Notice: Undefined index - Solving with isset?

Question

Notice: Undefined index: extension  in /var/www/.. on line 187

    //185 - $f_name = $this->filename;
    //186 - $path_parts = pathinfo($f_name);
    //187 - $file_ext = $path_parts['extension'];

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After some googleing I've seen alot of Isset being used. But I'm in doubt, about how to use it, in this case? Is it even going to solve the problem?

Answer 1

Yes, you can use isset in this case. You first check if the key is set before trying to access it. I would use the ternary operator to set a default value if you need to.

$file_ext = isset($path_parts['extension']) ? $path_parts['extension'] : null;