Problem with PHP includes on case-sensitive file systems

Question

I've built a PHP project in Windows, and as you know in Windows fun.php and Fun.php is same but not in Linux.
Q1-> As my project will run in Linux How to solve this issue [error for file name] ?
Q2-> I need to show an error if exact file name does not exist ! How to do so ?

Example

I have this 2 PHP file in template.php and render.php
Code of render.php

include 'Template.php';

I want to get an warning so i can fix this issue [which does not create problem in Windows, but in Linux]

Answer 1

Well, if I were in that situation, I'd write a wrapper around include:

function warned_include($file)
{
    if( defined( 'DEBUG_ENV' ) ) // define this somewhere else while in dev.
    {
        foreach( explode( PATH_SEPARATOR, get_include_path() ) as $path )
        {
            // make sure the / is replaced with the OS native DIRECTORY_SEPARATOR
            $fullPath = str_replace($path .DIRECTORY_SEPARATOR.$file, '/', DIRECTORY_SEPARATOR);
            if( is_file( $fullPath ) )
            {
                $spl = new SplFileInfo( $fullPath );
                if( $spl->getPathname() != $fullPath )
                {
                    echo 'case sensitivity mismatch for ' . $spl->getPathname();
                }
                break;
            }
        }
    }
    include $file;
}

I've not had a chance to test it, but SplFileInfo gets the pathname from the OS, which means that it should have correct case sensitivity in Windows.