an item (Copy the selected item)
8. CTRL+SHIFT while dragging an item (Create a shortcut to the selected item)
9. F2 key (Rename the selected item)
10. CTRL+RIGHT ARROW (Move the insertion point to the beginning of the next word)
11. CTRL+LEFT ARROW (Move the insertion point to the beginning of the previous word)
12. CTRL+DOWN ARROW (Move the insertion point to the beginning of the next paragraph)
13. CTRL+UP ARROW (Move the insertion point to the beginning of the previous paragraph)
14. CTRL+SHIFT with any of the arrow keys (Highlight a block of text)
SHIFT with any of the arrow keys (Select more than one item in a window or on the desktop, or select text in a document)
15. CTRL+A (Select all)
16. F3 key (Search for a file or a folder)
17. ALT+ENTER (View the properties for the selected item)
18. ALT+F4 (Close the active item, or quit the active program)
19. ALT+ENTER (Display the properties of the selected object)
20. ALT+SPACEBAR (Open the shortcut menu for the active window)
21. CTRL+F4 (Close the active document in programs that enable you to have multiple documents opensimultaneou sly)
22. ALT+TAB (Switch between the open items)
23. ALT+ESC (Cycle through items in the order that they had been opened)
24. F6 key (Cycle through the screen elements in a window or on the desktop)
25. F4 key (Display the Address bar list in My Computer or Windows Explorer)
26. SHIFT+F10 (Display the shortcut menu for the selected item)
27. ALT+SPACEBAR (Display the System menu for the active window)
28. CTRL+ESC (Display the Start menu)
29. ALT+Underlined letter in a menu name (Display the corresponding menu) Underlined letter in a command name on an open menu (Perform the corresponding command)
30. F10 key (Activate the menu bar in the active program)
31. RIGHT ARROW (Open the next menu to the right, or open a submenu)
32. LEFT ARROW (Open the next menu to the left, or close a submenu)
33. F5 key (Update the active window)
34. BACKSPACE (View the folder onelevel up in My Computer or Windows Explorer)
35. ESC (Cancel the current task)
36. SHIFT when you insert a CD-ROMinto the CD-ROM drive (Prevent the CD-ROM from automatically playing)
Dialog Box - Keyboard Shortcuts
1. CTRL+TAB (Move forward through the tabs)
2. CTRL+SHIFT+TAB (Move backward through the tabs)
3. TAB (Move forward through the options)
4. SHIFT+TAB (Move backward through the options)
5. ALT+Underlined letter (Perform the corresponding command or select the corresponding option)
6. ENTER (Perform the command for the active option or button)
7. SPACEBAR (Select or clear the check box if the active option is a check box)
8. Arrow keys (Select a button if the active option is a group of option buttons)
9. F1 key (Display Help)
10. F4 key (Display the items in the active list)
11. BACKSPACE (Open a folder one level up if a folder is selected in the Save As or Open dialog box)

