Syntax of the day

Javascript Disable Functionality of Back Button & Reload or trace when the BACK/Reload button have been clicked

2010-08-16T14:23:00.002+08:00

Some people think it cannot be done, and some says "why disabling the functionality of Back & Reload"... for those who really need to disable the functionality of back & reload button only knows why they need to disable it. For example.. most of secure banking site will disable BACK & RELOAD functionality.. which is when user hit BACK button or RELOAD it will destroy your session and redirect to the login page (User must use system menu for navigation in the system). For those who are intend to do such kind of things, you're at right place.

The following code is to destroy user session when user hit BACK & RELOAD button/contextmenu (its mean, anywhere to go inside the system it must be through system menu no BACK button please) and considering the system have a user login session check on every page and html output setting cannot be cached by browser & proxy (in PHP normally set as session_cache_limiter('nocache')) or by sending the following header to make the page is fresh everytime:-

header( "Expires: Sun, 03 Aug 1980 03:00:00 GMT" );
header( "Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT" );
header( "Cache-Control: no-cache, must-revalidate" );
header( "Pragma: no-cache" );

here is the javascript of mine to kill session when user hit back & reload:

var historylength = history.length;
var inithistorylength = historylength;
function prepareKillSession(){
window.history.forward();
temp = history.length;
if(historylength == temp && inithistorylength != temp){
//whatever code you want to do here... can alert or redirect to warning page
document.location.href = 'login.php';
} else{
historylength = temp;
}
}

the system uses IFRAME.. and the page of the system will be loaded into the IFRAME and the javascript code to disable the BACK & RELOAD functionality will be put in the header of page that hold the IFRAME code

call the javascript function inside the IFRAME onload e.g:

< i f r a m e src="index.php" height="300" id="mainframe" onload="prepareKillSession();" width="400">< / i f r a m e >

Ok done.. thats all.. already tested on Mozilla,IExplorer & Google Chrome

Any advice,suggestion & critics are welcome... it might be some other good way to do.. i dont know... you might be knew something else better

BitmapExporter Flash Player 10 File Reference Issue

2008-12-17T09:53:00.000+08:00

I skip using the filereference object class to open the Save Dialog Box since i noticed the security enghancement in the filereference class in flash player 10.

here is my trick

i used the browser browser open/save dialog instead of flash command to open the dialog...i set the dontRetrieve value to true, so it will not do a retrieve task by popping up the save dialog box by filereference object.

in the flash document..
put the 'saved' listener as follows

BitmapExporter.

addEventListener( "progress", this);
BitmapExporter.addEventListener( "status", this);
BitmapExporter.addEventListener( "error", this);
BitmapExporter.addEventListener("saved", this);

and this is the listener function

function saved(evt:Object):Void {
getURL(evt.url + "&delete=1", "_blank");
}

i set the dontRetrieve value to true

BitmapExporter.saveBitmap( bitmap:BitmapData, filename:String, [mode:String], [lossBits:Number], [jpegQuality:Number], [dontRetrieve:Boolean] );

BitmapExporter.saveBitmap(snapshot, "Recommendation_Sheet.jpg", "default", 0,70,true);

By setting it to TRUE, it will not use the FileReference() to open the dialog window....

Then in the BitmapExporter.php add the following line

header('Content-Disposition: attachment; filename="myfilename.'.$format.'"');

see my code below where i put the line

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

case "download":
$file = $RELATIVE_SAVEPATH.basename($_GET["name"]);
if (isset($_GET["delete"]))
{
$deleteFile = ($_GET["delete"] == "1");
}
if (file_exists($file))
{
$_format = explode( ".", $file);
$format = strtolower( $_format[1] );

switch ( $format )
{
case "png":
header ("Content-type: image/png");
break;

case "jpg":
case "jpeg":
header ("Content-type: image/jpeg");
break;

case "bmp":
header ("Content-type: image/bmp");
break;

default:
if ($LOGGING) error_log("Unknown filetype: ".$format, 3, "be_log" );
exit();
break;
}
header('Content-Disposition: attachment; filename="Recommendation_Sheet.'.$format.'"');
header("Content-Length: ".(string)(filesize($file)));

readfile( $file );
if ($deleteFile) while(!unlink( $file ));
} else {
if ($LOGGING) error_log($file." does not exist", 3, "be_log" );
exit();
}

cleanUpTempFolder();
break;

