我正在使用此类将数组移植到XML:
class ArrayToXML
{
/**
* The main function for converting to an XML document.
* Pass in a multi dimensional array and this recrusively loops through and builds up an XML document.
*
* @param array $data
* @param string $rootNodeName - what you want the root node to be - defaultsto data.
* @param SimpleXMLElement $xml - should only be used recursively
* @return string XML
*/
public static function toXml($data, $rootNodeName = 'data', &$xml=null)
{
// turn off compatibility mode as simple xml throws a wobbly if you don't.
if (ini_get('zend.ze1_compatibility_mode') == 1)
{
ini_set ('zend.ze1_compatibility_mode', 0);
}
if (is_null($xml))
{
$xml = simplexml_load_string("");
}
// loop through the data passed in.
foreach($data as $key => $value)
{
// if numeric key, assume array of rootNodeName elements
if (is_numeric($key))
{
$key = $rootNodeName;
}
// delete any char not allowed in XML element names
$key = preg_replace('/[^a-z0-9\-\_\.\:]/i', '', $key);
// if there is another array found recrusively call this function
if (is_array($value))
{
// create a new node unless this is an array of elements
$node = ArrayToXML::isAssoc($value) ? $xml->addChild($key) : $xml;
// recrusive call - pass $key as the new rootNodeName
ArrayToXML::toXml($value, $key, $node);
}
else
{
// add single node.
$value = htmlentities($value);
$xml->addChild($key,$value);
}
}
// pass back as string. or simple xml object if you want!
return $xml->asXML();
}
// determine if a variable is an associative array
public static function isAssoc( $array ) {
return (is_array($array) && 0 !== count(array_diff_key($array, array_keys(array_keys($array)))));
}
}
我正在使用此代码示例调用此函数只是为了测试一下:
require_once('test_xml.php');
$library = array(
'book' => array(
array(
'authorFirst' => 'Mark',
'authorLast' => 'Twain',
'title' => 'The Innocents Abroad'
),
array(
'authorFirst' => 'Charles',
'authorLast' => 'Dickens',
'title' => 'Oliver Twist'
)
)
);
$ArrayToXml=new ArrayToXml();
$ArrayToXml->toXml($library)
我收到此错误:致命错误:在第42行的非对象上调用成员函数addChild()。
知道出了什么问题吗? 谢谢。
编辑: 第42行:$ node = ArrayToXML :: isAssoc($ value)? $ xml-> addChild($ key):$ xml;
EDIT2:
尊重所有人,这段代码还没有完成。答案是正确的,但我只得到MarkTwainCharlesDickens
作为输出。我应该得到正确形成的XML。我应该启用一些扩展吗?但我已经看到simplexml已启用。
感谢任何帮助。
答案 0 :(得分:2)
您无法使用空字符串创建XML文档。
var_dump(simplexml_load_string(""));
bool(false)
VS
var_dump(simplexml_load_string("<root/>"));
object(SimpleXMLElement)#1 (0) {}
从book
获取$data
值:
$root = key($data);
$rootNode = "<{$root}/>";