我用simplexml_load_file（）函數解析xml文件。當我遇到兩個同名的節點時，我遇到了問題。我的XML文件的結構是：用PHP解析XML。重複節點名稱
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>
這裏是代碼：
$parametrs = simplexml_load_file("my.xml");
foreach ($parametrs->company as $param) {
echo $param->name;
}
我怎樣才能呼應鏈接2，從每家公司？
<?php
$xml = '<?xml version="1.0" ?>
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>';
$parameters = new SimpleXmlElement($xml);
echo (string)$parameters->link[1]['href']; // note you must cast here!
這將輸出 '鏈接2'（周圍沒有引號）。
此外，您可能需要做一些檢查前面，這些因素的存在，但我會離開，你作爲它的問題的範圍之外;）
請注意，此解決方案取決於元素的順序。我建議你使用xPath-way來做到這一點！ Specialy如果你不自己構建XML –
謝謝。有用！ – moonvader
請注意，當您將XML文件加載到SimpleXML中時，返回的對象表示XML根節點，在這種情況下爲'
您可以使用XPath：
<?php
$sxml = simplexml_load_string('<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>');
$link = $sxml->xPath('//link[@rel="www"]');
var_dump($link);
http://codepad.viper-7.com/C4VU9q
問候
在這種情況下，這是無用的，因爲你需要提前知道'link2'的值（哪個OP肯定不會）......如果你打算使用xpath，你想告訴它找到第二個'link'節點。 – quickshiftin
你可以試試我的課它使用簡單的XML
這裏的代碼
<?php
class xml_grabber
{
private $xml_file = '' ;
private $xml_link = '' ;
private $xml_dom = '' ;
private $xml_type = '' ;
private $xml_content = '' ;
private $xml_errors = array() ;
public $xml_stack = 0 ;
public $only_text = 0 ;
private $xml_connect_count = 0 ;
public function __construct($link_file_com = '')
{
if(!$link_file_com)
{
$this->xml_errors['construct'] = 'No Xml In Construct' ;
return false;
}
elseif(!function_exists('simplexml_load_file') || !function_exists('simplexml_load_string') || !function_exists('simplexml_import_dom'))
{
$this->xml_errors['functions'] = 'simple xml function not exists' ;
return false;
}
else
{
$this->set_xml(trim($link_file_com)) ;
}
}
public function only_text($val = 0)
{
$this->only_text = $val ;
}
public function set_xml($xml)
{
if(isset($xml{3}))
{
if(file_exists($xml))
{
$this->xml_type = 1 ;
$this->xml_file = $xml ;
}
elseif(filter_var($xml, FILTER_VALIDATE_URL))
{
$this->xml_type = 2 ;
$this->xml_link = $xml ;
}
else
{
$this->xml_type = 3 ;
$this->xml_dom = $xml ;
}
}
else
{
$this->xml_type = '' ;
}
}
public function get_xml()
{
if($this->xml_type == '')
{
return false ;
}
elseif($this->xml_type == 1)
{
return $this->xml_file ;
}
elseif($this->xml_type == 2)
{
return $this->xml_link ;
}
elseif($this->xml_type == 3)
{
return $this->xml_dom ;
}
}
public function set_columns($new_columns= array())
{
return $this->xml_columns = $new_columns ;
}
public function get_columns()
{
return $this->xml_columns ;
}
public function load()
{
if($this->xml_type == '')
{
$this->xml_errors['loader'] = 'Unknown XML type' ;
return false;
}
elseif($this->xml_type == 1)
{
$xml = simplexml_load_file($this->xml_file,null, LIBXML_NOCDATA) ;
$this->xml_content = $xml ;
}
elseif($this->xml_type == 2)
{
$con = $this->connect($this->xml_link);
$this->xml_content = simplexml_load_string(trim($con),null, LIBXML_NOCDATA) ;
}
elseif($this->xml_type == 3)
{
return $this->xml_dom ;
}
}
public function fetch($return = 'array')
{
$xml = array() ;
if($this->xml_content)
{
print_r ($this->get_attribute($this->xml_content)) ;
}
}
public function get_attribute($object)
{
if((is_array($object) || is_object($object)) && count($object) > 0)
{
foreach($object as $k => $val)
{
$count = count($val) ;
$cou = count($object->$k) ;
if($count > 0 and is_array($val) || is_object($val))
{
if($cou > 1)
{
$result['item'][] = $this->get_attribute($val) ;
}
else
{
$result[$k] = $this->get_attribute($val) ;
}
}
else
{
$attr = $val->attributes() ;
if(count($attr) > 0)
{
$var ;
foreach($attr as $kk => $vv)
{
$var[$kk] = (string) $vv ;
}
if($cou > 1)
{
$result[$k][] = $var ;
}
else
{