How to bypass WPA (Windows Activation) on Windows XP

2007-08-01T17:15:00.000+08:00

How to bypass WPA (Windows Activation) on Windows XP
Tested on Windows XP Professional SP2 and Windows Server 2003 R2.

First, click "Run..." on your start menu, type "regedit" and press enter.
The Registry Editor opens up, and you are presented with a long list of keys on the left.
Browse through the list to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WPAEvents.
(If you can't find this key, you're screwed!)
On the right, you should see a stringz value named OOBETimer.
This is the activation stuff. If you change it, Windows will change it back within a few seconds.
Whatever its value is, change it to FF D5 71 D6 8B 6A 8D 6F D5 33 93 FD.
(At first I thought this was different for each machine/serial number, but it's always the same if windows is activated...LOL)
After you've changed it, right-click WPAEvents and choose "Permissions..."
A little window opens up with a list of user names. Click SYSTEM, and in the list below ("Permissions for SYSTEM") check every box under "Deny". Click OK to own windows. You don't even have to reboot lol.
If you're too slow windows might change it back, so just hit F5 to refresh and make sure it got saved.
If not, just try again. Microsoft owns for making it so easy to hack their software.
So, just keep on enjoying an activated version of windows. swapnil_009 over and out!

The problem most of you are probably having is when you get to the "Permissions" section, so i expand on this tricky area.

Under "Permissions..." for WPAEvents, Go into the Advanced settings.

UNCHECK "Inhereit from parent the permission entries that apply to child objects. Include these with entries explicitly defined here"

When prompted what course of action to take from here, click "COPY"

From there, Highlight the SYSTEM line, and click edit.

Deny all options, apply, and run a free copy of windows.

Change oracle data type

2007-05-17T11:55:00.000+08:00

Run through the following steps, substituting your table and field names, and the required datatype.

-- Create a new temporary holding field with the target datatype

ALTER TABLE table_name
ADD temporary_field VARCHAR2(100) NULL;

-- Move the data to the new field and cast to the new datatype accordingly

UPDATE table_name
SET temporary_field=TO_CHAR(original_field);

-- If the original_field has dependent constraints, they

-- must be dropped now.

-- If the original_field is the primary key
-- Drop the primary key constraint

ALTER table table_name
DROP PRIMARY KEY;

-- If the original field cannot be null
-- Update the not null constraint for the original field

ALTER TABLE table_name
MODIFY original_field NULL;

-- Delete everything in the original field

UPDATE table_name
SET original_field=NULL;

-- Modify the datatype of the original field

ALTER TABLE table_name
MODIFY original_field VARCHAR2(100);

-- Move the data back to the original field

UPDATE table_name
SET original_field=temporary_field;

-- Add the not null constraint back if necessary

ALTER TABLE table_name
MODIFY original_field NOT NULL;

-- Add the primary key back if necessary
ALTER TABLE table_name
ADD PRIMARY KEY (original_field);

-- Drop the temporary holding field

ALTER TABLE table_name
DROP COLUMN temporary_field;

-- Done.

PHP: My Country Dropdown List

2007-05-15T10:09:00.000+08:00

Unable to Open Hard or USB Flash Drive with Windows Script Host Cannot Find Script File autorun.vbs Error

2007-05-14T10:04:00.000+08:00

In some situation especially when anti-virus program has cleaned, healed, disinfected or removed a worm, trojan horse or virus from computer, there may be error happening whenever users try to open or access the drive by double clicking on the disk drive icon in Explorer or My Computer window to try to enter the drive’s folder. The problem or symptom happens in hard disk drive, portable hard disk drive or USB flash drive, and Windows will prompt a dialog box with the following message:

Windows Script Host

Can not find script file autorun.vbs.

