Added example.

OnlineEditorsExample/OnlineEditorsExamplePHP/ajax.php

@@ -0,0 +1,46 @@
+<?php
+
+require( dirname(__FILE__) . '/config.php' );
+    
+//Function to check if the request is an AJAX request
+function is_ajax() {
+    return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest';
+}
+
+function get_http_origin() {
+	$origin = '';
+	if ( ! empty ( $_SERVER[ 'HTTP_ORIGIN' ] ) )
+		$origin = $_SERVER[ 'HTTP_ORIGIN' ];
+	return $origin;
+}
+
+function nocache_headers() {
+    $headers = array(
+		'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
+		'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
+		'Pragma' => 'no-cache',
+	);
+	$headers['Last-Modified'] = false;
+
+
+	unset( $headers['Last-Modified'] );
+
+	// In PHP 5.3+, make sure we are not sending a Last-Modified header.
+	if ( function_exists( 'header_remove' ) ) {
+		@header_remove( 'Last-Modified' );
+	} else {
+		// In PHP 5.2, send an empty Last-Modified header, but only as a
+		// last resort to override a header already sent. #WP23021
+		foreach ( headers_list() as $header ) {
+			if ( 0 === stripos( $header, 'Last-Modified' ) ) {
+				$headers['Last-Modified'] = '';
+				break;
+			}
+		}
+	}
+
+	foreach( $headers as $name => $field_value )
+		@header("{$name}: {$field_value}");
+}
+
+?>