Instrrev

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InStrRev

Returns the position of the last match, or 0 if there is none.

Syntax

Declare Function InStrRev ( ByRef str As Const String, [ Any ] ByRef substring As Const String, ByVal start As Integer = -1 ) As Integer
Declare Function InStrRev ( ByRef str As Const WString, [ Any ] ByRef substring As Const WString, ByVal start As Integer = -1 ) As Integer

Parameters

• str
• substring
• start
• 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:

If the Any keyword is specified, InStrRev returns the last occurrence of any character in substring.

Return Value

The position of the last occurrence of substring in str.

Remarks

Usage

last = InStrRev( str, [ Any ] substring [, start ] )

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

• New to FreeBASIC

See also

• InStr
• Mid (Function)

Examples

' 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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Category: String Functions
Kind: function

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Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.