Php simplexmlElement: namespace implementation code for operating xml

After reading this question, the first reaction was the relationship between namespace, but I never used simplexml to operate namespace. So I opened the manual and checked the information. The problem was not solved, google eventually solved the problem.

A friend who asked the question posted the data source, from:
Copy codeThe Code is as follows:
<Feed xmlns = 'HTTP: // www.w3.org/2005/Atom' xmlns: openSearch = 'HTTP: // your xmlns: gContact = 'HTTP: // schemas.google.com/contact/2008'xmlns: batch = 'HTTP: // schemas.google.com/gdata/batch' xmlns: gd = 'HTTP: // schemas.google.com/g/2005' gd: etag = 'W/"CUMBRHo_fip7ImA9WxRbGU0. "'>
Liz@gmail.com
<Updated> 2008-12-10T10: 04: 15.446Z </updated>
<Category scheme = 'HTTP: // schemas.google.com/g/2005?kind' term = 'HTTP: // schemas.google.com/contact/2008?contact'/>
<Title> Elizabeth Bennet's Contacts </title>
<Link rel = 'HTTP: // schemas.google.com/g/2005?feed' type = 'application/atom + xml' href = 'https: // your/>
<Link rel = 'HTTP: // schemas.google.com/g/2005?post' type = 'application/atom + xml' href = 'https: // www.google.com/m8/feeds/contacts/liz?40gmail.com/full'/>
<Link rel = 'HTTP: // schemas.google.com/g/2005?batch' type = 'application/atom + xml' href = 'https: // your/>
<Link rel = 'self 'Type = 'application/atom + xml' href = 'https: // www.google.com/m8/feeds/contacts/liz?40gmail.com/full? Max-results = 25'/>
<Author>
<Name> Elizabeth Bennet </name>
<Email> liz@gmail.com </email>
</Author>
<Generator version = '1. 0' uri = 'HTTP: // www.google.com/m8/feeds'> Contacts </generator>
<OpenSearch: totalResults> 1 </openSearch: totalResults>
<OpenSearch: startIndex> 1 </openSearch: startIndex>
<OpenSearch: itemsPerPage> 25 </openSearch: itemsPerPage>
<Entry gd: etag = '"Qn04eTVSLyp7ImA9WxRbGEUORAQ."'>
Http://www.google.com/m8/feeds/contacts/liz%40gmail.com/base/c9012de
<Updated> 2008-12-10T04: 45: 03.331Z </updated>
<App: edited xmlns: app = 'HTTP: // www.w3.org/2007/app'> 2008-12-10T04: 45: 03.331Z </app: edited>
<Category scheme = 'HTTP: // schemas.google.com/g/2005?kind' term = 'HTTP: // schemas.google.com/contact/2008?contact'/>
<Title> Fitzwilliam Darcy </title>
<Gd: name>
<Gd: fullName> Fitzwilliam Darcy </gd: fullName>
</Gd: name>
<Link rel = 'HTTP: // schemas.google.com/contacts/2008/rel?photo'type = 'image/* 'href = 'https: // your gd: etag =' "Your." '/>
<Link rel = 'self 'type = 'application/atom + xml' href = 'https: // www.google.com/m8/feeds/contacts/liz?40gmail.com/full/c9012de'/>
<Link rel = 'edit' type = 'application/atom + xml' href = 'https: // www.google.com/m8/feeds/contacts/liz?40gmail.com/full/c9012de'/>
<Gd: phoneNumber rel = 'HTTP: // schemas.google.com/g/2005#home' primary = 'true'> 456 </gd: phoneNumber>
<Gd: extendedProperty name = 'Pet 'value = 'hamster'/>
<GContact: groupMembershipInfo deleted = 'false' href = 'HTTP: // www.google.com/m8/feeds/groups/liz?40gmail.com/base/270f'/>
</Entry>
</Feed>

This structure is shown in the preceding address. This is the XML data that I have formatted. Now, we need to obtain the XML data similar to "<gd: phoneNumber rel = 'HTTP: // value in schemas.google.com/g/2005#home'primary = 'true'> 456 </gd: phoneNumber>.

The final code is as follows:
Copy codeThe Code is as follows:
$ X = new SimpleXmlElement ($ str );
Foreach ($ x-> entry as $ t ){
Echo $ t-> id. "<br> ";
Echo $ t-> updated. "<br/> ";
$ Namespaces = $ t-> getNameSpaces (true );
$ Gd = $ t-> children ($ namespaces ['gd ']);
Echo $ gd-> phoneNumber;
}

Of course, if it is not written as above, it can also be written as follows:
Copy codeThe Code is as follows:
$ X = new SimpleXmlElement ($ str );
Foreach ($ x-> entry as $ t ){
Echo $ t-> id. "<br> ";
Echo $ t-> updated. "<br/> ";
// $ Namespaces = $ t-> getNameSpaces (true );
// Note the difference between this and the above section
$ Gd = $ t-> children ('HTTP: // schemas.google.com/g/2005 ');
Echo $ gd-> phoneNumber;
}

Just like the second method, it is hard-coded. This is not good. In case of any change, you have to change N more codes.
The problem arises one after another, such as the following section:
Copy codeThe Code is as follows:
<Event: event>
<Event: sessionKey> </event: sessionKey>
<Event: sessionName> Learn QB in Minutes </event: sessionName>
<Event: sessionType> 9 </event: sessionType>
<Event: hostWebExID> </event: hostWebExID>
<Event: startDate> 02/12/2009 </event: startDate>
<Event: endDate> 02/12/2009 </event: endDate>
<Event: timeZoneID> 11 </event: timeZoneID>
<Event: duration> 30 </event: duration>
<Event: description> </event: description>
<Event: status> NOT_INPROGRESS </event: status>
<Event: panelists> </event: panelists>
<Event: listStatus> PUBLIC </event: listStatus>
</Event: event>

This non-standard XML does not define a namespace. What should I do? In this case, SimpleXmlElement can be solved directly, but it will report warnging because he thinks the namespace event does not exist.
Solution:
Copy codeThe Code is as follows:
$ Xml = @ new SimpleXmlElement ($ str); // Add @ to the front to stop the error.
Echo "<pre> ";
Print_r ($ xml );

Currently, this solution is better.

PHP SimpleXML Functions
Http://www.jb51.net/w3school/php/php_ref_simplexml.htm
PHP SimpleXML
Http://www.jb51.net/w3school/php/php_xml_simplexml.htm