我有一个PHP页面，它从MySQL查询创建XML输出，当它返回一组记录时，它会很好地显示XML格式。
但是，当它返回多个记录集时，将删除XML格式。但是返回了两个请求的记录集。
我编辑数据库记录以触发要返回的一组或多组记录＆＃34; WHERE wp_hud_display.user_id = 1＆＃34;，每个记录在自己运行时，以XML显示，所以它不能成为数据库中一些奇怪的字符，导致XML格式被删除。
PHP页面
<?php
// create a dom document with encoding utf8
$domtree = new DOMDocument('1.0', 'UTF-8');
//database configuration
$config['mysql_host'] = "localhost";
$config['mysql_user'] = "root";
$config['mysql_pass'] = "";
$config['db_name'] = "tasmanhud";
//connect to host
mysql_connect($config['mysql_host'],$config['mysql_user'],$config['mysql_pass']);
//select database
@mysql_select_db($config['db_name']) or die( "Unable to select database");
//select all items in table
$sql = "SELECT
wp_hud_display.id,
wp_hud_display.name,
wp_hud_display.resolution,
wp_hud_display.user_id,
wp_hud_display.instrument_id_1,
wp_hud_display.x_loc_1,
wp_hud_display.y_loc_1,
wp_hud_display.layer_1,
wp_hud_display.instrument_id_2,
wp_hud_display.x_loc_2,
wp_hud_display.y_loc_2,
wp_hud_display.layer_2,
wp_hud_display.instrument_id_3,
wp_hud_display.x_loc_3,
wp_hud_display.y_loc_3,
wp_hud_display.layer_3,
wp_hud_display.instrument_id_4,
wp_hud_display.x_loc_4,
wp_hud_display.y_loc_4,
wp_hud_display.layer_4,
wp_hud_instrument.inst_id AS inst1_id,
wp_hud_instrument.name AS inst1_name,
wp_hud_instrument.image_file AS inst1_image,
wp_hud_instrument.font_type AS inst1_ft,
wp_hud_instrument.font_size AS inst1_fs,
wp_hud_instrument_1.inst_id AS inst2_id,
wp_hud_instrument_1.name AS inst2_name,
wp_hud_instrument_1.image_file AS inst2_image,
wp_hud_instrument_1.font_type AS inst2_ft,
wp_hud_instrument_1.font_size AS inst2_fs,
wp_hud_instrument_2.inst_id AS inst3_id,
wp_hud_instrument_2.name AS inst3_name,
wp_hud_instrument_2.image_file AS inst3_image,
wp_hud_instrument_2.font_type AS inst3_ft,
wp_hud_instrument_2.font_size AS inst3_fs,
wp_hud_instrument_3.inst_id AS inst4_id,
wp_hud_instrument_3.name AS inst4_name,
wp_hud_instrument_3.image_file AS inst4_image,
wp_hud_instrument_3.font_type AS inst4_ft,
wp_hud_instrument_3.font_size AS inst4_fs
FROM wp_hud_display
LEFT JOIN wp_hud_instrument
ON wp_hud_display.instrument_id_1 = wp_hud_instrument.inst_id
LEFT JOIN wp_hud_instrument wp_hud_instrument_1
ON wp_hud_display.instrument_id_2 = wp_hud_instrument_1.inst_id
LEFT JOIN wp_hud_instrument wp_hud_instrument_2
ON wp_hud_display.instrument_id_3 = wp_hud_instrument_2.inst_id
LEFT JOIN wp_hud_instrument wp_hud_instrument_3
ON wp_hud_display.instrument_id_4 = wp_hud_instrument_3.inst_id
WHERE wp_hud_display.user_id = 1
GROUP BY wp_hud_display.id";
/* create the root element of the xml tree */
$xmlRoot = $domtree->createElement("wp_hud_displays");
/* append it to the document created */
$xmlRoot = $domtree->appendChild($xmlRoot);
$hud_display_group = $domtree->createElement("hud_display_group");
$hud_display_group = $xmlRoot->appendChild($hud_display_group);
$result = mysql_query($sql);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
if(mysql_num_rows($result)>0)
{
while($result_array = mysql_fetch_assoc($result))
{
$hud_display = $domtree->createElement("hud_display");
$hud_display = $hud_display_group->appendChild($hud_display);
$instrument_id_1 = $domtree->createElement("instrument_id_1");
$instrument_id_1 = $hud_display->appendChild($instrument_id_1);
$instrument_id_2 = $domtree->createElement("instrument_id_2");
$instrument_id_2 = $hud_display->appendChild($instrument_id_2);
$instrument_id_3 = $domtree->createElement("instrument_id_3");
$instrument_id_3 = $hud_display->appendChild($instrument_id_3);
$instrument_id_4 = $domtree->createElement("instrument_id_4");
$instrument_id_4 = $hud_display->appendChild($instrument_id_4);
