php错误: XML或文本声明不在实体源的开头

Question

每当我在PHP文件中使用以下代码时，它就会给我错误(错误: XML或文本声明不在实体源的开头)

<?xml version='1.0' encoding='utf-8'?>

我不知道解决方案是什么

请帮帮忙

提前感谢

<?xml version='1.0' encoding='utf-8'?><rows><page>1</page><records>15</records><total>1</total><row id='18'><cell>18</cell><cell>2011-9-13</cell><cell>AL</cell><cell>2011-10-19</cell><cell>2011-10-21</cell><cell>3</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell>mohan</cell><cell>Davinder Singh</cell></row><row id='17'><cell>17</cell><cell>2011-5-25</cell><cell>SL</cell><cell>2011-5-19</cell><cell>2011-5-19</cell><cell>1</cell><cell></cell><cell></cell><cell>Approved</cell><cell>Davinder</cell><cell>Kavita y</cell></row><row id='16'><cell>16</cell><cell>2011-5-25</cell><cell>SL</cell><cell>2011-5-24</cell><cell>2011-5-24</cell><cell>1</cell><cell></cell><cell></cell><cell>Approved</cell><cell></cell><cell>Kavita y</cell></row><row id='15'><cell>15</cell><cell>2011-5-26</cell><cell>AL</cell><cell>2011-7-08</cell><cell>2011-7-12</cell><cell>0</cell><cell></cell><cell></cell><cell>Disapproved</cell><cell></cell><cell>Kavita y</cell></row><row id='14'><cell>14</cell><cell>2011-5-25</cell><cell>AL</cell><cell>2011-6-30</cell><cell>2011-7-02</cell><cell>3</cell><cell></cell><cell></cell><cell>Approved</cell><cell></cell><cell>Kavita y</cell></row><row id='13'><cell>13</cell><cell>2011-9-14</cell><cell>CL</cell><cell>2011-6-15</cell><cell>2011-6-15</cell><cell>1</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell></cell><cell>Kavita y</cell></row><row id='12'><cell>12</cell><cell>2011-5-25</cell><cell>CL</cell><cell>2011-6-10</cell><cell>2011-6-12</cell><cell>3</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell></cell><cell>Kavita y</cell></row><row id='11'><cell>11</cell><cell>2011-5-25</cell><cell>SL</cell><cell>2011-5-20</cell><cell>2011-5-17</cell><cell>4</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell></cell><cell>Kavita y</cell></row><row id='10'><cell>10</cell><cell>2011-5-25</cell><cell>CL</cell><cell>2011-6-03</cell><cell>2011-6-05</cell><cell>3</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell>mohan</cell><cell>Davinder Singh</cell></row><row id='9'><cell>9</cell><cell>2011-5-26</cell><cell>SL</cell><cell>2011-5-18</cell><cell>2011-5-22</cell><cell>5</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell>mohan</cell><cell>Davinder Singh</cell></row><row id='8'><cell>8</cell><cell>2011-5-24</cell><cell>AL</cell><cell>2011-5-20</cell><cell>2011-5-20</cell><cell>0</cell><cell></cell><cell></cell><cell>Disapproved</cell><cell>mohan</cell><cell>Davinder Singh</cell></row><row id='7'><cell>7</cell><cell>2011-5-24</cell><cell>CL</cell><cell>2011-5-20</cell><cell>2011-5-20</cell><cell>1</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell>mohan</cell><cell>Davinder Singh</cell></row><row id='4'><cell>4</cell><cell>2011-9-14</cell><cell>SL</cell><cell>2011-5-20</cell><cell>2011-5-20</cell><cell>1</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell>mohan</cell><cell>Davinder Singh</cell></row><row id='3'><cell>3</cell><cell>2011-5-24</cell><cell>SL</cell><cell>2011-5-20</cell><cell>2011-5-20</cell><cell>1</cell><cell></cell><cell></cell><cell>Waiting for approval</cell><cell>mohan</cell><cell>Davinder Singh</cell></row><row id='1'><cell>1</cell><cell>2011-5-24</cell><cell>SL</cell><cell>2011-5-20</cell><cell>2011-5-22</cell><cell>0</cell><cell>dd</cell><cell>remarks</cell><cell>Disapproved</cell><cell>mohan</cell><cell>Davinder Singh</cell></row></rows>

和php代码

header("Content-type: text/xml;charset=utf-8");

$s = "<?xml version='1.0' encoding='utf-8'?>";
$s .=  "<rows>";
$s .= "<page>".$page."</page>";
$s .= "<records>".$count."</records>";

$s .= "<total>".$total_pages."</total>";


// be sure to put text data in CDATA
while($row = mysql_fetch_array($result,MYSQL_ASSOC)) {


    $s .= "<row id='". $row['fld_id']."'>";

    $s .= "<cell>". $row['fld_id']."</cell>";   
    $s .= "<cell><![CDATA[". getDepartmentName($row['deptSr'])."]]></cell>";
    $s .= "<cell>". $row['email']."</cell>";
    $s .= "<cell>". $row['fname']."</cell>";
    $s .= "<cell>". $row['lname']."</cell>";
    $s .= "<cell>". $row['password']."</cell>";

    $s .= "<cell>". listlevel($row['level'])."</cell>"; 
    $s .= "<cell>". date('Y-m-d G:i:s', $row['date_create'])."</cell>";
    $s .= "<cell>". date('Y-m-d G:i:s', $row['last_login'])."</cell>";  
    $s .= "<cell>". $row['ip_addr']."</cell>";
    $s .= "<cell>". $row['dob']."</cell>";  
    $s .= "<cell>". $row['street']."</cell>";       
    $s .= "<cell>". $row['phone_mob']."</cell>";        
    $s .= "<cell>". $row['phone_home']."</cell>";   
    $s .= "<cell>". liststatus($row['fld_enabled'])."</cell>";  

    $s .= "</row>";
}
$s .= "</rows>"; 

echo $s;

Answer 1

不在实体开始处的XML或文本声明表示prolog不是输出中的第一行。最有可能的是，一个空行以某种方式出现在您的输出中。这个错误并不是WordPress独有的；然而，正如我在评论中提到的，我在谷歌上搜索了一下错误消息，WordPress出现在很多结果中。如果您没有使用WordPress，请忽略本答案的其余部分。

免责声明：我对WordPress一无所知，所以我不愿以这个身份回答；然而，由于在撰写本文时还没有其他答案，我将简单地向您展示我在这个主题上找到的东西。

• Wordpress leading whitespace fix似乎可以帮助一些人解决specified.
• Additional suggestions are available here.
• How to fix: XML Parsing Error: XML or text declaration not at start of entity在前言中处理空格的错误。该评论建议使用ob_start()和ob_end_clean().

如果您使用的是WordPress，则可以通过在问题中添加WordPress标签来获得更好的答案。这不能保证，但它可以吸引比我更有见识的人的注意。