securimage.php File Reference

Go to the source code of this file.

Data Structures
class	Securimage
class	Securimage_Color

Namespaces
namespace	Securimage
	Project: Securimage: A PHP class for creating and managing form CAPTCHA images File: securimage.php

Variables
	if (!defined( 'SI_IMAGE_JPEG')) define( 'SI_IMAGE_JPEG'
	ChangeLog. More...

Variable Documentation

if

if(!defined('SI_IMAGE_GIF')) define('SI_IMAGE_GIF'

(

!

defined 'SI_IMAGE_JPEG'

)

ChangeLog.

Output images in GIF format (not recommended) Must have GD >= 2.0.28!

Output images in PNG format.

2.0.1

• Add support for browsers with cookies disabled (requires php5, sqlite) maps users to md5 hashed ip addresses and md5 hashed codes for security
• Add fallback to gd fonts if ttf support is not enabled or font file not found (Mike Challis http://www.642weather.com/weather/scripts.php)
• Check for previous definition of image type constants (Mike Challis)
• Fix mime type settings for audio output
• Fixed color allocation issues with multiple colors and background images, consolidate allocation to one function
• Ability to let codes expire after a given length of time
• Allow HTML color codes to be passed to Securimage_Color (suggested by Mike Challis)

2.0.0

• Add mathematical distortion to characters (using code from HKCaptcha)
• Improved session support
• Added Securimage_Color class for easier color definitions
• Add distortion to audio output to prevent binary comparison attack (proposed by Sven "SavageTiger" Hagemann [insecurity.nl])
• Flash button to stream mp3 audio (Douglas Walsh www.douglaswalsh.net)
• Audio output is mp3 format by default
• Change font to AlteHaasGrotesk by yann le coroller
• Some code cleanup

1.0.4 (unreleased)

• Ability to output audible codes in mp3 format to stream from flash

1.0.3.1

• Error reading from wordlist in some cases caused words to be cut off 1 letter short

1.0.3

• Removed shadow_text from code which could cause an undefined property error due to removal from previous version

1.0.2

• Audible CAPTCHA Code wav files
• Create codes from a word list instead of random strings

1.0

• Added the ability to use a selected character set, rather than a-z0-9 only.
• Added the multi-color text option to use different colors for each letter.
• Switched to automatic session handling instead of using files for code storage
• Added GD Font support if ttf support is not available. Can use internal GD fonts or load new ones.
• Added the ability to set line thickness
• Added option for drawing arced lines over letters
• Added ability to choose image type for output Output images in JPEG format

Definition at line 86 of file securimage.php.