[SOLVED] simpleXML problem

[bobbinsbro]

hi guyz.

i'm having a very weird problem with simpleXML. here's the troublesome bit of code:

$xmlStr = '';
foreach ($securityXML->$permission->children() as $child){
if ($user != strip_tags($child->asXML())) $xmlStr .= $child->asXML();
}
unset($child);
$securityXML->$permission = $xmlStr;

 

my problem is that $xmlStr contains valid xml (e.g., '<some_node>some_value</some_node> etc.) but after being set as the contents of $permission, the xml string looks like it was passed through htmlentities() (all the '<' are turned to <, all '>' are turned to > etc.).

 

i tried appending $xmlStr as a child of $permission with the asChild() method, with the same results (only the xml string wasn't where i wanted it ).

 

the main xml object looks something like this before i add the $xmlStr:

<security>
      <perm1>
           <user>user_id</user>
      </perm1>
      <perm2>
      </perm2>
      <perm3>
      </perm3>
</security>

 

after i add the $xmlStr it looks like this:

<security>
      <perm1>
           <user>user_id</user>
      </perm1>
      <perm2>
           <user>user_id</user>
      </perm2>
      <perm3>
      </perm3>
</security>

 

does any1 have any idea what's going on?

[RichardRotterdam]

before reading everything

just one question

should the dollar character be removed on permission?

 

$securityXML->permission

you are accessing a variable within the object so the $ character should not be there

[bobbinsbro]

the $ should be there - the $permission variable contains the name of the node i am trying to change. e.g.:

$permission = 'perm1';

$securityXML->$permission == $securityXML->perm1; //true

[bobbinsbro]

bump 

[RichardRotterdam]

I am kind of confused what it is you want to have as result xml.

let's say you have the following start xml

<security>
      <perm1>
           <user>user_id</user>
      </perm1>
      <perm2>
      </perm2>
      <perm3>
      </perm3>
</security>

Now on what conditions and what exactly has to change in this xml file? Can you show a samle of xml what the result could be and under which conditions?

 

Also if it's just the tags output that is incorrect you could use html_entity_decode

 

 

 

[bobbinsbro]

ok. in more depth. this is a permissions editing thing. the permissions are stored as an xml string in a DB. i get said string from the db, load it into a simplXMLElement. in the bit of code i pasted, i'm changing a user's permissions.

 

heres the logic:

if the posted permission value is different than the user's current permission{

      add the user to the new permission node;

 

      scan through the old permission node of the user, and save all users into an xml string

      (the string will look something like this: <user>2</user><user>5</user>)

 

      save the xml string, now not containing the current user being edited, back into the permission node.

}

 

that's what the code posted above does. an example:

 

before i run the code

<security>
      <perm1>
           <user>1</user>
           <user>2</user>
      </perm1>
      <perm2>
      </perm2>
      <perm3>
      </perm3>
</security>

 

now, i edit user 2, and move him to perm2 node. this is the result in the DB:

<security>
      <perm1>
           <user>1</user>
      </perm1>
      <perm2>
           <user>2</user>
      </perm2>
      <perm3>
      </perm3>
</security>

 

i dumped the contents of the temporary xml string (the variable $xmlStr) and the '<' '>' characters are intact. then i dumped the simpleXMLElement object after i set $xmlStr into the permission node, and the '<' changed to '<'.

 

as i said, i tried doing the same thing with addChild() with the same results. i should note that in a different place in the same code i use addChild() and the xml is created just fine. is there a way to prevent simpleXML from htmlentities()-ing my xml string (since i think that this is a security measure of the simpleXML class)?

[RichardRotterdam]

try the following

<?php
//xml file in string change this to your db fetch
$xmlString=<<<xml
<security>
      <perm1>
           <user>1</user>
           <user>2</user>
           <user>3</user>
      </perm1>
      <perm2>
      	<user>4</user>
      	<user>5</user>
      </perm2>
      <perm3>
      </perm3>
</security>
xml;

//create DOM
$dom = new DOMDocument();
$dom->loadXML($xmlString);

function user_change_permission($userId,$permLvl){
global $xmlString;
global $dom;

//first remove the user from the old permission
$x = new DomXPath($dom);
$userList=$x->query("//security/*/user[text()='{$userId}']");

foreach ($userList as $domElement){
	$domNode = $dom->importNode($domElement, true);
   	$parent = $domNode->parentNode;  
   	$parent->removeChild($domNode);
}

//now place it in the new permission
$x = new DomXPath($dom);
$permissionList=$x->query("//security/perm{$permLvl}");

foreach ($permissionList as $domElement){
	$permissionNode = $dom->importNode($domElement, true);
  	foreach ($userList as $domElement){
   		$domNode = $dom->importNode($domElement, true);
   		$permissionNode->appendChild($domNode);
	}

}

}
user_change_permission(1,2);
$newXML = $dom->saveXML();
echo $newXML; 

[bobbinsbro]

i will definitely use that. i was using simpleXML because i thought that it had less of a memory footprint (since it's a so much smaller class), but i didn't test my theory, which was a bit daft of me. i just ran a test, and the difference is about 100 bytes... i feel kinda silly.

 

thanx Dj Kat.

[RichardRotterdam]

glad it works enjoy