regex where input has & char at end of string

Question

I am using this regex:

.*-p(.\d+)-fun\b meaning:

.* => any char at the beginning, 
-p => static string ,
(.\d+) => number in first group,
-fun => static string ,
\b => end of string ,

My tests:

http://example.com/abcd-p48343-fun             Matched 
http://example.com/abcd-p48343-funab           not matched
http://example.com/abcd-p48343-fun&ab=1        Matched 

Why does the last test match?

It seems & char at the end string seprate them in two string. What is the solution that regex not match in http://example.com/abcd-p48343-fun&ab=1 ?

.*-p(.\d+)-fun$ also tested and not working.

Answer 1

This regex:

.*-p(.\d+)-fun$

Matches the first example only:

VB.Net code:

Dim Tests As New List(Of String)
Dim Pattern As String
Dim Parser As Regex

Tests.Add("http://example.com/abcd-p48343-fun")
Tests.Add("http://example.com/abcd-p48343-funab")
Tests.Add("http://example.com/abcd-p48343-fun&ab=1")

Pattern = ".*-p(.\d+)-fun\b"
Parser = New Regex(Pattern)
Console.WriteLine("Using pattern: " & Pattern)
For Each Test As String In Tests
    Console.WriteLine(Test & " : " & Parser.IsMatch(Test).ToString)
Next
Console.WriteLine()

Pattern = ".*-p(.\d+)-fun$"
Parser = New Regex(Pattern)
Console.WriteLine("Using pattern: " & Pattern)
For Each Test As String In Tests
    Console.WriteLine(Test & " : " & Parser.IsMatch(Test).ToString)
Next
Console.WriteLine()

Console.ReadKey()

Console output:

Using pattern: .*-p(.\d+)-fun\b
http://example.com/abcd-p48343-fun : True
http://example.com/abcd-p48343-funab : False
http://example.com/abcd-p48343-fun&ab=1 : True

Using pattern: .*-p(.\d+)-fun$
http://example.com/abcd-p48343-fun : True
http://example.com/abcd-p48343-funab : False
http://example.com/abcd-p48343-fun&ab=1 : False