Sometimes you will be asked to debug the VBScript with error code of 800A041F - Unexpected ‘Next’.

or

Choose the program you want to use to open this file with:

In this case, the “Always use the selected program to open this kind of file” option is grayed out.

The symptom occurs because when autorun.vbs is created by trojan horse or virus. The virus normally loads autorun.inf file to root folder of all hard drive or USB drive, and then execute autorun.bat file which contains script to apply and merge autorun.reg into the registry, with possible change to the following registry key to ensure that virus is loaded when system starts:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
Userinit=userinit.exe,autorun.exe

Finally, autorun.bat will call wscript.exe to run autorun.vbs.

When antivirus or security software detected the autorun.vbs file as infected, the file will be deleted or removed or quarantined. However, other files (autorun.*） and registry value still referring to autorun.vbs, and this document no longer exists, hence the error when users double click to open a drive folder.

To correct and solve this error, follow this steps:

Run Task Manager (Ctrl-Alt-Del or right click on Taskbar)
Stop wscript.exe process if available by highlighting the process name and clicking End Process.
Then terminate explorer.exe process.
In Task Manager, click on File -> New Task (Run…).
Type “cmd” (without quotes) into the Open text box and click OK.
Type the following command one by one followed by hitting Enter key:
del c:\autorun.* /f /s /q /a
del d:\autorun.* /f /s /q /a
del e:\autorun.* /f /s /q /a

c, d, e each represents drive letters on Windows system. If there are more drives or partitions available, continue to command by altering to other drive letter. Note that you must also clean the autorun files from USB flash drive or portable hard disk as the external drive may also be infected.

In Task Manager, click on File -> New Task (Run…).
Type “regedit” (without quotes) into the Open text box and click OK.
Navigate to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Check if the value name and value data for the key is correct (the value data of userint.exe include the path which may be different than C drive, which is also valid, note also the comma which is also needed):
“Userinit”=”C:\WINDOWS\system32\userinit.exe,”

If the value is incorrent, modify it to the valid value data.

Filter Input; Only Alphnumeric

2006-12-08T21:09:00.000+08:00

if (!ctype_alnum($input)){
//Invalid input
}

//return true if $input = "abcdeFg123DDD"

//return false if $input = "#a!bcdeFg123DDD";

SIMPLE LAMP Configuration

2006-08-18T14:48:00.000+08:00

INSTALL APACHE 1.3.33
---------------------

cd /
./configure --prefix=/usr/local/apache --enable-module=so --enable-module=rewrite
make
make install

INSTALL MYSQL 4.1.21
--------------------

cd /
./configure --prefix=/database/mysql
make
make install
cp support-files/my-medium.cnf /etc/my.cnf
cd /usr/local/mysql
bin/mysql_install_db --user=mysql
chown -R root .
chown -R mysql var
chgrp -R mysql .

#vi /etc/ld.so.conf
And we add the following line;
/usr/local/mysql/lib/mysql

ldconfig
bin/mysqld_safe --user=mysql &

bin/mysqladmin -u root password rootpass

INSTALL PHP 4.3.10
------------------

cd /
./configure --prefix=/usr/local/php --with-apxs=/usr/local/apache/bin/apxs --with-mysql=/database/mysql --enable-track-vars

make clean
make
make install
cp php.ini-recommended /usr/local/php/lib/php.ini

under php.ini
doc_root= "/usr/local/apache2/htdocs/"

STARTING APACHE & MYSQL AUTOMATICALLY
-------------------------------------

cd /
cp support-files/mysql.server /etc/init.d/mysql

create some links in the startup folders for run levels 3 and 5.

