Php 通过XML儿童解析
我有以下xml:Php 通过XML儿童解析,php,xml,xml-parsing,Php,Xml,Xml Parsing,我有以下xml: <?xml version="1.0" standalone="yes"?> <Products> <Product> <name>Milk</name> <price>1.4</price> <productinfos> <category1 value="somecategory1"/> <category2 value="someca
<?xml version="1.0" standalone="yes"?>
<Products>
<Product>
<name>Milk</name>
<price>1.4</price>
<productinfos>
<category1 value="somecategory1"/>
<category2 value="somecategory2"/>
<category3 value="somecategory3"/>
</productinfos>
</Product>
</Products>
因为有时我解析的xml看起来不同:
<?xml version="1.0" standalone="yes"?>
<Products>
<Product>
<name>Milk</name>
<price>1.4</price>
<productinfos>
<category1 value=""/>
<category3 value="somecategory"/>
</productinfos>
</Product>
</Products>
牛奶
1.4
在上面的示例中,如何检查category2是否存在?
谢谢你的努力 您正在寻找
simplexmlement::children()
方法
$xml=新的SimpleXMLElement(true,
“category2'=>正确,
“类别3”=>正确,
);
//遍历的子标记
foreach($product->productinfos->children()作为$productinfo){
//使用getName()方法访问元素名,然后
//XML属性可以像数组一样访问
if(isset($missing_tags[$productinfo->getName()]))&&
!空($productinfo['value'])){
$missing_标记[$productinfo->getName()]=false;
echo$productinfo->getName()。“:”$productinfo['value']。“\n”;
}
}
//带有一个参数的数组_过滤器会过滤掉任何计算为false的值
if(数组\过滤器($缺少\标记)){
echo“缺少标记:”.infrade(“,”,数组_键($Missing_标记))。“\n”;
}
}
SimpleXML扩展的直观性不如它的名字所暗示的那样好,但它的简单程度与使用XML所能做到的一样
<?xml version="1.0" standalone="yes"?>
<Products>
<Product>
<name>Milk</name>
<price>1.4</price>
<productinfos>
<category1 value=""/>
<category3 value="somecategory"/>
</productinfos>
</Product>
</Products>
$xml = new SimpleXMLElement(<<<XML
<?xml version="1.0" standalone="yes"?>
<Products>
<Product>
<name>Milk</name>
<price>1.4</price>
<productinfos>
<category1 value="somecategory1"/>
<category2 value="somecategory2"/>
<category3 value="somecategory3"/>
</productinfos>
</Product>
</Products>
XML
);
// $xml is a SimpleXMLElement of <Products>
foreach ($xml->children() as $product) {
if ($product->getName() != 'Product') {
// ignore <Products><Cow> or whatever, if you care
continue;
}
// start out assuming that everything is missing
$missing_tags = array(
'category1' => true,
'category2' => true,
'category3' => true,
);
// iterate through child tags of <productinfos>
foreach ($product->productinfos->children() as $productinfo) {
// element name is accessed using the getName() method, and
// XML attributes can be accessed like an array
if (isset($missing_tags[$productinfo->getName()]) &&
!empty($productinfo['value'])) {
$missing_tags[$productinfo->getName()] = false;
echo $productinfo->getName() . ": " . $productinfo['value'] . "\n";
}
}
// array_filter with one argument filters out any values that eval to false
if (array_filter($missing_tags)) {
echo "Missing tags: " . implode(", ", array_keys($missing_tags)) . "\n";
}
}