/* you should enclose the following two lines in a cicle */
$hud_display->appendChild($domtree->createElement('id',$result_array['id']));
$hud_display->appendChild($domtree->createElement('name',$result_array['name']));
$hud_display->appendChild($domtree->createElement('resolution',$result_array['resolution']));
$hud_display->appendChild($domtree->createElement('user_id',$result_array['user_id']));
// Instrument 1
$hud_display->appendChild($domtree->createElement('instrument_id_1',$result_array['instrument_id_1']));
$instrument_id_1->appendChild($domtree->createElement('inst_id',$result_array['inst1_id']));
$instrument_id_1->appendChild($domtree->createElement('name',$result_array['inst1_name']));
$instrument_id_1->appendChild($domtree->createElement('image_name',$result_array['inst1_image']));
$instrument_id_1->appendChild($domtree->createElement('font_type',$result_array['inst1_ft']));
$instrument_id_1->appendChild($domtree->createElement('font_size',$result_array['inst1_fs']));
$hud_display->appendChild($domtree->createElement('x_loc_1',$result_array['x_loc_1']));
$hud_display->appendChild($domtree->createElement('y_loc_1',$result_array['y_loc_1']));
$hud_display->appendChild($domtree->createElement('layer_1',$result_array['layer_1']));
// Instrument 2
$hud_display->appendChild($domtree->createElement('instrument_id_2',$result_array['instrument_id_2']));
$instrument_id_2->appendChild($domtree->createElement('inst_id',$result_array['inst2_id']));
$instrument_id_2->appendChild($domtree->createElement('name',$result_array['inst2_name']));
$instrument_id_2->appendChild($domtree->createElement('image_name',$result_array['inst2_image']));
$instrument_id_2->appendChild($domtree->createElement('font_type',$result_array['inst2_ft']));
$instrument_id_2->appendChild($domtree->createElement('font_size',$result_array['inst2_fs']));
$hud_display->appendChild($domtree->createElement('x_loc_2',$result_array['x_loc_2']));
$hud_display->appendChild($domtree->createElement('y_loc_2',$result_array['y_loc_2']));
$hud_display->appendChild($domtree->createElement('layer_2',$result_array['layer_2']));
// Instrument 3
$hud_display->appendChild($domtree->createElement('instrument_id_3',$result_array['instrument_id_3']));
$instrument_id_3->appendChild($domtree->createElement('inst_id',$result_array['inst3_id'])); $instrument_id_3->appendChild($domtree->createElement('name',$result_array['inst3_name']));
$instrument_id_3->appendChild($domtree->createElement('image_name',$result_array['inst3_image']));
$instrument_id_3->appendChild($domtree->createElement('font_type',$result_array['inst3_ft'])); $instrument_id_3->appendChild($domtree->createElement('font_size',$result_array['inst3_fs']));
$hud_display->appendChild($domtree->createElement('x_loc_3',$result_array['x_loc_3']));
$hud_display->appendChild($domtree->createElement('y_loc_3',$result_array['y_loc_3']));
$hud_display->appendChild($domtree->createElement('layer_3',$result_array['layer_3']));
// Instrument 4
$hud_display->appendChild($domtree->createElement('instrument_id_4',$result_array['instrument_id_4']));
$instrument_id_4->appendChild($domtree->createElement('inst_id',$result_array['inst4_id']));
$instrument_id_4->appendChild($domtree->createElement('name',$result_array['inst4_name']));
$instrument_id_4->appendChild($domtree->createElement('image_name',$result_array['inst4_image']));
$instrument_id_4->appendChild($domtree->createElement('font_type',$result_array['inst4_ft']));
$instrument_id_4->appendChild($domtree->createElement('font_size',$result_array['inst4_fs'])); $hud_display->appendChild($domtree->createElement('x_loc_4',$result_array['x_loc_4']));
$hud_display->appendChild($domtree->createElement('y_loc_4',$result_array['y_loc_4']));
