I was looking for a code to generate random password to be given to a newly registered user for my system.

Maybe you can use it as verification code for them to enter your system for the first time and validate that their provided e-mail is valid.

Here’s the code

<?php

/** * The letter l (lowercase L) and the number 1 * have been removed, as they can be mistaken * for each other. */

function createRandomPassword() {

    $chars = “abcdefghijkmnopqrstuvwxyz023456789″;    srand((double)microtime()*1000000);    $i = 0;    $pass = ” ;

    while ($i <= 7) {        $num = rand() % 33;        $tmp = substr($chars, $num, 1);        $pass = $pass . $tmp;        $i++;    }

    return $pass;

}

// Usage$password = createRandomPassword();echo “Your random password is: $password”;

?> 

Source: http://www.totallyphp.co.uk/code/create_a_random_password.htm

I’ve been looking for javascsript drop down menu. It works like this.

When you select on an option for first menu, it will invoke list of another menu. Then you can make selection on the other menu and so on.

Click here for tutorial

Tags: javascript, drop down menu, javascript drop down

Form validation using javascript is the most effective ways. With this you can block any attempt to send a form without giving a valid value.

i’ve found a class written for this purpose. All you need is to include the file (javascript file .js), create object and add validations under your input form.

Form validation website

Tags: javascript, form validation

I’ve just bought a new notebook but the package only comes with Windows XP Home Edition. It is a problem for me to run IIS (so that I can use ASP) on the operating system.

So I looked around and found few sites that have work around to solve this problem. Here is one of the sites that have step by step tutorial for the work around.

http://adamv.com/dev/articles/iis-on-xp-home

Another option is to download Abyss web server

There are 3 ways to include CSS to your HTML code

1. Import a CSS file

<link href=”style.css” rel=”stylesheet” type=”text/css”>

2. Place CSS for the page in header part

<style>
    .style1 {font-family:Arial, Helvetica, sans-serif; }
</style>

3. Define CSS in HTML tag

<p style=”font-family:Arial, Helvetica, sans-serif”>

Tags: CSS tutorial, CSS code, CSS tip

One day I want to log on to my hosting account, but failed. Then I e-mailed web hosting support to help. I got a reply stated that one of my file (contact form) is not secure that someone from outside can execute and send spam email with the script.

To secure the script, you need to check the script is executed within your domain and from the provided form.

So here is the code, place it before you execute the send to mail script.

if(!(isset($_SERVER[’HTTP_REFERER’]) && !empty($_SERVER[’HTTP_REFERER’]) && stristr($_SERVER[’HTTP_REFERER’],$_SERVER[’HTTP_HOST’]))) {
    print “Msg not sent.”; exit;
}

or a simpler one (just check it is submitted form a form)

if (!isset($_POST[’Submit’])) {
    print ” Msg not sent’; exit;
}

If else statement is not just if else. You must think

1. security (else statement for less secure operation)
2. execution time (top if statement is the most frequently executed)

It is quite a tedious job to alter javascript or PHP each time you have a new form. Here is a simple way to do it.

In the form include this line of code

<input type=”hidden” name=”required” value=”name,email,phone”>

In the PHP (processing file)

$checkArray= explode(”,”,$_POST[’required’]);
while(list($check) = each($checkArray))
{
    if(!$$checkArray[$check]) {
    $error .= “You have not filled this required field: <b>$checkArray[$check]</b>.<br>”;
        }
}

if ($error)
    echo ‘Error in form submission’ .$error; // and stop process
else
    //process the form

So you just need to modify single line in your form file. All the checking will be done automatically in the PHP file.

Note: The code above is not tested yet.

Tags: form validation, form processing

AJAX (stands for Asynchronous Javascript And XML) is getting popular lately. It is not a new technology though.

Web application has lots of advantages over client application. With web application, people don’t have to install the application, easy to develop and manage.

A major disadvantages is it is bit slow, need to reload whole page, and less user friendly in certain part. All these mainly because it is a server-side application where the browser need to communicate a lot with server.

AJAX overcomes this problem. It only send portion of the page and does not reload the whole page.

I’ve been looking for quick tutorial to kick start with AJAX.

Read more about AJAX

Tags: AJAX tutorial, What is AJAX

It is a good idea to have a random quotes on your website front page.

Actually it is as simple as having few lines of code with a text file that store all the quotes.

Here is the code to randomly read and display the quotes.

$quotes = file(’quotes.txt’);
$rand = rand(0, count($quotes) - 1);
echo $quotes[$rand];

That’s it!