VBScript stristr function

A VBScript equivalent of PHP’s stristr

Function stristr( haystack, needle, before_needle )

    Dim pos
    If varType(before_needle) <> 11 Then before_needle = false

    pos = Instr(1,haystack,needle,vbTextCompare)

    If pos <= 0 Then
        stristr = false
        If before_needle Then
            stristr = Mid(haystack,1,pos-1)
            stristr = Mid(haystack,pos)
        End If
    End If

End Function

Please also note that php.vbs offers community built functions and goes by the McDonald’s Theory. We’ll put online functions that are far from perfect, in the hopes to spark better contributions. Do you have one? Then please just:

Other PHP functions in the strings extension