Question

我有一个看起来像这样的表单。现在，客户已要求将其转换为以XML格式查询和发送响应的格式。有人可以让我在PHP中使用适当的教程或示例。似乎有这样

<form action="" method='post'> 
<table> 
<tr><td>User Number </td><td><input type='text' name='task_user_no' value='<?=$task_user_no?>'></td></tr> 
<tr><td>Date </td><td><input type='text' name='task_date' value='<?=$task_date?>'> (YYYYMMDD)</td></tr> 
<tr><td>From Time </td><td><input type='text' name='task_from_time' value='<?=$task_from_time?>'>(HHMM)</td></tr> 
<tr><td>To Time </td><td><input type='text' name='task_to_time' value='<?=$task_to_time?>'>(HHMM)</td></tr> 
<tr><td>Message </td><td><input type='text' name='task_message' value='<?=$task_message?>'></td></tr> 
<tr><td>&nbsp;</td><td><input type='submit' value='submit' name='submit' ></td></tr> 
</form> 

Answer 1

嘛，因为你还没有提供细节生病放下基础：

1. cron作业，用户交互或其他触发器调用远程服务器（RS）上的请求。
2. php scrip t建立一个查询发送到托管您的站点/应用程序的应用程序服务器（AS）
3. AS解析请求变量并为数据存储构建查询。
4. 的AS使得对数据存储查询，并将结果转换为XML格式
5. 的AS发送响应为XML的RS
6. 的RS解析XML和做什么它需要与做数据包含

所以给了这些步骤，一些示例脚本：

RS服务器脚本

// set up params for query: 

$params = array(
    'task_no' => '0000000' 
    'task_date' => 'YYYYMMDD', 
    'task_from_time' => 'HHMM', 
    'task_to_time' => 'HHMM', 
    'taks_message' => 'The Message' 
); 

$client = curl_init('http://remote-server.com/task.php'); 

// return the response instead of outputting it 
curl_setopt($client, CURLOPT_RETURNTRANSFER, true); 

// make it a POST request, use CURLOPT_GET for Get requests 
curl_setopt($client, CURLOPT_POST, true); 

// set the data to send.. if using get then intstead use http_build_query($params) and append the resuult to the URL used in curl_init 
curl_setopt($client, CURLOPT_POSTFIELDS, $params); 

$response = curl_exec($client); 

// load the response as xml 

try 
{ 
    $responseXml = new SimpleXmlElement($response); 

    // do stuff here with the result see SimpleXml documentation for working with the xml nodes 

    exit; 
} 
catch(Exception $e) 
{ 
    // log message from exception 

    // exit with a non-zero status code may be important for cron or a shell invocation 
    exit($e->getCode()); 
} 

的AS脚本task.php

// Im going to use PDO for simplicity sake 
$db = new PDO($dsn, $user, $pass); 
$query = 'SELECT * from table_name' 
     .'WHERE task_user_no = :task_user_no' 
     .'AND task_date = :task_date' 
     .'AND task_from_time = :task_from_time' 
     .'AND task_to_time = :task_to_time'; 

$stmt = $db->prepare($query); 
$params = $_POST; // make a copy for binding 
$xml = new DOMDocument('1.0', 'UTF-8'); 

// create some basic elements 
$response = $xml->createElement('response'); 
$info = $xml->createElement('info'); 
$results = $xml->createElement('results'); 

// set up an array we can append later if there are errors 
$errors = array(); 

foreach($params as $field => $value) 
{ 
    $paramName = ':' . $field; 

    switch($field) 
    { 
     case 'task_user_no': 
     $paramType = PDO::PARAM_INT; // assuming an int pk/fk 
     break; 
     default: 
     $paramType = PDO::PARAM_STR; // assuming string for all others 
     break; 
    } 

    if(!$stmt->bindParam($paramName, $param[$field], $paramType)) 
    { 

     $errors[] = $xml->createElement('error', sprintf(
      'Value for (%s) does not exist or is not of the proper type (%s).' 
      $field, 
      $paramType 
     )); 
    } 
} 

if(!$stmt->execute() && ($pdoError = $stmt->errorCode())) 
{ 
    $errors[] = sprintf(
     'There was an error retrieving your data, Error (%s)', 
     $pdoError 
    ); 
} 


while(false !== ($record = $stmt->fetch(PDO::FETCH_ASSOC))) 
{ 
    $task = $xml->createElement('task'); 

    foreach($record as $col => $val) 
    { 
    $task->appendChild($xml->createElement($col, $val)); 

    $results->appendChild($task); 
    } 
} 

if(!empty($errors)) 
{ 
    $errorsElement = $xml->createElement('errors'); 

    foreach($errors as $error) 
    { 
     $errorsElement->appendChild($xml->createElement('error', $error)); 
    } 

    $info->appendChild($errorsElement); 
} 

$response->appendChild($info); 
$response->appendChild($results); 
$xml->appendChild($response); 

$responseStr = $xml->saveXml(); 

header('Content-type: text/xml'); 
header('Content-length: '. strlen($responseStr)); 
header('HTTP/1.1 200 Ok'); 
print $responseStr; 
exit; 

当然你也可以使用现有的库，以进一步simplicty东西...例如，而不是使用curl你可以使用Zend_Http_Client（我肯定会，因为它推荐不仅可以使用curl，而且还可以使用fopen和直接插座）。或者你可以使用Zend_Dom_Query这个基本上允许你以类似于jQuery（css选择器和什么不是xPath）的方式处理xml响应。

Answer 2

看看jQuery的Ajax的功能的许多方面

Doc