在线评估有“API回调网址”，当学生提交我需要捕获到joomla数据库用户帐户的测验时，它会调用joomla root中的网页/脚本/ php文件来传递信息（异步）。
我需要一个脚本来放入这个php文件来检查用户名是否不存在然后创建用户（作为注册组）并添加信息。如果存在用户名，则只需将信息添加到他的帐户（此处的密钥为用户名）。学生现在可以登录Joomla并查看测试历史记录。
这些是在线评估支持的变量：
username :the username of the user, if available.
firstname :the first name of the user, if available.
lastname :the last name of the user, if available.
cf_label :the value of this custom field (for example, cf_company if you have a custom field labelled mpany).
title :the title of the publication.
accesscode :the access code entered by the user, if available.
id :the id of the response.
ispreview :indicates if it's a preview (1) or a real response (0).
pin :the PIN of the publication (empty if it's a preview).
score :the score (points) got by the user.
scorepercent :the score (percent) got by the user.
startdate :the date/time (UTC, yyyy-mm-ddThh:mm:ss) when the response was started.
enddate :the date/time (UTC, yyyy-mm-ddThh:mm:ss) when the response was completed.
status :the status of the response (2=completed, 3=passed, 4=not passed, 5=to be graded).
gr_label :the value of this custom grade (for example, gr_passed if you have a custom grade labelled passed).
maxscore :the maximum score available for the publication.
minscore :the minimum score available for the publication.
它们提供了两个方法（POST）和（GET）的一般示例：
<?php
// === GET SINGLE PARAMETER (VIA POST) ===
$accessCode = $_POST["accesscode"];
$cfCompany = $_POST["cf_company"];
echo "Access Code: ".$accessCode."<br />";
echo "Company (Custom Field): ".$cfCompany."<br />";
// === GET SINGLE PARAMETER (VIA GET) ===
$pin = $_GET["pin"];
$grPassed = $_GET["gr_passed"];
echo "Pin: ".$pin."<br />";
echo "Grade: ".$grPassed."<br />";
// === GET ALL PARAMETERS (VIA POST) ===
foreach ($_POST as $key => $value)
echo htmlspecialchars($key).": ".htmlspecialchars($value)."<br>";
?>
你能帮忙创建脚本吗？ 理解的，
UPDATE1 ： 我从diadem.in获得了这个脚本并按照我的理解将其放在html中，但是这是正确的，如何通过帖子检查用户名，就像上面的例子一样!!
<!DOCTYPE html>
<html>
<body>
<script>
define( '_JEXEC', 1 );
define('JPATH_BASE', dirname(__FILE__) );//this is when we are in the root
define( 'DS', DIRECTORY_SEPARATOR );
require_once ( JPATH_BASE .DS.'includes'.DS.'defines.php' );
require_once ( JPATH_BASE .DS.'includes'.DS.'framework.php' );
$mainframe =& JFactory::getApplication('site');
$mainframe->initialise();
//Check for request forgeries: comment this since tokens are not generated in the html
//JRequest::checkToken() or jexit( 'Invalid Token' );
//Get required system objects
$user = clone(JFactory::getUser());
$pathway = & $mainframe->getPathway();
$config = & JFactory::getConfig();
$authorize = & JFactory::getACL();
$document = & JFactory::getDocument();
//Initialize new usertype setting
$newUsertype = $usersConfig->get( 'new_usertype' );
if (!$newUsertype)
{
$newUsertype = 'Registered';
}
//Bind the post array to the user object
if (!$user->bind( JRequest::get('post'), 'usertype' ))
{
JError::raiseError( 500, $user->getError());
}
//Set some initial user values
$user->set('id', 0);
$user->set('usertype', '');
$user->set('gid', $authorize->get_group_id( '', $newUsertype, 'ARO' ));
$date =& JFactory::getDate();
$user->set('registerDate', $date->toMySQL());
//Save the details of the user
$user->save();
</script>
</body>
</html>
Update2：我试过这个，但没有运气..
<?php
function register_user ($username, $email, $firstname, $lastname, $password){
//This is the original code which I comment to get via POST
//$firstname = $email; // generate $firstname
//$lastname = ''; // generate $lastname
//$username = $email; // username is the same as email
// === GET SINGLE PARAMETER (VIA POST) ===
$username = $_POST["username"];
$email = $_POST["email"];
$firstname = $_POST["firstname"];
$lastname = $_POST["lastname"];
$password = $_POST["username"];
/*
I handle this code as if it is a snippet of a method or function!!
First set up some variables/objects */
// get the ACL
$acl =& JFactory::getACL();
/* get the com_user params */
jimport('joomla.application.component.helper'); // include libraries/application/component/helper.php
$usersParams = &JComponentHelper::getParams( 'com_users' ); // load the Params
// "generate" a new JUser Object
$user = JFactory::getUser(0); // it's important to set the "0" otherwise your admin user information will be loaded
$data = array(); // array for all user settings
// get the default usertype
$usertype = $usersParams->get( 'new_usertype' );
if (!$usertype) {
$usertype = 'Registered';
}
// set up the "main" user information
//original logic of name creation
//$data['name'] = $firstname.' '.$lastname; // add first- and lastname
$data['name'] = $firstname.$lastname; // add first- and lastname
$data['username'] = $username; // add username
$data['email'] = $email; // add email
$data['gid'] = $acl->get_group_id( '', $usertype, 'ARO' ); // generate the gid from the usertype
/* no need to add the usertype, it will be generated automaticaly from the gid */
$data['password'] = $password; // set the password
$data['password2'] = $password; // confirm the password
$data['sendEmail'] = 1; // should the user receive system mails?
/* Now we can decide, if the user will need an activation */
$useractivation = $usersParams->get( 'useractivation' ); // in this example, we load the config-setting
if ($useractivation == 1) { // yeah we want an activation
jimport('joomla.user.helper'); // include libraries/user/helper.php
$data['block'] = 1; // block the User
$data['activation'] =JUtility::getHash( JUserHelper::genRandomPassword() ); // set activation hash (don't forget to send an activation email)
}
else { // no we need no activation
$data['block'] = 1; // don't block the user
}
if (!$user->bind($data)) { // now bind the data to the JUser Object, if it not works....
JError::raiseWarning('', JText::_( $user->getError())); // ...raise an Warning
return false; // if you're in a method/function return false
}
if (!$user->save()) { // if the user is NOT saved...
JError::raiseWarning('', JText::_( $user->getError())); // ...raise an Warning
return false; // if you're in a method/function return false
}
return $user; // else return the new JUser object
}
$email = JRequest::getVar('email');
$password = JRequest::getVar('password');
//echo 'User registration...'.'<br/>';
register_user($email, $password);
//echo '<br/>'.'User registration is completed'.'<br/>';
?>