Microsoft Natural Keyboard Shortcuts
1. Windows Logo (Display or hide the Start menu)
2. Windows Logo+BREAK (Display the System Properties dialog box)
3. Windows Logo+D (Display the desktop)
4. Windows Logo+M (Minimize all of the windows)
5. Windows Logo+SHIFT+M (Restorethe minimized windows)
6. Windows Logo+E (Open My Computer)
7. Windows Logo+F (Search for a file or a folder)
8. CTRL+Windows Logo+F (Search for computers)
9. Windows Logo+F1 (Display Windows Help)
10. Windows Logo+ L (Lock the keyboard)
11. Windows Logo+R (Open the Run dialog box)
12. Windows Logo+U (Open Utility Manager)
13. Accessibility Keyboard Shortcuts
14. Right SHIFT for eight seconds (Switch FilterKeys either on or off)
15. Left ALT+left SHIFT+PRINT SCREEN (Switch High Contrast either on or off)
16. Left ALT+left SHIFT+NUM LOCK (Switch the MouseKeys either on or off)
17. SHIFT five times (Switch the StickyKeys either on or off)
18. NUM LOCK for five seconds (Switch the ToggleKeys either on or off)
19. Windows Logo +U (Open Utility Manager)
20. Windows Explorer Keyboard Shortcuts
21. END (Display the bottom of the active window)
22. HOME (Display the top of the active window)
23. NUM LOCK+Asterisk sign (*) (Display all of the subfolders that are under the selected folder)
24. NUM LOCK+Plus sign (+) (Display the contents of the selected folder)
25. NUM LOCK+Minus sign (-) (Collapse the selected folder)
26. LEFT ARROW (Collapse the current selection if it is expanded, or select the parent folder)
27. RIGHT ARROW (Display the current selection if it is collapsed, or select the first subfolder)
Shortcut Keys for Character Map
After you double-click a character on the grid of characters, you can move through the grid by using the keyboard shortcuts:
1. RIGHT ARROW (Move to the rightor to the beginning of the next line)
2. LEFT ARROW (Move to the left orto the end of the previous line)
3. UP ARROW (Move up one row)
4. DOWN ARROW (Move down one row)
5. PAGE UP (Move up one screen at a time)
6. PAGE DOWN (Move down one screen at a time)
7. HOME (Move to the beginning of the line)
8. END (Move to the end of the line)
9. CTRL+HOME (Move to the first character)
10. CTRL+END (Move to the last character)
11. SPACEBAR (Switch between Enlarged and Normal mode when a character is selected)
Microsoft Management Console (MMC)
Main Window Keyboard Shortcuts
1. CTRL+O (Open a saved console)
2. CTRL+N (Open a new console)
3. CTRL+S (Save the open console)
4. CTRL+M (Add or remove a console item)
5. CTRL+W (Open a new window)
6. F5 key (Update the content of all console windows)
7. ALT+SPACEBAR (Display the MMC window menu)
8. ALT+F4 (Close the console)
9. ALT+A (Display the Action menu)
10. ALT+V (Display the View menu)
11. ALT+F (Display the File menu)
12. ALT+O (Display the Favorites menu)

MMC Console Window Keyboard Shortcuts
1. CTRL+P (Print the current page or active pane)
2. ALT+Minus sign (-) (Display the window menu for the active console window)
3. SHIFT+F10 (Display the Action shortcut menu for the selected item)
4. F1 key (Open the Help topic, if any, for the selected item)
5. F5 key (Update the content of all console windows)
6. CTRL+F10 (Maximize the active console window)
7. CTRL+F5 (Restore the active console window)
8. ALT+ENTER (Display the Properties dialog box, if any, for theselected item)
9. F2 key (Rename the selected item)
10. CTRL+F4 (Close the active console window. When a console has only one console window, this shortcut closes the console)
Remote Desktop Connection Navigation
1. CTRL+ALT+END (Open the Microsoft Windows NT Security dialog box)
2. ALT+PAGE UP (Switch between programs from left to right)
3. ALT+PAGE DOWN (Switch between programs from right to left)
4. ALT+INSERT (Cycle through the programs in most recently used order)
5. ALT+HOME (Display the Start menu)
6. CTRL+ALT+BREAK (Switch the client computer between a window and a full screen)
7. ALT+DELETE (Display the Windows menu)
8. CTRL+ALT+Minus sign (-) (Place a snapshot of the active window in the client on the Terminal server clipboard and provide the same functionality as pressing PRINT SCREEN on a local computer.)
9. CTRL+ALT+Plus sign (+) (Place asnapshot of the entire client window area on the Terminal server clipboardand provide the same functionality aspressing ALT+PRINT SCREEN on a local computer.)

Microsoft Internet Explorer Keyboard Shortcuts
1. CTRL+B (Open the Organize Favorites dialog box)
2. CTRL+E (Open the Search bar)
3. CTRL+F (Start the Find utility)
4. CTRL+H (Open the History bar)
5. CTRL+I (Open the Favorites bar)
6. CTRL+L (Open the Open dialog box)
7. CTRL+N (Start another instance of the browser with the same Web address)
8. CTRL+O (Open the Open dialog box,the same as CTRL+L)
9. CTRL+P (Open the Print dialog box)
10. CTRL+R (Update the current Web page