sending variables

niceguy_reddy

Hi,

I used a function to generate a random string and display it as an image with a background image. I include that php file in another php file as an image. I want to access the variable into this php file from the php file which is included as an image, how can i get it as i want to check whether the user enters the correct string shown or not.
How do i do this, please tell me.

Thanking you.

M.Anil Kumar Reddy

philipolson

I don't understand the problem as they enter the string in a form, so, that form is sent to the form processor...not the image script. BUT if you simply want to pass information to the image script you may use GET and here's an example:

<img src="image.php?string=<?php echo $_POST['somestring']; ?>">

Within image.php you now have access to $_GET['somestring']

hasin

You should do it using OOP style. Like this

Create a Class which has two Method and one property $currentNumber. One for Creating and Disposing the Image according to ur need , suppose CreateImage()
Inside createImage() function, after disposing the image with a random number, store that random number in that $currentNumber variable as $this=>currentNumber = 'ur random number'
Then create a method like returnNumber() which return the number. by calling this method u will get the number. Store it in a hidden field of HTML page. Dont forget to encode that number using md5() function so that user cant get the number by viewing ur source code of HTML file.
When submitted, compare the user's input with ur hashed md5 string and make decission.

--Thanks

niceguy_reddy

Hi,

Thanks for ur reply. I didn't understand it clearly, please send me a small sample code.

The code i use to generate the image with a random number is:

<?php

$img_number = imagecreate(100, 50);
$white = imagecolorallocate($img_number,255,255,255);
$black = imagecolorallocate($img_number,0,0,0);
$grey_shade = imagecolorallocate($img_number,204,204,204);
imagefill($img_number,0,0,$grey_shade);
ImageRectangle($img_number,5,5,94,44,$black);
ImageRectangle($img_number,0,0,99,49,$black);

$number = get_random();
Imagestring($img_number,9,30,15,$number,$black);

header("Content-type:image/jpeg");
imagejpeg($img_number);

function get_random()
{
srand(time());
$max = getrandmax();
return rand(1,$max) + rand(1,$max) ;
}
?>

I display the image in another php file like this:

<?php echo "<img src=\"random.php\">"; ?>

The php file which contains this contains a user registration form and the values are send to another page. In that page to which the values are sent i must check whether the string which is displayed on the page along with the image is entered by the user correctly.