Question

This seems to be a very odd problem that I cannot figure out for the life of me. I have a path (string) that looks like this:

D:\development\php\bchat\chat\index.php

I need to check if the file in question is a PHP file. I figure the most logical way is to take a substring starting from the . to the end of the string and see if it == .php

So i tried:

bool isphp = (path.Substring(path.LastIndexOf('.')) == ".php") ? true : false;

This always returned false. I thought maybe there was a trailing space at the end screwing me up so i put a TrimEnd() on path before it. But that didn’t change anything. So i tried this:

bool isphp = (path.EndsWith(".php") == true) ? true : false;

This also always returns false.

EDIT
I have now also tried this:

bool isphp = (Path.GetExtension(path) == ".php");

But this also returns false.

Answer 1

The following code works fine on my machine:

    public static void Main()
    {
        string path = @"D:\development\php\bchat\chat\index.php";
        bool isPhp = path.EndsWith(".php");
        Console.WriteLine(isPhp);
    }

So I would guess there is something else about your string that is causing it not to work. Maybe it is a case thing in which case add StringComparison.InvariantCultureIgnoreCase to your EndsWith call like this.

    public static void Main()
    {
        string path = @"D:\development\php\bchat\chat\index.pHp";
        bool isPhp = path.EndsWith(".php", StringComparison.OrdinalIgnoreCase);
        Console.WriteLine(isPhp);
    }

If that doesn’t work put a break point on the comparison line and then type this into the Immediate window:

path[path.Length-1]

You should get this as a result:

112 'p'

If you don’t you can tell that your path does not end with a standard p character.