$hud_display->appendChild($domtree->createElement('layer_4',$result_array['layer_4']));
}
}
// get the xml printed
echo $domtree->saveXML();
//send the xml header to the browser
header ("Content-Type:text/xml");
?>
一个记录XML输出
<wp_hud_displays>
<hud_display_group>
<hud_display>
<instrument_id_1></instrument_id_1>
<instrument_id_2></instrument_id_2>
<instrument_id_3></instrument_id_3>
<instrument_id_4></instrument_id_4>
<id>1</id>
<name>test display</name>
<resolution>1080p</resolution>
<user_id>1</user_id>
<instrument_id_1>1</instrument_id_1>
<x_loc_1>89</x_loc_1>
<y_loc_1>79</y_loc_1>
<layer_1>1</layer_1>
<instrument_id_2>2</instrument_id_2>
<x_loc_2>988</x_loc_2>
<y_loc_2>98</y_loc_2>
<layer_2>1</layer_2>
<instrument_id_3>3</instrument_id_3>
<x_loc_3>89</x_loc_3>
<y_loc_3>90</y_loc_3>
<layer_3>1</layer_3>
<instrument_id_4>4</instrument_id_4>
<x_loc_4>67</x_loc_4>
<y_loc_4>76</y_loc_4>
<layer_4>1</layer_4>
</hud_display>
</hud_display_group>
</wp_hud_displays>
多个记录输出
1test1_gauge001-2_zpsdbe86ca1f.jpg11PID_DISTANCE30100002500101223dfd34412sdf34534056Arail122test1_needle11PID_ENGINE_LOAD211000025200160112025000000002test1_needle11PID_ENGINE_LOAD211000025200160112025000000003new gaugedfsgsdfgfd435430PID_COOLANT_TEMP2434534541023324000000003new gaugedfsgsdfgfd435430PID_COOLANT_TEMP2434534541023324000000004Bla100.jpg2702334395910299000000004Bla100.jpg2702334395910299000000002test1_needle11PID_ENGINE_LOAD211000025200160112025000000001test display1080p118979129889813899014677612dsfdsfsd720p12321342323213224232123143423444342
这可能与WHILE循环有关吗？无法创建另一组＆＃34; wp_hud_display.id＆＃34;记录
答案 0 :(得分：0)
非常奇怪的结果是剥离XML标记并在第一个之后只留下记录上的值。可能是因为Wordpress可能不再支持已弃用的mysql()函数。
考虑在连接上使用MySQL PDO和try / catch，迭代STH对象。我还为您添加了一个文档输出，以查看屏幕和文件之间的内容是否不同
此外，您可以利用for loop个元素，因为标记名称仅由1-4个仪器指示符更改：
<?php
// create a dom document with encoding utf8
$domtree = new DOMDocument('1.0', 'UTF-8');
//database configuration
$config['mysql_host'] = "localhost";
$config['mysql_user'] = "root";
$config['mysql_pass'] = "";
$config['db_name'] = "tasmanhud";
//connect to host
try {
$dbh = new PDO("mysql:host=$config['mysql_host'];dbname=$config['db_name']",$config['mysql_user'],$config['mysql_pass']);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
//select all items in table
$sql = "SELECT
wp_hud_display.id,
wp_hud_display.name,
wp_hud_display.resolution,
wp_hud_display.user_id,
wp_hud_display.instrument_id_1,
wp_hud_display.x_loc_1,
wp_hud_display.y_loc_1,
wp_hud_display.layer_1,
wp_hud_display.instrument_id_2,
wp_hud_display.x_loc_2,
wp_hud_display.y_loc_2,
wp_hud_display.layer_2,
wp_hud_display.instrument_id_3,
wp_hud_display.x_loc_3,
wp_hud_display.y_loc_3,
wp_hud_display.layer_3,
wp_hud_display.instrument_id_4,
wp_hud_display.x_loc_4,
wp_hud_display.y_loc_4,
wp_hud_display.layer_4,
wp_hud_instrument.inst_id AS inst1_id,
wp_hud_instrument.name AS inst1_name,
wp_hud_instrument.image_file AS inst1_image,
wp_hud_instrument.font_type AS inst1_ft,
wp_hud_instrument.font_size AS inst1_fs,
wp_hud_instrument_1.inst_id AS inst2_id,
wp_hud_instrument_1.name AS inst2_name,
wp_hud_instrument_1.image_file AS inst2_image,
wp_hud_instrument_1.font_type AS inst2_ft,
wp_hud_instrument_1.font_size AS inst2_fs,
wp_hud_instrument_2.inst_id AS inst3_id,
wp_hud_instrument_2.name AS inst3_name,
wp_hud_instrument_2.image_file AS inst3_image,
wp_hud_instrument_2.font_type AS inst3_ft,
wp_hud_instrument_2.font_size AS inst3_fs,
wp_hud_instrument_3.inst_id AS inst4_id,
wp_hud_instrument_3.name AS inst4_name,
wp_hud_instrument_3.image_file AS inst4_image,
wp_hud_instrument_3.font_type AS inst4_ft,
wp_hud_instrument_3.font_size AS inst4_fs
FROM wp_hud_display
