Merge pull request parse-community#2 from niraj-shah/master

Added autoload for those that don't want to use Compose

Author: Fosco Marotto

README.md

@@ -25,6 +25,17 @@ and then require it from your PHP script:
 require 'vendor/autoload.php';
 ```
 
+Alternative Method
+------------------
+
+If you don't want to use Composer, you can include the ```autoload.php```
+file in your code to automatically load the Parse SDK classes.
+
+```php
+require 'autoload.php';
+```
+
+
 Usage
 -----
 

autoload.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * You only need this file if you are not using composer.
+ */
+
+if (version_compare(PHP_VERSION, '5.4.0', '<')) {
+  throw new Exception('The Parse SDK requires PHP version 5.4 or higher.');
+}
+
+/**
+ * Register the autoloader for the Parse SDK
+ * Based off the official PSR-4 autoloader example found here:
+ * https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-4-autoloader-examples.md
+ *
+ * @param string $class The fully-qualified class name.
+ * @return void
+ */
+spl_autoload_register(function ($class)
+{
+  // Parse class prefix
+  $prefix = 'Parse\\';
+
+  // base directory for the namespace prefix
+  $base_dir = defined('PARSE_SDK_DIR') ? PARSE_SDK_DIR : __DIR__ . '/src/Parse/';
+
+  // does the class use the namespace prefix?
+  $len = strlen( $prefix );
+  if ( strncmp($prefix, $class, $len) !== 0 ) {
+    // no, move to the next registered autoloader
+    return;
+  }
+
+  // get the relative class name
+  $relative_class = substr( $class, $len );
+
+  // replace the namespace prefix with the base directory, replace namespace
+  // separators with directory separators in the relative class name, append
+  // with .php
+  $file = $base_dir . str_replace( '\\', '/', $relative_class ) . '.php';
+  
+  // echo $relative_class . '<br/>';
+
+  // if the file exists, require it
+  if ( file_exists( $file ) ) {
+    require $file;
+  }
+});