Question

我将一个字符串保存到数据库中然后我在php文件中以xml格式检索该数据，并从另一个php调用该xml数据文件。它适用于存储在数据库中的简单文本记录，但是当我保存这样的字符串时我替换＆lt;到＆amp; lt和＆gt; ＆amp; gt然后保存到数据库

 if x<y and y>z

并在php文件中检索它输出是一个xml结构 e.g

<questions><question><question_id>2</question_id>
<question>what is matrix</question><weight>6</weight>
<subject_code>4</subject_code></question>

<question><question_id>3</question_id><question>squareroot 3 is</question><weight>3</weight><subject_code>4</subject_code></question>

<question><question_id>15</question_id><question>what is a set</question><weight>4</weight><subject_code>4</subject_code></question><question><question_id>16</question_id>

<question>If x < y, y < z then</question><weight>4</weight><subject_code>4</subject_code></question></questions>

它显示我＆amp; lt而不是'＆lt;'在最后一个问题中（如果x＆amp; lty和y＆amp; ltz）
但是当我从另一个php文件中调用它时，它会给出错误

Warning: simplexml_load_string(): Entity: line 1: parser error : EntityRef: expecting ';' in /var/www/test/view/addTestQuestion.php
 on line 54 Call Stack: 0.0007 332148 1. {main}() /var/www/test/view/addTestQuestion.php:0 0.0222 333892 2. simplexml_load_string()
 /var/www/test/view/addTestQuestion.php:54 Warning: simplexml_load_string(): ubject_code>16If x /var/www/test/view/addTestQuestion.php:0 0.0222 333892 2. simplexml_load_string()
 /var/www/test/view/addTestQuestion.php:54 Warning: simplexml_load_string(): ^ 
in /var/www/test/view/addTestQuestion.php on line 54 Call Stack: 0.0007 332148 1. {main}() /var/www/test/view/addTestQuestion.php:0 0.0222 333892 2. simplexml_load_string() /var/www/test/view/addTestQuestion.php:54 Warning: simplexml_load_string(): Entity: line 1: parser error : EntityRef: expecting ';' in
 /var/www/test/view/addTestQuestion.php on line 54 Call Stack: 0.0007 332148 1. {main}() /var/www/test/view/addTestQuestion.php:0 0.0222 333892 2. simplexml_load_string() /var/www/test/view/addTestQuestion.php:54 Warning: simplexml_load_string(): de>16If x  line 54 Call Stack: 0.0007 332148 1. {main}() /var/www/test/view/addTestQuestion.php:0 0.0222 333892 2. simplexml_load_string() /var/www/test/view/addTestQuestion.php:54 Warning: simplexml_load_string(): ^ in
 /var/www/test/view/addTestQuestion.php on line 54 Call Stack: 0.0007 332148 1. {main}() /var/www/test/view/addTestQuestion.php:0 0.0222 333892 2. simplexml_load_string() 
/var/www/test/view/addTestQuestion.php:54 Notice: Trying to get property of non-object in /var/www/test/view/addTestQuestion.php on line 56 Call Stack: 0.0007 332148 1. {main}
() /var/www/test/view/addTestQuestion.php:0 Warning: Invalid argument supplied for 
foreach() in /var/www/test/view/addTestQuestion.php on line 56 Call Stack: 0.0007 332148 1. {main}() /var/www/test/view/addTestQuestion.php:0

任何帮助将不胜感激

Answer 1

引用以&开头，以;结尾。你在任何地方都没有;。

Answer 2

您不能将<或>字符用作XML中的文字字符，请使用实体：

<question>If &lt; y, y &gt; z</question>

检索到该文本字符串后，您可以使用html_entity_decode函数将其解码为真实的XML字符串。

我该如何解决这个XML错误

2 个答案: