A single XML response may contain multiple commands, which will executed in the order they were added to the response. For example, let's say that a user clicks on a button in your application. The onclick event calls the javascript wrapper for a PHP function. That wrapper sends an asynchronous request to the server through XMLHttpRequest where xajax calls the PHP function. The PHP function does a database lookup, some data manipulation, or serialization. You use the xajaxResponse class to generate an xajax XML response containing multiple commands to send back to the xajax message pump to be executed:

    $objResponse = new xajaxResponse();

    $objResponse.addAssign("myInput1","value",$DataFromDatabase);

    $objResponse.addAssign("myInput1","style.color","red");

    $objResponse.addAppend("myDiv1","innerHTML",$DataFromDatabase2);

    $objResponse.addPrepend("myDiv2","innerHTML",$DataFromDatabase3);

    $objResponse.addReplace("myDiv3","innerHTML","xajax","<strong>xajax</strong>");

    $objResponse.addScript("var x = prompt("Enter Your Name");");

           

    return $objResponse->getXML();

 

$objResponse = new xajaxResponse();

    $objResponse.addAssign("myInput1","value",$DataFromDatabase);

$objResponse.addAssign("myInput1","style.color","red");

$objResponse.addAppend("myDiv1","innerHTML",$DataFromDatabase2);

$objResponse.addPrepend("myDiv2","innerHTML",$DataFromDatabase3);

$objResponse.addReplace("myDiv3","innerHTML","xajax","<strong>xajax</strong>");

$objResponse.addScript("var x = prompt("Enter Your Name");");

return $objResponse->getXML();

xajax消息分析器将会解析XML消息，并执行以下工作:

The xajax message pump would parse the XML message and perform the following:

所有这些都由构成的PHP函数在服务器端执行并返回xajax的XML响应.

All of this is implemented on the server side in the PHP function by forming and returning an xajax XML response.

Xajax使得异步处理表单数句非常非常的简单. xajax.getFormValues()方法会自动的从表单提取数据，并作为一个参数提交给xajax注册的PHP函数.

xajax.getFormValues() 仅仅需要一个参数, 可以是你需要处理得表单的id, 或者是一个实际的表单对象. 你也可以使用xajax.getFormValues作为一个参数给xajax 函数, 例如:

xajax_processFormData(xajax.getFormValues('formId'));

xajax 会生成一个与表单数据对应的请求字符串给xajax服务器解析，然后以一个与表单数据对应的数组传递给PHP函数，就想你提交表单使用PHP的$_GET数组那么简单.

Xajax可以处理类似普通多维数组或者联合数组(哈希数组)等形式的复杂输入名字. 例如, 如果一个表单有三个多选框(checkboxes)并且都命名为 "checkbox[]", 但是值分别为 "check1", "check2", 和 "check3", 然后使用 xajax.getFormValues 函数作为参数传递给xajax 函数, 则 PHP 函数会接受到一个如下的数组:

array (

  'checkbox' =>

  array (

    0 => 'check1',

    1 => 'check2',

    2 => 'check3',

  ),

)

作为函数参数的数组的结构与传统意义上提交表单之后的$_GET数组的结构相同. 你可以访问数组之中的checkbox 的数据: $aFormData['checkbox'][0]

xajax makes processing form data asynchronously extremely easy. The xajax.getFormValues() method can be used to automatically extract the data from a form and pass it as a parameter to a PHP function you have registered with xajax.

xajax.getFormValues() takes one argument, which can be either the id of the form you want to process, or the actual form object. You use xajax.getFormValues as a parameter to your xajax function, like this:

xajax_processFormData(xajax.getFormValues('formId'));

xajax generates a query string representing the form data which is parsed by the xajax server and passed to your PHP function as an array representing the form data, just as if you had submitted the form and used the PHP $_GET array.

xajax will even handle complex input names to generate multidimensional and associative arrays. For instance, if you have a form with three checkboxes and you give them all the name "checkbox[]", but different values like "check1", "check2", and "check3", and you use the xajax.getFormValues function as a parameter to your xajax function, the PHP function will receive and array that looks like this:

array (

  'checkbox' =>

  array (

    0 => 'check1',

    1 => 'check2',

    2 => 'check3',

  ),

)

The array argument to your function mirrors the structure that the $_GET array would have if you were to submit the form traditionally. You can then access the checkbox data in the array like this:

$aFormData['checkbox'][0]