$result[$k] = $var ;
}
}
else
{
$result[$k] = (string) $val ;
}
}
}
}
else
{
$result[] = $object ;
}
return $result ;
}
/*
public function fetch($return = 'array')
{
if($this->xml_content)
{
$rss_feed = $this->xml_content ;
$rss_title = (string) $rss_feed->channel->title ;
$rss_link = (string) $rss_feed->channel->link ;
$rss_cat = (string) $rss_feed->channel->category ;
$rss_image = (string) $rss_feed->channel->image->url ;
$rss_summary =
array
(
'info' =>
array(
'title'=>$rss_title ,
'link'=>$rss_link ,
'cat'=>$rss_cat ,
'image'=>$rss_image
) ,
'item' => array()
) ;
if(is_array($rss_feed->channel) or is_object($rss_feed->channel))
{
if(is_array($rss_feed->channel->item) or is_object($rss_feed->channel->item))
{
foreach($rss_feed->channel->item as $item)
{
if($item->enclosure && $item->enclosure->attributes())
{
$image0 = $item->enclosure->attributes() ;
$image_url = $image0 ['url'] ;
}
$result = array() ;
foreach($item as $k=>$v)
{
$result[strtolower($k)] = strip_tags((string) $v) ;
}
if(isset($image_url{1}))
{
$result['image0'] = $image_url ;
}
$rss_summary['item'][] = $result ;
}
}
elseif(is_array($rss_feed->channel->entry) or is_object($rss_feed->channel->entry))
{
foreach($rss_feed->channel->entry as $item)
{
if($item->enclosure && $item->enclosure->attributes())
{
$image0 = $item->enclosure->attributes() ;
$image_url = $image0 ['url'] ;
}
$result = array() ;
foreach($item as $k=>$v)
{
$result[strtolower($k)] = (string) $v ;
}
if(isset($image_url{1}))
{
$result['image0'] = $image_url ;
}
$rss_summary['item'][] = $result ;
}
}
}
else
{
if(is_array($rss_feed->item) or is_object($rss_feed->item))
{
foreach($rss_feed->item as $item)
{
if($item->enclosure && $item->enclosure->attributes())
{
$image0 = $item->enclosure->attributes() ;
$image_url = $image0 ['url'] ;
}
$result = array() ;
foreach($item as $k=>$v)
{
$result[strtolower($k)] = (string) $v ;
}
if(isset($image_url{1}))
{
$result['image0'] = $image_url ;
}
$rss_summary['item'][] = $result ;
}
}
elseif(is_array($rss_feed->entry) or is_object($rss_feed->entry))
{
foreach($rss_feed->entry as $item)
{
if($item->enclosure && $item->enclosure->attributes())
{
$image0 = $item->enclosure->attributes() ;
$image_url = $image0 ['url'] ;
}
$result = array() ;
foreach($item as $k=>$v)
{
$result[strtolower($k)] = (string) $v ;
}
if(isset($image_url{1}))
{
$result['image0'] = $image_url ;
}
$rss_summary['item'][] = $result ;
}
}
}
if($return == 'json')
{
return json_encode($rss_summary) ;
}
elseif($return == 'serialize')
{
return serialize($rss_summary) ;
}
elseif($return == 'xml')
{
return xml_encode($rss_summary) ;
}
else
{
return $rss_summary ;
}
}
else
{
$this->xml_errors['fetch'] = 'No Xml Content' ;
}
}
*/
protected function connect($link,$post='')
{
if(!filter_var($link, FILTER_VALIDATE_URL))
{
$this->xml_errors['connect'] = 'Not Vaild Link To Get data' ;
return false ;
}
if(function_exists('curl_init'))
{
$cu = curl_init();
curl_setopt($cu,CURLOPT_URL,$link);
curl_setopt($cu,CURLOPT_AUTOREFERER,true);
if($post != '')
{
curl_setopt($cu,CURLOPT_HEADER, 1);
curl_setopt($cu,CURLOPT_POST,3);
curl_setopt($cu,CURLOPT_POSTFIELDS,$post);
}
curl_setopt($cu,CURLOPT_USERAGENT,$_SERVER['HTTP_USER_AGENT']);
curl_setopt($cu,CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($cu,CURLOPT_SSL_VERIFYHOST,false);
curl_setopt($cu,CURLOPT_RETURNTRANSFER,true);
$co = curl_exec($cu) ;
if($co)
{
$con = $co ;
}
else
{
$this->xml_errors['connect'] = 'No Result From Curl' ;
$this->xml_errors['curl'] = curl_error($cu);
}
curl_close($cu) ;
}
if(!$con and function_exists('ini_get'))
{
$url_fopen = ini_get('allow_url_fopen') ;
if($url_fopen == 0)
