嗨，伙计们，我对php和xml有点陌生，所以请耐心等待。
我想知道如何在不使用PHP覆盖现有数据的情况下将xml数据附加到xml文件中。
我这里有代码：
writexml.php
<?php
$employees = array();
$employees [] = array(
'name' => 'Tom',
'age' => '34',
'salary' => "$10000"
);
$employees [] = array(
'name' => 'Ryan',
'age' => '20',
'salary' => "$2000"
);
$employees [] = array(
'name' => 'Dave',
'age' => '20',
'salary' => "$2000"
);
$doc = new DOMDocument();
$doc->formatOutput = true;
$r = $doc->createElement( "employees" );
$doc->appendChild( $r );
foreach( $employees as $employee )
{
$b = $doc->createElement( "employee" );
$name = $doc->createElement( "name" );
$name->appendChild(
$doc->createTextNode( $employee['name'] )
);
$b->appendChild( $name );
$age = $doc->createElement( "age" );
$age->appendChild(
$doc->createTextNode( $employee['age'] )
);
$b->appendChild( $age );
$salary = $doc->createElement( "salary" );
$salary->appendChild(
$doc->createTextNode( $employee['salary'] )
);
$b->appendChild( $salary );
$r->appendChild( $b );
}
echo $doc->saveXML();
$doc->save("employees.xml")
?>
当我运行此代码时，它会删除所有以前的数据。请帮忙。
您将需要打开现有文档来向其附加信息，您的最后一次保存只会覆盖现有文件。
$doc = new DomDocument();
$doc->loadXML(file_get_contents('employees.xml'));
foreach($doc->getElementsByTagName('employees') as $node)
{
// your current xml logic here
}
更新hafedh
$doc = new DomDocument();
$doc->formatOutput = true;
if($xml = file_get_contents('employees.xml'))
$doc->loadXML($xml);
$nodelist = $doc->getElementsByTagName('employees');
if($nodelist->length === 0)
{
$nodelist = $doc->createElement("employees");
$doc->appendChild($nodelist);
$nodelist = $doc->getElementsByTagName('employees');
}
foreach($nodelist as $key => $node)
{
// Employee Container
$element = $doc->createElement("employee");
$employee = $node->appendChild($element);
// Name Element
$element = $doc->createElement("name");
$name = $employee->appendChild($element);
$element = $doc->createTextNode('CCC');
$name->appendChild($element);
// Age Element
$element = $doc->createElement("age");
$age = $employee->appendChild($element);
$element = $doc->createTextNode('333');
$age->appendChild($element);
}
echo '<pre>' . htmlentities($doc->saveXML());
xml文件内容
<employees><employee><name>AAA</name><age>111</age></employee><employee><name>BBB</name><age>222</age></employee></employees>