关于XML错误,高手请进

[chengcharect]

<?php
include_once ('admin_global.php');
header ( 'Content-Type:text/xml; charset=gbk' );
if ($_GET["users"]) {
	$login_sql = "select * from klm_users where user_grade=".$_GET['users'];
	echo $login_sql;
	$result = $db->query($login_sql);
	$header = "<root>";   
	$end = "</root>";
	while ( $row = $db->fetch_array ($result)) {
	 $xml.= "<?xml version=\"1.0\"?><row><value>" . $row ["user_grade"] . "</value><text>" . $row ["user_science"] . "</text></row>";
  	}
	$xml = $header.$xml.$end;
	//echo $xml;

}
exit ();
?>

这段代码错误在什么地方,请高手指教.跪谢

[chengcharect]

提示语法错误!
<br/>
<b>Parse error</b>:syntax error,unexpected T_CONCAT_EQUAL in<b>D:\wamp\www\KLMExam\admin\user_xml/php</b> on line <b>17</b><br />

[kyzy_yy_pm]

17行是哪行？

[chengcharect]

[Quote=引用 8 楼 kyzy_yy_pm 的回复:]
17行是哪行？
[/Quote]
xml.= "<?xml version=\"1.0\"?>";

[「已注销」]

楼主搞笑，就算再是新手，最基本的东西你也要掌握，自己细心一点，别什么都往上贴

[CunningBoy]

<?xml version=\"1.0\"?>这个应该在最外层。

<?php
include_once ('admin_global.php');
header ( 'Content-Type:text/xml; charset=gbk' );
if ($_GET["users"]) {
	$login_sql = "select * from klm_users where user_grade=".$_GET['users'];
	echo $login_sql;
	$result = $db->query($login_sql);
	$header = "<?xml version=\"1.0\"?><root>";
	$end = "</root>";
	while ( $row = $db->fetch_array ($result)) {
		$xml.= "<row><value>" . $row ["user_grade"] . "</value><text>" . $row ["user_science"] . "</text></row>";
	}
	$xml = $header.$xml.$end;
	//echo $xml;
}
exit ();
?>

[床上等您]

有些东西只能出现一次的，乍么会放在 while 循环里了，呵呵

[funfun5433]

$head ='<?xml version="1.0" encoding="UTF-8" ?> <';
$head=$head.$sqlid;
$head=$head.' version="1.0" department="510100" DBSource="YJYBDB" tableSource="'.$sqlid.'" fieldSource="fieldSource"';
$head=$head.'>';

$funfun;
for($i=0;$i<$size;$i++)
{
    $fun='<item>';
    $tempArray=$result['root'][$i];
       
	foreach ($tempArray as $key => $value)
	{
	   if(!empty($value)){
	   $fun=$fun.'<'.$key.' DBSource="YJYBDB" tableSource="tableSource" fieldSource="fieldSource"'.'>'.$value.'</'.$key.'>';
	   }
	   else{
	   
	   continue;
	   }
	   
	   
	}

	$fun=$fun.'</item>';
	$funfun=$funfun.$fun;

}
//print_r($funfun);






$foot ='</';
$foot=$foot.$sqlid;
$foot=$foot.'>';

[kyzy_yy_pm]

    $xml.= "<?xml version=\"1.0\"?><row>";
    $header = "<root>";   
    $end = "</root>";
    while ( $row = $db->fetch_array ($result)) {
     $xml.= <value>" . $row ["user_grade"] . "</value><text>" . $row ["user_science"] . "</text></row>";
      }
    $xml = $header.$xml."</row>".$end;
    echo $xml;exit;//输出什么，或者是什么错误，打出来看看

[kyzy_yy_pm]

$xml.= "<?xml version=\"1.0\"?><row>";
$header = "<root>";
$end = "</root>";
while ( $row = $db->fetch_array ($result)) {
$xml.= <value>" . $row ["user_grade"] . "</value><text>" . $row ["user_science"] . "</text></row>";
}
$xml = $header.$xml."</row>".$end;
echo $xml;exit;//输出什么，或者是什么错误 ，打出来看看

[kyzy_yy_pm]

不好意思，弄错了，是这样
$xml.= "<?xml version=\"1.0\"?>";
$header = "<root>";
$end = "</root>";
while ( $row = $db->fetch_array ($result)) {
$xml.= "<row><value>" . $row ["user_grade"] . "</value><text>" . $row ["user_science"] . "</text></row>";
}
$xml = $header.$xml."</row>".$end;
echo $xml;exit;//输出什么，或者是什么错误，打出来看看