Locates the last occurrence of a substring or character within a string
Syntax
Usage
last = InStrRev( str, [ Any ] substring [, start ] )
Parameters
str
The string to be searched.
substring
The substring to find.
start
The position in str at which the search will begin. The first character starts at position 1.
Return Value
The position of the last occurrence of substring in str.
Description
Locates the position of the last occurrence of a substring or character within a string. If
start parameter is not given or is less than zero, the search begins at the last character.
Zero (0) is returned if:
- substring is not found, or
- either str or substring is an empty strings, or
- start is zero, or
- start is greater than the length of str.
If the
Any keyword is specified,
InStrRev returns the last occurrence of any character in
substring.
Example
' It will return 4
Print InStrRev("abcdefg", "de")
' It will return 0
Print InStrRev("abcdefg", "h")
Dim test As String
Dim idx As Integer
test = "abababab"
idx = InStrRev(test, "b")
Do While idx > 0 'if not found loop will be skipped
Print """b"" at " & idx
idx = InStrRev(Test, "b", idx - 1)
Loop
'A Unicode example:
dim text as wstring*20
text = "Привет, мир!"
print instrrev(text,"ет") ' displays 5
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Platform Differences
- The wide-character string version of InStrRev is not supported for DOS target.
Dialect Differences
- Not available in the -lang qb dialect unless referenced with the alias __Instrrev.
Differences from QB
See also