Question

请帮我在php中完成这个过程，以便从变量中获取数据。在这种情况下，我创建了一个用于创建xml文件的php文件。这里我有数据，即频道，我希望我的孩子将在该频道中的每个家长输入数据。请看我的代码：

<?php
$dbhost = "localhost";
$dbuser = "root";
$dbpass = "";
$dbname = "db_epg";
mysql_connect($dbhost,$dbuser,$dbpass);
mysql_select_db($dbname);


$sql = "select distinct(channel_name) FROM epg";
$q   = mysql_query($sql) or die(mysql_error());
$xml = "<timetable start='00:00' end='24:00' title='Friday, September 28th, 2011'>";

while($r = mysql_fetch_array($q)){
     $CN   = $r['channel_name'];
     $xml .= "<channel>".$CN."</channel>";  


}   

    $xml .= "</timetable>";
    $sxe = new SimpleXMLElement($xml);
    $sxe->asXML("epg.xml");

    ?>

我的代码的结果是：http://s9.postimage.org/rjsodf9mn/result.png

如果我想在每个数据通道中进行循环，那么没有关于儿童的数据，那我该怎么办？

我已尝试在此中部分执行其他查询：

while($r = mysql_fetch_array($q)){
$CN         = $r['channel_name'];
$xml .= "<channel>".$CN."</channel>";   

$sql2 = "select * FROM epg where channel_name='".$CN."'";
$q2  = mysql_query($sql2) or die(mysql_error());

while($r2 = mysql_fetch_array($q2)){
    $Mulai      = date('H:i', strtotime($r2['waktu_mulai']));
    $Selesai    = date('H:i', strtotime($r2['waktu_akhir']));
    $Title      = $r2['judul'];
    $Desk       = $r2['sinopsis'];

      $xml .= "<event start='".$Mulai."' end='".$Selesai."'>";
      $xml .= "<title>".$Title."</title>";
      $xml .= "<description>".$Desk."</description>"; 
      $xml .= "</event>";   
    }


}

但我失败了。有人能帮助我吗？

Answer 1

尝试修改您的代码，如下所示，请检查语法错误，因为我没有机会尝试它：）

while ($r = mysql_fetch_array($q)) {
   // open channel header
   $CN  = $r['channel_name'];
   $xml .= "<channel name='".$CN."'>";   

   // event details for channel
   $sql2 = "select * FROM epg where channel_name='".$CN."'";
   $q2  = mysql_query($sql2) or die(mysql_error());
   while($r2 = mysql_fetch_array($q2)) {
      $Mulai      = date('H:i', strtotime($r2['waktu_mulai']));
      $Selesai    = date('H:i', strtotime($r2['waktu_akhir']));
      $Title      = $r2['judul'];
      $Desk       = $r2['sinopsis'];
      $xml .= "<event start='".$Mulai."' end='".$Selesai."'>";
      $xml .= "<title>".$Title."</title>";
      $xml .= "<description>".$Desk."</description>"; 
      $xml .= "</event>";   
   }

   // close channel
   $xml .= "</channel>";   
}

您可能还会在此处看到代码the code here

双查询从数据库中检索数据

1 个答案: