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 FileMaker Pro Custom Functions

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DeleteVariableText ( Value ; StringStart ; StringEnd ; Pos ; Start ; End ) )

Rate this function:  

  Average rating: 4.4  (37 votes)
  Discuss this Custom Function

Daniel Wood, Digital Fusion Ltd

Substitute out blocks of text, defined by a start/end string of characters - whose inner contents are of variable width

Sample Input:
RectangleArea ( This is (ID12)substituting out (ID9282)all instances of (ID)variable length bracketed stuff ; "(" ; ")" ; 1 ; "" ; "" )
Sample Output:
This is substituting out all instances of variable length bracketed stuff

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


This function enables you to substitute out blocks of text from a field where only the start and end characters of those blocks are known. For example, you might wish to substitute out all pieces of text which are enclosed in brackets, but whose inner contents of those brackets are unknown.

The function recursively by traversing the field, storing positions of the start & end characters when found - and when both a start and end are found, the block is removed, and traversal continues on the new piece of text.

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


5 most recent comments | Show all 7 comments

error in code:
StartPosition = If ( Middle ( Value ; Pos ; 3 ) = StringStart and IsEmpty ( Start ) ; Pos ; Start ) ;

should be 1 not 3...

Thanks for function though.

Thomas Seidler, London
September 02, 2012 9:55am

Just wanted to say thanks! I think it is wonderful that you would share this and it has saved me some real headaches. Worked a treat!

Katy Butterworth, New Zealand
July 20, 2014 4:25pm

No problem :) Hope all is well!

Daniel Wood, Christchurch, New Zealand
July 20, 2014 4:29pm

Sorry but there is missing the information what the Vars are for

Value = (Text?)
StringStart = ?
StringEnd = ?
Pos = ?
Start = ?
End = ?

Also the Example does not wor

Martin, Berlin
July 14, 2017 4:43pm

hi Martin,

Value - the text string you want to perform the function on
StringStart - This is the start string identifying the start of the block(s) of text to remove.
StringEnd - This is the end string identifying the end of the block(s) of text to remove.

Pos - Always set to 1 on first running the function.
Start/End - you can leave blank, these are parameters used in the recursion.

Unfortunately I have lost my password so cannot edit the function, but if you look up a few comments to a post by Thomas Seidler, you'll find the bug in the code that you can fix for the function to work.


Daniel Wood, New Zealand
July 14, 2017 9:08pm

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

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