About PHP dom can not be used domdocument->load directly read the XML written in the current PHP

About PHP Dom can not domdocument->load directly read the XML written in the current PHP
Do you have PHP dom can not domdocument->load read in other locations of the file, and directly read the XML written in the current PHP file As String, there is no way to print out the DOMDocument XML content directly in the page Instead of Domdocument->save saved to another file. No way to find out, please tell me. Thank you
------Solution--------------------
Manual:
Class DOMDocument {
BOOL LoadXML (string source [, int options])
}
That is Domdocument->loadxml (' .... ')

Domdocument->save will return the corresponding XML string regardless of whether there is a file name to save as a parameter
Echo Domdocument->save ()

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