cd /etc/rc3.d
ln -s ../init.d/mysql S85mysql
ln -s ../init.d/mysql K85mysql
cd /etc/rc5.d
ln -s ../init.d/mysql S85mysql
ln -s ../init.d/mysql K85mysql
cd ../init.d
chmod 755 mysql

cd /usr/local/apache/bin
cp apachectl /etc/init.d/httpd

cd /etc/rc3.d
ln -s ../init.d/httpd S85httpd
ln -s ../init.d/httpd K85httpd
cd /etc/rc5.d
ln -s ../init.d/httpd S85httpd
ln -s ../init.d/httpd K85httpd

Javascript : Hide & Show DIV content

2006-07-31T12:20:00.000+08:00

function hide_them_all() {
getElement("csv_options").style.display = 'none';
getElement("excel_options").style.display = 'none';
getElement("latex_options").style.display = 'none';
getElement("htmlexcel_options").style.display = 'none';
getElement("htmlword_options").style.display = 'none';
getElement("sql_options").style.display = 'none';
getElement("none_options").style.display = 'none';
}

function show_them_all() {
getElement("csv_options").style.display = 'block';
getElement("excel_options").style.display = 'block';
getElement("latex_options").style.display = 'block';
getElement("htmlexcel_options").style.display = 'block';
getElement("htmlword_options").style.display = 'block';
getElement("sql_options").style.display = 'block';
getElement("none_options").style.display = 'block';
}

Javascript: change table row color style

2006-07-26T23:01:00.000+08:00

sample syntax is:

[row object].style.backgroundColor='#d3e4f5';

Example of implementation;- Change the row color on mouseover/mouseout & mousedown

<tr onmouseover="mouseOverColor(this);" onmouseout="mouseOutColor(this);"
onmousedown="clickOnColor(this);">

Javascript function:

function mouseOverColor(obj){
if(obj.style.backgroundColor.toUpperCase() != '#FFCC99'){
obj.style.backgroundColor='#CCFFCC';
}
obj.style.cursor='pointer';
}

function mouseOutColor(obj){
if(obj.style.backgroundColor.toUpperCase() != "#FFCC99"){
obj.style.backgroundColor='#d3e4f5';
}
obj.style.cursor='normal';
}

function clickOnColor(obj){
if(obj.style.backgroundColor.toUpperCase() == "#FFCC99"){
obj.style.backgroundColor='#CCFFCC';
} else{
obj.style.backgroundColor='#FFCC99';
}
}

Install Apache, MySql dan PHP (Windows)

2006-07-19T22:38:00.000+08:00

1. Pengenalan

Artikel ini merumuskan cara dan kaedah yang paling mudah untuk install dan konfigurasi Apache, MySql dan PHP pada pelantar sistem pengoperasian Windows. Versi perisian yang akan diterangkan di dalam artikel ini adalah seperti berikut:

- Apache 1.3.33 - installer
- MySQL 4.1.10 - installer
- PHP 4.3.10 - binary zip package
- Windows XP/2K

Sila download perisian-perisian tersebut di laman web pengeluar:

Apache - http://httpd.apache.org/download.cgi
MySQL - http://dev.mysql.com/downloads/
PHP - http://www.php.net/downloads.php

2. Install Pelayan Web Apache

Dengan menggunakan apache installer, anda cuma perlu mengikut arahan dan maklumat semasa proses install. Berikut adalah maklumat yang perlu diberikan semasa proses install:

- Nama Domain e.g alamatdomain.com
- Alamat web e.g www.alamatdomain.com
- Alamat Email webmaster e.g webmaster@alamatdomain.com

** Maklumat berikut boleh diubahsuai semula selepas proses install. Anda boleh meletakkan apa sahaja maklumat tiruan sekiranya maklumat yang benar bagi item-item tersebut tiada.

Sila pastikan Apache Service dilarikan at system start-up sebagai Service untuk semua pengguna (user) komputer tersebut.

NOTA: Sekiranya IIS Server is running, sila stopkannya terlebih dahulu.

3. Install MySQL

Install MySql dengan menggunakan MySql Installer. Dengan mengunakan wizard installer tersebut anda hanya perlu mengikut arahan dan maklumat semasa proses install.

