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JpGraph with Anti-spam challenge feature

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Thu, 03/17/2005 - 23:38 — Christoph C. Cemper

JpGraph, famous PHP graph solution now also supports the easy creation of Anti-Spam images. This is an image contains (some random) text which is very, very hard for any OCR program to decipher but easy for a human to read.

As you will know, this is used to prevent automatic signup to mailing lists and various on-line services.

JpGraph – Features

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