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Regular Expression Details

Title Test Find Empty, Nothing, Nada
Expression
^.{0,0}
Description
Only accepts nothing. I know, sounds stupid, but useful for "Invisible Textbox Captcha". Bots will fill in a hidden textbox, and this expression busts them.
Matches
"only an empty string"
Non-Matches
absolutely any text whatsoever
Author Rating: Not yet rated. Joe Hakooz
Source
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