Debugging relative links in php

First I should mention that I’ve gotten good results when using the get_cwd() function.  With it, I can tell what directory I am starting from, and from there build the appropriate relative paths.

It’s simple to use.

echo getcwd();

Run the script, and you’ll know where your starting point is.

That said, beware of the register_shutdown_function().  I noticed the get_cwd() result changed while inside of this function.  I found a link with a workaround, but the gist of it is that the working directory of the script can change.

http://stackoverflow.com/questions/10861606/write-to-file-with-register-shutdown-function

Here’s a sample you can use:

<?php

        echo "Using Dir: " . __DIR__;
        echo "\n\n";
        echo "Using Get Current Working Directory: " . getcwd();
        echo "\n\n";
        echo "Using Get Include Path: " . get_include_path();
        echo "\n\n";

        $cwd = getcwd();

        register_shutdown_function(function(){
            echo "GetCWD inside of register_shutdown_function:" . getcwd();
               exit(1);
        });

        function throw_error($message)
        {
            trigger_error($message, E_USER_ERROR);
            exit(1);
        }
?>