Pilih jenis Typical Install dan pastikan MySQL run sebagai service at start-up, nama service yang dicadangkan ialah MySql. Berikut adalah maklumat penting yang perlu ditentukan semasa proses install:

- Katalaluan untuk Master User (root)
- Tentukan samada server Mysql tersebut boleh diakses oleh anonymous
- Tentukan samada root boleh diakses hanya dari localhost

4. Install PHP

Unzip package yang telah didownload e.g php4-3-10.zip unzip to C:\My Document\php4-3-10
Copy C:\My Document\php4-3-10\ ke C:\php4-3-10

Rename C:\php4-3-10\ kepada C:\php

Copy C:\php\php.ini-dist ke dalam direktori C:\Windows atau C:\WINNT dan rename kepada php.ini

Copy C:\php\php4ts.dll ke dalam direktori C:\WINNT atau C:\Windows

Copy semua fail yang terdapat di dalam C:\php\dlls\ ke dalam direktori C:\WINNT\System32\ atau C:\Windows\System32\

Buka fail config php C:\WINNT\php.ini atau C:\Windows\php.ini dan cari setting extension_dir dan tetapkan seperti berikut

extension_dir = c:/php/extensions/

4.1 Install Sebagai CGI binary

Buka config file bagi apache C:\Program Files\Apache Group\Apache\conf\httpd.conf dan TAMBAH line berikut selepas line AddModule

ScriptAlias /php/ "c:/php/"
AddType application/x-httpd-php .php
Action application/x-httpd-php "/php/php.exe"

NOTA: Install sebagai CGI akan mendedahkan server anda kepada beberapa jenis serangan penggodam. Sila baca dengan lebih lanjut berkenaan dengan PHP CGI security (www.php.net) untuk mengetahui dengan lebih lanjut bagaimana untuk mengelak serangan-serangan yang mungkin boleh dilakukan.

4.2 Install Sebagai Modul Apache

Buka config file bagi apache C:\Program Files\Apache Group\Apache\conf\httpd.conf dan TAMBAH line berikut selepas line AddModule

LoadModule php4_module "c:/php/sapi/php4apache.dll"
AddType application/x-httpd-php .php

SILA Restart server Apache dengan menggunakan command NET STOP APACHE kemudian diikuti dengan NET START APACHE sekiranya anda menginstall apache sebagai Windows Service atau akses Services control panel under Administrative Tools.

5. Uji Server Anda

Cipta satu fail test.php dan letakkan line berikut:

phpinfo();

Save fail tersebut di C:\Program Files\Apache Group\Apache\htdocs\test.php

Buka Internet Explorer anda dan akses kepada http://localhost/test.php

Sekiranya page tersebut berjaya dipaparkan.. ini bermakna konfigurasi php dan apache anda sudah berjaya.. sekiranya tidak, hubungi saya.

VB6 - Set Current Working Directory

2006-07-19T15:05:00.000+08:00

'Declaration
Private Declare Function SetCurrentDirectory Lib "kernel32" _
Alias "SetCurrentDirectoryA" (ByVal lpPathName As String) As Long

'syntax to set current dir
SetCurrentDirectory App.Path

Installing Apache, Mysql and PHP on Linux

2006-07-18T10:18:00.000+08:00

Installation

The first thing we need to do is extract the sourceballs so we can work with the files included in them. Beginning now we will be working as root, so open a terminal window, change to the directory in which you saved your downloaded files and become root by issuing the "su" command, enter the root password and you should be good to go.

To extract the sourceballs type the following commands;

#tar -zxf httpd-2.0.48.tar.gz
#tar -zxf mysql-4.0.16.tar.gz
#tar -zxf php-4.3.4.tar.gz

The commands above will extract the sourceballs into their own separate directories. Now lets move on to compiling the source into usable programs. We'll start with Apache.

