I'm looking for an OCR Library that could read english text and numbers for PHP or Python
I don't learning a new programming language just for using an OCR,
however, if I see that there isn't any other option, I guess it would be possible (please nothing .Net)
Try: http://code.google.com/p/pytesser/
It wraps this engine: http://code.google.com/p/tesseract-ocr/
To install tesseract-ocr for ubuntu :
sudo apt-get update && sudo apt-get install tesseract-ocr
To us it the, you can use the command-line or use my own OCR script