Php DOMDocument creation, loading, parsing xml document code

The code is as follows:

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$ Xml_str = "<? Xml version = '1. 0'?> "; $ Xml_str. = "<books> "; $ Xml_str. = "<book> "; $ Xml_str. = "<title> harry potter </title> "; $ Xml_str. = "<author> j. k. rowling </author> "; $ Xml_str. = "<publisher> warner bros. </publisher> "; $ Xml_str. = "<price> 39.0 </price> "; $ Xml_str. = "</book> "; $ Xml_str. = "</books> "; $ Dom = new domdocument; $ Dom-> loadxml ($ xml_str ); Echo $ dom-> savexml (); $ Dom-> save ("test. xml "); // Load the xml document using domdocument $ Dom = new domdocument; $ Dom-> load ('17-1. XML '); $ Root = $ dom-> documentelement;

// Parse the xml document

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$ Doc = new domdocument (); $ Doc-> load ("17-1.xml "); $ Books = $ doc-> getelementsbytagname ("book "); Foreach ($ books as $ book) { $ Authors = $ book-> getelementsbytagname ("author "); $ Author = $ authors-> item (0)-> nodevalue;     $ Publishers = $ book-> getelementsbytagname ("publisher "); $ Publisher = $ publishers-> item (0)-> nodevalue;     $ Titles = $ book-> getelementsbytagname ("title "); $ Title = $ titles-> item (0)-> nodevalue;     $ Prices = $ book-> getelementsbytagname ("price "); $ Price = $ prices-> item (0)-> nodevalue;     Echo "$ title-$ author-$ publisher-$ price "; Echo "<br/> "; Echo "<br/> "; }

/*
17-1.xml

The code is as follows:

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<? Xml version = "1.0" encoding = "gb2312"?> <Books> <Book> <Title> learning php5 </title> <Author> david </author> <Publisher> white water press </publisher> <Price> 29.90 </price> </Book> <Book> <Title> learning xml </title> <Author> jeffson </author> <Publisher> white water press </publisher> <Price> 50.79 </price> </Book> <Book> <Title> using perl </title> <Author> lucas </author> <Publisher> white water press </publisher> <Price> 17.00 </price> </Book> <Book> <Title> windows networks </title> <Author> paul </author> <Publisher> white water press </publisher> <Price> 32.99 </price> </Book> <Book> <Title> fly leaf </title> <Author> jenny </author> <Publisher> white water press </publisher> <Price> 19.50 </price> </Book> </Books>

*/
?>