如何将数组转换为PHP中的SimpleXML对象?
当前回答
<?php
function array_to_xml(array $arr, SimpleXMLElement $xml)
{
foreach ($arr as $k => $v) {
is_array($v)
? array_to_xml($v, $xml->addChild($k))
: $xml->addChild($k, $v);
}
return $xml;
}
$test_array = array (
'bla' => 'blub',
'foo' => 'bar',
'another_array' => array (
'stack' => 'overflow',
),
);
echo array_to_xml($test_array, new SimpleXMLElement('<root/>'))->asXML();
其他回答
我想要一个代码，将一个数组内的所有元素，并把它们作为属性，所有数组作为子元素。
对于像这样的东西
array (
'row1' => array ('head_element' =>array("prop1"=>"some value","prop2"=>array("empty"))),
"row2"=> array ("stack"=>"overflow","overflow"=>"overflow")
);
我会得到这样的结果
<?xml version="1.0" encoding="utf-8"?>
<someRoot>
<row1>
<head_element prop1="some value">
<prop2 0="empty"/>
</head_element>
</row1>
<row2 stack="overflow" overflow="stack"/>
</someRoot>
要实现这一点，代码如下，但要非常小心，它是递归的，实际上可能会导致stackoverflow:)
function addElements(&$xml,$array)
{
$params=array();
foreach($array as $k=>$v)
{
if(is_array($v))
addElements($xml->addChild($k), $v);
else $xml->addAttribute($k,$v);
}
}
function xml_encode($array)
{
if(!is_array($array))
trigger_error("Type missmatch xml_encode",E_USER_ERROR);
$xml=new SimpleXMLElement('<?xml version=\'1.0\' encoding=\'utf-8\'?><'.key($array).'/>');
addElements($xml,$array[key($array)]);
return $xml->asXML();
}
您可能希望添加数组长度检查，以便在数据部分中设置某些元素，而不是作为属性。
一个简短的例子:
<?php
$test_array = array (
'bla' => 'blub',
'foo' => 'bar',
'another_array' => array (
'stack' => 'overflow',
),
);
$xml = new SimpleXMLElement('<root/>');
array_walk_recursive($test_array, array ($xml, 'addChild'));
print $xml->asXML();
结果
<?xml version="1.0"?>
<root>
<blub>bla</blub>
<bar>foo</bar>
<overflow>stack</overflow>
</root>
键和值会被交换——你可以在array_walk之前用array_flip()来修复这个问题。array_walk_recursive需要PHP 5。你可以用array_walk代替，但你不会得到'stack' => 'overflow'在XML中。
基于这里的所有其他内容，通过前缀@处理数值索引+属性，并可以将xml注入到现有节点:
Code
function simple_xmlify($arr, SimpleXMLElement $root = null, $el = 'x') {
// based on, among others http://stackoverflow.com/a/1397164/1037948
if(!isset($root) || null == $root) $root = new SimpleXMLElement('<' . $el . '/>');
if(is_array($arr)) {
foreach($arr as $k => $v) {
// special: attributes
if(is_string($k) && $k[0] == '@') $root->addAttribute(substr($k, 1),$v);
// normal: append
else simple_xmlify($v, $root->addChild(
// fix 'invalid xml name' by prefixing numeric keys
is_numeric($k) ? 'n' . $k : $k)
);
}
} else {
$root[0] = $arr;
}
return $root;
}//-- fn simple_xmlify
使用
// lazy declaration via "queryparam"
$args = 'hello=4&var[]=first&var[]=second&foo=1234&var[5]=fifth&var[sub][]=sub1&var[sub][]=sub2&var[sub][]=sub3&var[@name]=the-name&var[@attr2]=something-else&var[sub][@x]=4.356&var[sub][@y]=-9.2252';
$q = array();
parse_str($val, $q);
$xml = simple_xmlify($q); // dump $xml, or...
$result = get_formatted_xml($xml); // see below
结果
<?xml version="1.0"?>
<x>
<hello>4</hello>
<var name="the-name" attr2="something-else">
<n0>first</n0>
<n1>second</n1>
<n5>fifth</n5>
<sub x="4.356" y="-9.2252">
<n0>sub1</n0>
<n1>sub2</n1>
<n2>sub3</n2>
</sub>
</var>
<foo>1234</foo>
</x>
好处:格式化XML
function get_formatted_xml(SimpleXMLElement $xml, $domver = null, $preserveWhitespace = true, $formatOutput = true) {
// http://stackoverflow.com/questions/1191167/format-output-of-simplexml-asxml
// create new wrapper, so we can get formatting options
$dom = new DOMDocument($domver);
$dom->preserveWhiteSpace = $preserveWhitespace;
$dom->formatOutput = $formatOutput;
// now import the xml (converted to dom format)
/*
$ix = dom_import_simplexml($xml);
$ix = $dom->importNode($ix, true);
$dom->appendChild($ix);
*/
$dom->loadXML($xml->asXML());
// print
return $dom->saveXML();
}//-- fn get_formatted_xml
总之……我使用了onokazu的代码(谢谢!)，并添加了在XML中重复标记的能力，它还支持属性，希望有人发现它有用!
<?php
function array_to_xml(array $arr, SimpleXMLElement $xml) {
foreach ($arr as $k => $v) {
$attrArr = array();
$kArray = explode(' ',$k);
$tag = array_shift($kArray);
if (count($kArray) > 0) {
foreach($kArray as $attrValue) {
$attrArr[] = explode('=',$attrValue);
}
}
if (is_array($v)) {
if (is_numeric($k)) {
array_to_xml($v, $xml);
} else {
$child = $xml->addChild($tag);
if (isset($attrArr)) {
foreach($attrArr as $attrArrV) {
$child->addAttribute($attrArrV[0],$attrArrV[1]);
}
}
array_to_xml($v, $child);
}
} else {
$child = $xml->addChild($tag, $v);
if (isset($attrArr)) {
foreach($attrArr as $attrArrV) {
$child->addAttribute($attrArrV[0],$attrArrV[1]);
}
}
}
}
return $xml;
}
$test_array = array (
'bla' => 'blub',
'foo' => 'bar',
'another_array' => array (
array('stack' => 'overflow'),
array('stack' => 'overflow'),
array('stack' => 'overflow'),
),
'foo attribute1=value1 attribute2=value2' => 'bar',
);
$xml = array_to_xml($test_array, new SimpleXMLElement('<root/>'))->asXML();
echo "$xml\n";
$dom = new DOMDocument;
$dom->preserveWhiteSpace = FALSE;
$dom->loadXML($xml);
$dom->formatOutput = TRUE;
echo $dom->saveXml();
?>
这里有一个函数帮我解决了这个问题:
就像这样叫它
echo arrayToXml("response",$arrayIWantToConvert);
function arrayToXml($thisNodeName,$input){
if(is_numeric($thisNodeName))
throw new Exception("cannot parse into xml. remainder :".print_r($input,true));
if(!(is_array($input) || is_object($input))){
return "<$thisNodeName>$input</$thisNodeName>";
}
else{
$newNode="<$thisNodeName>";
foreach($input as $key=>$value){
if(is_numeric($key))
$key=substr($thisNodeName,0,strlen($thisNodeName)-1);
$newNode.=arrayToXml3($key,$value);
}
$newNode.="</$thisNodeName>";
return $newNode;
}
}
