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Simple function to enforce whitelist (ensure that a string includes only certain characters) and blacklist (ensure that a string absolutely does not include certain characters).

Want to make sure that a string includes only certain characters? Create a whitelist. Want to make sure that a string absolutely does not include certain characters? Create a blacklist. Both are easy to do with this simple function and structure.



version 1.0.0 (stable)
released on 17 August 2007




Verified by

Verified on


Verified by

Ted Teah

Verified on

21 August 2007

Leaders and contributors

Mike Henderson Maintainer

Resources and communication

Software prerequisites

This entry (in part or in whole) was last reviewed on 6 January 2017.


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