LEFT JOIN wp_hud_instrument
ON wp_hud_display.instrument_id_1 = wp_hud_instrument.inst_id
LEFT JOIN wp_hud_instrument wp_hud_instrument_1
ON wp_hud_display.instrument_id_2 = wp_hud_instrument_1.inst_id
LEFT JOIN wp_hud_instrument wp_hud_instrument_2
ON wp_hud_display.instrument_id_3 = wp_hud_instrument_2.inst_id
LEFT JOIN wp_hud_instrument wp_hud_instrument_3
ON wp_hud_display.instrument_id_4 = wp_hud_instrument_3.inst_id
WHERE wp_hud_display.user_id = 1
GROUP BY wp_hud_display.id";
$STH = $dbh->query($sql);
$STH->setFetchMode(PDO::FETCH_ASSOC);
}
catch(PDOException $e) {
echo $e->getMessage();
}
/* create the root element of the xml tree */
$xmlRoot = $domtree->createElement("wp_hud_displays");
/* append it to the document created */
$xmlRoot = $domtree->appendChild($xmlRoot);
$hud_display_group = $domtree->createElement("hud_display_group");
$hud_display_group = $xmlRoot->appendChild($hud_display_group);
while($row = $STH->fetch()) {
$hud_display = $domtree->createElement("hud_display");
$hud_display = $hud_display_group->appendChild($hud_display);
$instrument_id_1 = $domtree->createElement("instrument_id_1");
$instrument_id_1 = $hud_display->appendChild($instrument_id_1);
$instrument_id_2 = $domtree->createElement("instrument_id_2");
$instrument_id_2 = $hud_display->appendChild($instrument_id_2);
$instrument_id_3 = $domtree->createElement("instrument_id_3");
$instrument_id_3 = $hud_display->appendChild($instrument_id_3);
$instrument_id_4 = $domtree->createElement("instrument_id_4");
$instrument_id_4 = $hud_display->appendChild($instrument_id_4);
/* you should enclose the following two lines in a cicle */
$id = $domtree->createElement('id',$row['id']);
$hud_display->appendChild($id);
$name = $domtree->createElement('name',$row['name']);
$hud_display->appendChild($name);
$resolution = $domtree->createElement('resolution',$row['resolution']);
$hud_display->appendChild($resolution);
$user_id = $domtree->createElement('user_id',$row['user_id']);
$hud_display->appendChild($user_id);
// Instruments 1 - 4
for($i = 1; $i <= 4; $i++) {
${'instrument_id_'.$i} = $domtree->createElement('instrument_id_'.$i,$row['instrument_id_'.$i]);
$hud_display->appendChild(${'instrument_id_'.$i});
${'inst'.$i.'_id'} = $domtree->createElement('inst_id',$row['inst'.$i.'_id']);
${'instrument_id_'.$i}->appendChild(${'inst'.$i.'_id');
${'inst'.$i.'_name'} = $domtree->createElement('name',$row['inst'.$i.'_name']);
${'instrument_id_'.$i}->appendChild(${'inst'.$i.'_name'});
${'inst'.$i.'_image'} = $domtree->createElement('image_name',$row['inst'.$i.'_image']);
${'instrument_id_'.$i}->appendChild(${'inst'.$i.'_image'});
${'inst'.$i.'_ft'} = $domtree->createElement('font_type',$row['inst'.$i.'_ft']);
${'instrument_id_'.$i}->appendChild(${'inst'.$i.'_ft'});
${'inst'.$i.'_fs'} = $domtree->createElement('font_size',$row['inst'.$i.'_fs']);
${'instrument_id_'.$i}->appendChild(${'inst'.$i.'_fs'});
${'x_loc_'.$i} = $domtree->createElement('x_loc_'.$i,$row['x_loc_'.$i]);
$hud_display->appendChild(${'x_loc_'.$i});
${'y_loc_'.$i} = $domtree->createElement('y_loc_'.$i,$row['y_loc_'.$i]);
$hud_display->appendChild(${'y_loc_'.$i});
${'layer_'.$i} = $domtree->createElement('layer_'.$i,$row['layer_'.$i]);
$hud_display->appendChild(${'layer_'.$i});
}
}
// get the xml printed
echo $domtree->saveXML();
// saving xml to document
file_put_contents("XML_WP_Output.xml", $domtree->saveXML());
//send the xml header to the browser
header ("Content-Type:text/xml");
// closing db connection
$dbh = null;
?>
答案 1 :(得分：0)
我已经发现为什么Firefox在返回查询时遇到XML格式问题。
原来Firefox有4K XML节点限制 Firefox 4K XML Node Limit
在IE中测试我的查询时，它运行正常，在Firefox中加载输出.xml文件后查询也没问题。
这将教我不使用不同的浏览器进行测试！
感谢您帮助解决此问题的人，我现在对XML有了更多的了解。