FUNCTION:  InStrRev( )
Implemented in version 2.0
 
InStrRev(String, Substring, Start, Compare)
 
The InStrRev function returns the numeric position of the first occurrence of a specified substring within a specified string when starting from the end (right end) of the string. You can have the search for the substring be sensitive to the case (upper versus lower), or not. The default is to be case sensitive (binary comparison).
 
An output of zero indicates no match.
 
There are two mandatory arguments.
 
String
 
The String argument is the string in which you will search.
 
Substring
 
The Substring argument is the substring you are searching for.
 
Code:
<% =InStrRev("ABCDE ABCDE", "C") %>
 
Output:
9
 
There are two optional arguments.
 
Start
 
The optional Start argument is the numeric position, counted from the left, which defines where to start the search for the substring.
 
In the example the search begins at postion 4, counted from the left, and the search goes from the right to left.
 
Code:
<% =InStrRev("ABCDE ABCDE", "C", 4) %>
 
Output:
3
 
Compare
 
The optional Compare argument can be used to set whether the search for the substring is case sensitive (upper versus lower), or not. You must only use either the constant or value of the COMPARISON CONSTANTS.
 
CONSTANT VALUE DESCRIPTION
VBBINARYCOMPARE 0 Binary comparison
(case sensitive)
VBTEXTCOMPARE 1 Text Comparison
(case insensitive)
VBDATABASECOMPARE 2 Compare information inside database

 
In the example, by using VBBinaryCompare, or 0, for the Compare argument, all upper/lower case differences are obeyed in both the search.
 
Code:
<% =InStrRev("ABCDE ABCDE", "c", 4, 0) %>
 
Output:
0
 
In the example, by using VBTextCompare, or 1, for the Compare argument, all upper/lower case differences are ignored in the search.
 
Code:
<% =InStrRev("ABCDE ABCDE", "c", 4, VBTextCompare %>
 
Output:
3

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