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You can use the GD library and the relevant PHP functions to generate images. This script is helpful to generate a security number image (CAPTCHA). Each time the page is refreshed a new number is Generated.
imagecreate() - Create a new palette based image,imagecreate() returns an image identifier representing a blank image of size x_size by y_size. (http://www.weberdev.com/imagecreate)
imagecolorallocate() - Allocate a color for an image. imagecolorallocate() returns a color identifier representing the color composed of the given RGB components. red, green and blue are the values of the red, green and blue component of the requested color respectively. These parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF. imagecolorallocate() must be called to create each color that is to be used in the image represented by image. (http://www.weberdev.com/imagecolorallocate)
imagefill() - Flood fill,imagefill() performs a flood fill starting at coordinate x, y (top left is 0, 0) with color in the image. (http://www.weberdev.com/imagefill)
imagerectangle() - Draw a rectangle,imagerectangle() creates a rectangle of color col in image image starting at upper left coordinate x1, y1 and ending at bottom right coordinate x2, y2. 0, 0 is the top left corner of the image. (http://www.weberdev.com/imagerectangle)
imagestring() - draws the string s in the image identified by image with the upper-left corner at coordinates x, y (top left is 0, 0) in color col. If font is 1, 2, 3, 4 or 5, a built-in font is used. (http://www.weberdev.com/imagestring)
imagejpeg() - creates the JPEG file in filename from the image image. The image argument is the return from the imagecreatetruecolor() function. (http://www.weberdev.com/imagejpeg)
The filename argument is optional, and if left off, the raw image stream will be output directly. To skip the filename argument in order to provide a quality argument just use a NULL value. By sending an image/jpeg content-type using header(), you can create a PHP script that outputs JPEG images directly.
random_number.php
| <?php
global $number,$Scode;
$img_number = imagecreate(130,41);//Control side of Canvas
$white = imagecolorallocate($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($img_number,5,5,124,35,$black); //Control side of rectangle
ImageRectangle($img_number,0,0,129,40,$black); //Control side of rectangle
$number = get_random();
Imagestring($img_number,9,10,15,$number,$black);
header("Content-type: image/jpeg");
imagejpeg($img_number);
//Session
$Scode = $securitycode;
/*
techxcel, Open Source E-Commerce Solutions
Code by Chetankumar Akarte
*/
// Function : get_random
//
// Arguments : non
//
// Return : Random number
//
// Description : function for generate random number that use to conforms recure User Registration.
//
function get_random()
{
srand(time());
$max = getrandmax();
return rand(1,$max) + rand(1,$max) ;
}
?> | |
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| A damaged image generator (class) for validating text.
CAPTCHA - Completely Automated Public Turing test to tell Computers and Humans Apart
Categories : PHP, PHP Classes, Security, GD image library, Security | | | A captcha image allows you to prevent spam posting when users reload the page and stop bots from submitting forms automatically. This version allows you to use your own fonts (.ttf) to show the text.
Categories : PHP, Security, Graphics, GD image library | | | CAPTCHA[Image verification]
Categories : PHP, Security, GD image library, Graphics, Sessions | | | Generate image with random number (CAPTCHA)
Categories : PHP, GD image library, Graphics, Security | | | Create Thumbnails - resize an image - jpeg, jpg, gif, png to the specifed width and height in proportion without loosing out on pixcel quality.
Categories : PHP, GD image library, Graphics | | | Display a bar chart based on random values.
Categories : Graphics, PHP, GD image library, Charts and Graphs | | | Creates a CAPTCHA image in PHP, which displays 5 numbers stored in a session.
Categories : PHP, GD image library, Form Processing, Security | | | Advanced Image WaterMarker
Categories : PHP, PHP Classes, GD image library, Graphics, Object Oriented | | | Line graphics generation library written in PHP + GD library (spanish comments)
Categories : PHP, Graphics, GD image library | | | Simple PHP Bar Graph using GD library
Categories : PHP, GD image library, Graphics, Arrays | | | Simple class that uses GD to draw pie charts. After the class definition there's some sample code to demonstrate how you use the class.
Categories : Graphics, PHP, PHP Classes, GD image library, Charts and Graphs | | | Dynamic Image Authentication System in Signup Pages (CAPTCHA)
Categories : PHP, Security, GD image library | | | imageMarker v 3.00 with new advanced features
Categories : PHP, PHP Classes, Graphics, GD image library | | | Image Generation Class ( PNG Format )
Categories : PHP, GD image library, PHP Classes, Graphics | | | PHP Image Compression using GD library
Categories : PHP, Compression, GD image library, Graphics | |
| | | | matthew waygood wrote : 1677
Similar to http://www.developerfusion.co.uk/show/1951/4/
<?php
//random_number.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);
header("Content-type:image/jpeg");
imagejpeg($img_number);
?>
| | | | matthew waygood wrote : 1678
Sorry, didn`t read the next page on that article. Change my comment from "Similar" to "Exactly"
| | | | Chetankumar Akarte wrote :1679
Hi..everybody
I have this script one year,when i was facing problem to generate Random Numbar using php, my friend VIJAY gave me the above script.
i have no idea that this Similar to http://www.developerfusion.co.uk/show/1951/4/
i feel that it is unique and created by my friend i requested him and told him that i want to submit it at http://www.weberdev.com... He reply that i can..!! so i submmited it with adding explanation of script
I heartily Thanks Matthew Waygood for giving me idea about real author of the script...
and i am very Happy to give the Credit to its real Author...
Please follow link for detail and original Author`s Creation at...
http://www.developerfusion.co.uk/show/1951/1/
Title:-Image Generation on the FLY using PHP
Thank you ance more Matthew Waygood to show me my mistake. i always care to avoid such mistake in future..
Thanks & Regards...
Chetan Akarte
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