function ExtractUrlFileName(const AUrl: string): string;
var
i: Integer;
begin
i := LastDelimiter('/', AUrl);
Result := Copy(AUrl, i + 1, Length(AUrl) - (i));
end;
procedure TForm1.Button1Click(Sender: TObject);
var
s: string;
begin
s := ExtractUrlFileName('http://www.delphimania.de/index.php');
ShowMessage(s); //index.php
end
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