{
if(function_exists('ini_set'))
{
ini_set('allow_url_fopen', 1) ;
}
$check_fopen = 1 ;
}
else
{
$check_fopen = 0 ;
}
if($check_fopen == 1)
{
$url_fopen = ini_get('allow_url_fopen') ;
}
if($url_fopen == 1)
{
if(function_exists('file_get_contents') and !$con)
{
$con = @file_get_contents($link) ;
if($con)
{
$con ;
}
else
{
$this->xml_errors['connect'] = 'No Result From file_get_contents' ;
}
}
elseif(function_exists('readfile') and !$con)
{
$con = @readfile($link);
if($con)
{
$con ;
}
else
{
$this->xml_errors['connect'] = 'No Result From readfile' ;
}
}
elseif(function_exists('file') and !$con)
{
$con = @file($link) ;
if($con)
{
$con ;
}
else
{
$this->xml_errors['connect'] = 'No Result From file' ;
}
}
}
}
if(!$con)
{
$this->xml_errors['connect'] = 'Curl And Allow Url Fopen Disabled On Server' ;
return false ;
}
elseif(stripos($con,'DDoS protection by CloudFlare') and $this->xml_connect_count < 1)
{
echo '<h2> Curl Answer No : '.$this->xml_connect_count.' </h2>'.$con.'<br />';
preg_match('/'.preg_quote('.val(').'(.*?)'.preg_quote(');').'/is', $con, $match);
$matc = str_replace('+', " + ", $match[1]) ;
$matc = str_replace('*', " * ", $matc) ;
$post = eval ("return $matc ;") ;
$html=new DOMDocument();
$html->loadHTML($con) ;
$xpath = new DOMXPath($html);
$tags = $xpath->query('//input[@type="hidden"]');
$fields = array();
foreach ($tags as $tag) {
$fields[trim($tag->getAttribute('name'))] = trim($tag->getAttribute('value')) ;
}
$post_data = 'act=jschl&jschl_vc='.$fields['jschl_vc'].'&jschl_answer='.$post ;
echo '<h2> I will post this info to curl </h2>'.$post_data.'<br /> ' ;
$this->xml_connect_count = $this->xml_connect_count + 1 ;
sleep(5) ;
$con = $this->connect($link , $post_data) ;
echo '<h2> Curl Answer No : 1 </h2>'. $con.'<br />' ;
preg_match('/^Set-Cookie: (.*?);/m', $con, $m);
echo '<h2> Cookie from Result </h2>' ;var_dump(parse_url($m[1]));
}
else
{
return $con ;
}
}
public function get_error()
{
return $this->xml_errors ;
}
}
?>
以下是如何使用它
<?php
$rss = new xml_grabber('xml.xml') ;
$rss -> load() ;
$x = $rss -> fetch() ;
print_r ($x) ;
?>
例
<?xml version="1.0" encoding="Windows-1256"?>
<rss version="2.0">
<channel>
<info name="xml_reader" vesrion="1.0" author="sec.php"></info>
<title> Xml By sec.php </title>
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>
<company>
<name>Test Co</name>
<link href="link1" rel="self"/>
<link href="link2" rel="www"/>
</company>
</channel>
</rss>
結果 陣列 （ [頻道] =>數組 （ [信息] =>數組 （ [名稱] => xml_reader [vesrion] => 1.0 [作者] => sec.php ）
[title] => Xml By sec.php
[item] => Array
(
[0] => Array
(
[name] => Test Co
[link] => Array
(
[0] => Array
(
[href] => link1
[rel] => self
)
[1] => Array
(
[href] => link2
[rel] => www
)
)
)
[1] => Array
(
[name] => Test Co
[link] => Array
(
[0] => Array
(
[href] => link1
[rel] => self
)
[1] => Array
(
[href] => link2
[rel] => www
)
)
)
[2] => Array
(
[name] => Test Co
[link] => Array
(
[0] => Array
(
[href] => link1
[rel] => self
)
[1] => Array
(
[href] => link2
[rel] => www
)
)
)
)
)
）
這看起來很複雜，因爲這個問題。你的班級究竟做了什麼？ –
我用它來閱讀網站或文件或dom的rss –
它看起來不錯，但我認爲它不會真的幫助這裏。此外，這裏的XML只是XML，它不是RSS，也不與RSS有任何關係。 –
當您將XML文件加載到SimpleXML中時，返回的對象表示XML根節點，您的情況爲<company>。
所以，你只需要得到第二個鏈接標籤，並得到它的href。
$parametrs = simplexml_load_file("my.xml");
// you need to case here, as this is actually a SimpleXML element, not a string
echo (string)$parametrs->link[1]['href'];
你真的應該習慣於在此處將字符串轉換爲（字符串）......在這種情況下，回聲會爲您做到這一點，但如果您不知道需要強制轉換，稍後您可以指定一個值而不是回聲，並想知道爲什麼它不是一個字符串。 – quickshiftin
@quickshiftin：啊，是的，沒錯，SimpleXML實際上返回一個SimpleXMLElement，而不是一個字符串。我會添加演員。 –
我想得到link2 url。 – moonvader
爲什麼你想要第二個鏈接？它真的是你想要的，還是你想要鏈接rel =「www」？ –