If it doesn't have the container closing tags then it won't be valid XML (which is certainly possible for a config file, though kind of rude of them to do it that way). No decent XML generator will let you do that. A straightforward way to remove them is to do something like:

$mycontainerless=$tree->as_XML();
$mycontainerless=~%</container>%%gi;

[download]

before you write it to the file.

In reply to Re^5: how to update an xml file by read data from csv file by bitingduck
in thread how to update an xml file by read data from csv file by Vijay81

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