Why isn't wordnik's php api loading the required classes? - php

Question

I'm getting the following error with wordnik's php api
Fatal error: Class 'Example' not found in Swagger.php on line 212
I've edited Swagger.php to get it to work, below is the original function
function swagger_autoloader($className) {
$currentDir = substr(__FILE__, 0, strrpos(__FILE__, '/'));
if (file_exists($currentDir . '/' . $className . '.php')) {
include $currentDir . '/' . $className . '.php';
} elseif (file_exists($currentDir . '/models/' . $className . '.php')) {
include $currentDir . '/models/' . $className . '.php';
}
}
The working code I changed to is
function swagger_autoloader($className)
{
include $currentDir . '/models/' . $className . '.php';
}
MORE INFO
My file structure is as follows.
WORDNIK (contains start.php)>>>WORDNIK (contains Swagger.php)>>MODELS (contains Example.php)
I'm using wampserver 2.2 with php 5.4.3
UPDATE/EDIT
Using the following code
function swagger_autoloader($className) {
echo "dirname(__FILE__)= ",dirname(__FILE__);
$currentDir = substr(__FILE__, 0, strrpos(__FILE__, '/'));
echo "currentDir=".$currentDir."</br>";
echo "className=".$className."</br>";
echo "__FILE__=",__FILE__."<br/>";
die();
I get the results
dirname(__FILE__)=D:\wamp\www\wordnik\wordnik
currentDir=
className=Example
__FILE__=D:\wamp\www\wordnik\wordnik\Swagger.php
As suggested by vcampitelli, using either __DIR__ or dirname(__FILE__) works.
MY QUESTION
Why doesn't the original function work?
UNIMPORTANT INFO
For people struggling through the examples, here is my start.php file
<?php
require('./wordnik/Swagger.php');
require('./wordnik/WordApi.php');
require('./wordnik/AccountApi.php');
require('./wordnik/WordsApi.php');
require('./wordnik/WordListApi.php');
require('./wordnik/WordListsApi.php');
$myAPIKey = 'replace_this_with_your_real_api';
$client = new APIClient($myAPIKey, 'http://api.wordnik.com/v4');
$wordApi = new WordApi($client);
$example = $wordApi->getTopExample('irony');
print $example->text;
?>

Answer 1

What does $currentDir return? Have you tried using __DIR__ or dirname(__FILE__) (they are the same) instead of that substr?
If you are using the second example just as you posted (without declaring $currentDir), so that is the problem at your original code: $currentDir is not returning the right folder!
With the original code, which file is being included? Because, actually, I think no one is! Use echo inside those if statements to check that!

Answer 2

The original function doesn't work because it is looking for the position of a UNIX-style forward slash '/', whereas you are on Windows and have backslashes '\'. That's a bug! I'll fix the lib to use dirname(FILE) as you do. Thanks for pointing out the error.