Graphics: SecurityImage
andrew (contact me)
This class can be used to generate images for CAPTCHA validation.
It creates a random text with a limited length of letters and digits and renders it in an image using one of several possible TrueType fonts.
Several background images may be used randomly to obfuscate the text.
The class also renders random circles to also obfuscate the text.
The image is generated in PNG format as the current script output.
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