Compiling Apache

Change into the directory created when you untarred the sourceball as follows;

#cd httpd-2.0.48

Follow this command by typing;

#./configure –prefix=/usr/local/apache2 –enable-mods-shared=most (enter)

This tells Apache to install in the /usr/local/apache2 directory, and to build most of the available loadable modules. There are a ton of options with Apache, but these should work for the most part. Once the configure is done and the system returns the prompt to you, issue the following command;

#make

This will take a few minutes, once the prompt comes back again issue the following command;

#make install

Wait for a few minutes and viola !, Apache is installed with the exception of a few minor changes we still need to make. They are as follows..

Issue the following command;

#vi /usr/local/apache2/conf/httpd.conf

Check to make sure the following line is present in the file at the bottom of the LoadModule list, if it is not there add it;

LoadModule php4_module modules/libphp4.so

Find the DirectoryIndex line and edit it so it looks like the following;

DirectoryIndex index.html index.html.var index.php

Find the AddType application section and add the following line;

AddType application/x-httpd-php .php

Thats it, save the file and we are done with Apache. Now, on to MySQL !

Compiling MySQL

Change into the MySQL source directory as follows;

#cd mysql-4.0.16

Follow this command by typing;

#./configure –prefix=/usr/local/mysql –localstatedir=/usr/local/mysql/data –disable-maintainer-mode –with-mysqld-user=mysql –enable-large-files-without-debug

Sit back and wait for a while while configure does its thing, once the system returns the prompt to you issue the following command;

#make

Unless you have a very fast machine this will take some time, so spend time with your family, grab a beer, go for a walk, or whatever you're into. When you get back, assuming the system has returned the prompt to you issue the following command;

#make install

Cool !, MySQL is installed, there are only a couple things left to do to get it working, first we need to create a group for MySQL as follows;

#/usr/sbin/groupadd mysql

Then we create a user called mysql which belongs to the mysql group;

#/usr/sbin/useradd -g mysql mysql

Now we install the database files as follows;

#./scripts/mysql_install_db

Then we make a couple minor ownership changes;

# chown -R root:mysql /usr/local/mysql
# chown -R mysql:mysql /usr/local/mysql/data

Last but not least, we use vi to add a line the ld.so.conf file as follows;

#vi /etc/ld.so.conf

And we add the following line;

/usr/local/mysql/lib/mysql

Thats it, MySQL is installed, you can run it by issuing the following command;

#/usr/local/mysql/bin/mysqld_safe –user=mysql &

And as long as we're here we might as well set a root password for MySQL as follows;

#/usr/local/mysql/bin/mysqladmin -u root password new_password

Where "new_password" is the password you want to use.

Ok, so far so good, on to PHP !

Compiling PHP

Change into the PHP source directory as follows;

#cd php-4.3.4

Follow this command by typing;

#./configure –prefix=/usr/local/php –with-apxs2=/usr/local/apache2/bin/apxs –with-mysql=/usr/local/mysql

Once the prompt comes back to you issue the following command;

#make

Hang out for awhile, and then yep, you guessed it, once you have the prompt back;

#make install

Once the install finishes and you have the prompt back issue the following command;

#cp php.ini-recommended /usr/local/php/lib/php.ini

Then edit that file;

#vi /usr/local/php/lib/php.ini

And change the following;

Find the "doc_root" section and enter the correct path for the directory which serves your web content, such as;

doc_root= "/usr/local/apache2/htdocs/"
(this is default for apache2)

Then find the file_uploads section and change it to reflect the following;

file_uploads=Off
(for security reasons)

Thats if for PHP, now lets see if it all works..

Testing

Assuming your MySQL process is still running from earlier, lets start Apache by issuing the following command;

#/usr/local/apache2/bin/apachectl start

This starts the Apache web server, now change into the following directory;

#cd /usr/local/apache2/htdocs

And using vi create a file called test.php;

#vi test.php

Add the following line to the file;

Save the file, then fire up your browser and point it to localhost/test.php. You should see a listing of all kinds of cool info about Apache, PHP, etc. If you do then your set !, if you don't, then take a look at your logs for Apache and MySql, and remember Google is your friend. But hopefully you do, and now you have a fully functioning setup.

