How to write XML in PHP

How does PHP write XML in the PHP file include $ _ SESSION ['phone'] and write its value into the XML file ?, Http://www.jb51.net/article/21450.htm,xmland PHP are mutually converted and encapsulated. :xmlparse.php: how to write XML
In the php file, there is a $ _ SESSION ['phone']. how can I implement this function to write its value to the XML file?

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Http://www.jb51.net/article/21450.htm
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Conversion between XML and PHP encapsulation function: xmlparse. php
Demo:

PHP code

Include (dirname (_ FILE __). "/xmlparse. php "); $ arr = array (1," name "," admin ", 100); $ contXML = dump_xml_config ($ arr," xml "," UTF-8 "); // put the file file_put_contents_safe ("/path/test. xml ", $ contXML," w "); echo $ contXML; # Source code #
  #
  
   
# <0> 1
   # <1> name
   # <2> admin
   <3> 100
   #
  
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   Discussion
   

   
Conversion between XML and PHP encapsulation function: xmlparse. php
   
Demo:
   
PHP code
   

   
Include (dirname (_ FILE _). "/xmlparse. php ");
   
$ Arr = array (1, "name", "administrator", 100 );
   
$ ContXML = dump_xml_config ($ arr, "xml", "UTF-8 ");
   
// Put the file
   
File_put_conte ......