How to open, edit child and save to file in simple XML php

This is my code

$data = simplexml_load_file("data.xml");
$data -> mysuname = $_POST["mysqluname"];
$data -> myspwd = $_POST["mysqlpwd"];
$data -> mysdb = $_POST["db_name"];
$data -> saveXml();

But when I open the data.xml I couldn't find these values But echoing $_POST[variable] prints the valu开发者_开发技巧e, so its not null

I figured out that, the problem is with SELinux in fedora, I disabled it and everything is fine.

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you should try this :

$data = simplexml_load_file("data.xml");
$data -> mysuname = $_POST["mysqluname"];
$data -> myspwd = $_POST["mysqlpwd"];
$data -> mysdb = $_POST["db_name"];
$data -> asXML("data.xml");

http://www.php.net/manual/en/simplexmlelement.asxml.php