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我正在尝试删除 XML 结构中的特定节点。我希望能够删除包含我从表单字段中指定的特定用户名的 Employee 元素的所有子元素以及与之相关的所有子元素。我一直在使用 SimpleXML 加载所有数据，但我可以通过另一种方法重新加载数据。我想知道删除所有子元素的最佳方法是什么，无论元素的深度有多少。到目前为止，我遇到的所有解决方案都只有一个层次。我想删除用户名的用户UserToDelete。结构的一个例子如下。

<Employees>
  <Employee Status="Part-time">
     <First_Name>...</First_Name>
     <Last_Name>...</Last_Name>
     <Position>...</Position>
     <SSN>...</SSN>
     <Contact_Info>
         <Office_Phone>...</Office_Phone>
         <Email>...</Email>
         <Cell_Phone>...</Cell_Phone>
     </Contact_Info>
     <Access_Info level="admin">
         <Username>UserToDelete</Username>
         <Password>...</Password>
     </Access_Info>
     <Department>...</Department>
     <Date_Started>...</Date_Started>
     <Salary>...</Salary>
     <Years>5</Years>
     <Photo>...</Photo>
  </Employee>
  <Employee>  
     ....
  </Employee>
  ...
</Employees>

因此，问题的关键是如何使用 PHP 删除整个 Employee，包括所有子项，包括contact_infoand中的元素access_info。节点的深度是否重要，或者我可以执行以下操作吗？

foreach ($xml->Employee as $employee) {
    if($username == $employee->Access_Info->Username) {
        foreach ($family as $node) {
            $node->parentNode->removeChild($node);
        }
        echo $dom->saveXML('employees.xml');
        echo "<font color='red'>".$username." deleted. </font>";
    }

}

编辑：

我没有在echo "<font color='red'>".$username." deleted. </font>";.

4

1 回答 1

1

所以就问题而言，如何删除整个员工

xml.xml：

<?xml version="1.0"?>
<Employees>

<Employee>
  <Username>Joe</Username>
  <Password>...</Password>
</Employee>


<Employee>
    <Access_Info level="admin">
      <Username>Jane</Username>
      <Password>...</Password>
    </Access_Info>
</Employee>


<Employee Status="Part-time">
     <First_Name>...</First_Name>
     <Last_Name>...</Last_Name>
     <Position>...</Position>
     <SSN>...</SSN>
     <Contact_Info>
         <Office_Phone>...</Office_Phone>
         <Email>...</Email>
         <Cell_Phone>...</Cell_Phone>
     </Contact_Info>
     <Access_Info level="admin">
       <NestedOneMoreTime>
         <Username>EmployeeToDelete</Username>
         <Password>...</Password>
       </NestedOneMoreTime>
     </Access_Info>
     <Department>...</Department>
     <Date_Started>...</Date_Started>
     <Salary>...</Salary>
     <Years>5</Years>
     <Photo>...</Photo>
</Employee>

</Employees>

php:

$xml = simplexml_load_file("xml.xml");

foreach ($xml->Employee as $employee)
{
    //Because the needed xpath feature is broken in SimpleXML, create
    //a new xml document containing only the current Employee:
    $employee_xml = simplexml_load_string($employee->asXML()); 

    //Get all Username elements in employee_xml(there
    //should only be one, which will be at position 0 in the returned array):
    $usernames_array = $employee_xml->xpath("//Username");

    if($usernames_array[0] == "UserToDelete")
    {
        unset($employee[0]); //The first element of an Element object
                             //is a reference to its DOM location
        break; //Important--you don't want to keep iterating over something
               //from which you've deleted elements.  If you need to delete
               //more than one element, save the references in an array
               //and unset() them after this loop has terminated.
    }
}

echo $xml->asXML();
于 2013-04-22T07:11:10.760 回答