Ok, one last step and we'll be done, you have everything running now, but you had to start Apache and MySql manually, that's something you don't want to have to remember to do everytime you reboot your machine, so lets fix it.

Starting Apache and MySQL Automatically

Lets start with MySQL, as root make your working directory that of the MySQL source directory you worked with earlier, something similar to;

#cd /home/xxxx/mysql-4.0.16

Then, copy the file mysql.server to your /etc/init.d directory as follows;

#cp support-files/mysql.server /etc/init.d/mysql

Ok, lets create some links in the startup folders for run levels 3 and 5.

#cd /etc/rc3.d
#ln -s ../init.d/mysql S85mysql
#ln -s ../init.d/mysql K85mysql
#cd /etc/rc5.d
#ln -s ../init.d/mysql S85mysql
#ln -s ../init.d/mysql K85mysql
#cd ../init.d
#chmod 755 mysql

Thats it for MySQL, it should start automatically now when you reboot your machine. Now lets do the same for Apache, still logged in as root, make your working directory that of the Apache binaries as follows;

#cd /usr/local/apache2/bin

Then, copy the file called apachectl as follows;

#cp apachectl /etc/init.d/httpd

Now, for some more links;

#cd /etc/rc3.d
#ln -s ../init.d/httpd S85httpd
#ln -s ../init.d/httpd K85httpd
#cd /etc/rc5.d
#ln -s ../init.d/httpd S85httpd
#ln -s ../init.d/httpd K85httpd

And thats it for Apache !, it should start automatically along with MySQL the next time you boot your machine.

Autorun CD in Linux

2006-07-18T10:07:00.000+08:00

Create file named "autorun", put the following syntax (if you want to open the index.htm once the CD mounted)

#!/bin/sh

mozilla file:///mnt/cdrom/index.htm &

How to encode a message..

2006-07-18T09:11:00.000+08:00

The following PHP user defined function is to encode and decode a string message. This is how to encode a message so that only people having the right key can easily read the message. This method called ciphers. All the earliest ciphers that we know about use simple substitutions. For example, Julius Caesar kept his messages secret by taking each letter in the message and replacing it with the one three letters further on; the letter A is replaced by D, B is replaced by E, and so on, until you get ti the letters after X. since X is 24th letter of the alphabet, you have to wrap around to the beginning of the alphabet, and X becomes A, Y becomes B, Z becomes C.

In this function subsitutions scheme is not based on alphabet order but based on ascii code. Here it is..

function EncodeKey($myStr="",$inKey=""){
$error = false;
if(empty($inKey)){
//echo "Encode key is required
";
$error = true;
}

if(empty($myStr)){
//echo "String to encode is empty";
$error = true;
}

if(!$error){
//$tmpNum, $tmpChr, $tmpAsc, $newAsc, $retStr;

$tmpNum = 0;
$retStr = "";

for($i=0;$i< strlen($myStr);$i++){
$tmpChr = substr($myStr,$i,1);
$tmpAsc = ord($tmpChr);
$newAsc = $tmpAsc - ord(substr($inKey,$tmpNum,1));
if($newAsc <= 0){
$newAsc = 255 + $newAsc;
}

$retStr = $retStr . chr($newAsc);
$tmpNum = $tmpNum + 1;

if($tmpNum >= strlen($inKey)){
$tmpNum = 0;
}
}

return $retStr;

} else{
return "";
}

}

function DecodeKey($myStr="",$inKey=""){
$error = false;
if(empty($inKey)){
//echo "Encode key is required
";
$error = true;
}

if(empty($myStr)){
//echo "String to encode is empty";
$error = true;
}

if(!$error){
//$tmpNum, $tmpChr, $tmpAsc, $newAsc, $retStr;

