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 FileMaker Pro Custom Functions

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StripCharacters ( field )

Rate this function:  

  Average rating: 4.6  (20 votes)
  Discuss this Custom Function

Michael Rocharde, Ad-Minimum

Removes formatted characters from a phone number

Sample Input:
(970) 728-3819
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


Sending out SMS messages from FileMaker, using the HTTP Post function and a Twilio account is very easy but you need to have the cell phone number stripped down to 10 characters. This function removes the normal characters found in a formatted phone number.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


Why not just use Filter ( text ; "0123456789" ) ? I ran some test and Substitute seems to be (insignificantly) slower. Also, Filter would be less error prone if all you need is the numbers.

Hisc, Brazil
October 12, 2015 5:51pm

That's a very good point. I should have thought of using Filter. Thanks.

Michael Rocharde, Denver, CO
October 12, 2015 8:48pm

Make a comment about this Custom Function (please try to keep it brief & to the point). Anyone can post:

Your Name:
characters left. If you paste in more than 1500 characters, it will be truncated. Discuss the function - advertisements and other useless posts will be deleted.
Answer 7 + 8 =
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