$tmpNum = 0;
$retStr = "";

for($i=0;$i< strlen($myStr);$i++){
$tmpChr = substr($myStr,$i,1);
$tmpAsc = ord($tmpChr);
$newAsc = $tmpAsc + ord(substr($inKey,$tmpNum,1));
if($newAsc > 255){
$newAsc = $newAsc - 255;
}

$retStr = $retStr . chr($newAsc);
$tmpNum = $tmpNum + 1;

if($tmpNum >= strlen($inKey)){
$tmpNum = 0;
}
}

return $retStr;

} else{
return "";
}

}

PHP mktime()

2006-03-23T19:11:00.000+08:00

mktime() is useful for doing date arithmetic and validation, as it will automatically calculate the correct value for out-of-range input. For example, each of the following lines produces the string "Jan-01-1998".

echo date("M-d-Y", mktime(0, 0, 0, 12, 32, 1997));
echo date("M-d-Y", mktime(0, 0, 0, 13, 1, 1997));
echo date("M-d-Y", mktime(0, 0, 0, 1, 1, 1998));
echo date("M-d-Y", mktime(0, 0, 0, 1, 1, 98));

Date function in php

2006-03-16T13:46:00.000+08:00

Date function in php

various of use for date function in php

// Assuming today is: March 10th, 2001, 5:16:18 pm

$today = date("F j, Y, g:i a"); // March 10, 2001, 5:16 pm
$today = date("m.d.y"); // 03.10.01
$today = date("j, n, Y"); // 10, 3, 2001
$today = date("Ymd"); // 20010310
$today = date('h-i-s, j-m-y, it is w Day z '); // 05-16-17, 10-03-01, 1631 1618 6 Fripm01
$today = date('\i\t \i\s \t\h\e jS \d\a\y.'); // It is the 10th day.
$today = date("D M j G:i:s T Y"); // Sat Mar 10 15:16:08 MST 2001
$today = date('H:m:s \m \i\s\ \m\o\n\t\h'); // 17:03:17 m is month
$today = date("H:i:s"); // 17:16:17
?>

Javascript to detect current active element

2006-02-27T16:37:00.000+08:00
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>

<head>

<title>Untitled</title>

<script>

function initPage() {

setInterval('show()',500)

if (document.activeElement) {

return;

}

document.activeElement = null; // set up global var

if (document.forms.length>0) {

for (i=0;i<document.forms.length;i++) {

for (j=0;j<document.forms[i].elements.length;j++) {

document.forms[i].elements[j].onfocus=new Function ("document.activeElement=this;");

}

}

}

if (document.links.length>0) {

for (i=0;i<document.links.length;i++) {

document.links[i].onfocus=new Function ("document.activeElement=this");

}

}

}

function show() {

if (document.activeElement && document.activeElement.name) document.getElementById('what').innerHTML='Active:'+document.activeElement.name

else if (document.activeElement && document.activeElement.href) document.getElementById('what').innerHTML='Active:'+document.activeElement.href

}

</script>

</head>

<body onLoad="initPage()">

<form>

<input name="form1_elem1" type="text">

<input name="form1_elem2" type="text">

</form>

<a href="1.html">Hello 1</a>

<form>

<input name="form2_elem1" type="text">

<input name="form2_elem2" type="text">

</form>

<a href="2.html">Hello 2</a>

<div id="what"></div>

</body>

</html>

Generate unique id (PHP)

2006-02-24T17:47:00.000+08:00
This is to generate unique id (PHP) based on current time in microseconds

// no prefix
$token = md5(uniqid());

// better, difficult to guess
$better_token = md5(uniqid(rand(), true));

Detect browser type

2006-02-24T17:32:00.000+08:00
javascript to detect browser type.

Browser = navigator.appName

Net = Browser.indexOf("Netscape")
Micro = Browser.indexOf("Microsoft")

Netscape = false
IE = false

if(Net >= 0) {
Netscape = truealert("You're using Netscape")
}

if(Micro >= 0) {
IE = truealert("You're using Internet Explorer")
}