phpbeginners
Posting Whiz in Training
226 posts since Jul 2009
Reputation Points: 12
Solved Threads: 32
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PHP class + DomDocument + SESSION
I'm construted a php-class where I create and save some elements in an XMLfile. Outside that class I instantiate the class and save it in a _SESSION['obj'] if the session has not been created yet, otherwise I want to get the document back and add new elements to the XMLfile. My problem is that I can not access the document after I have saved it. The essential parts of the code are:
<?php
session_start();
class Bovision {
var $dom; var $root; var $body;var $table;
function __construct(){
$html = '<html><head><title>Bovision</title></head><body><table></table></body></html>';
global $dom, $body;
$dom = new DomDocument('1.0','utf-8');
//header("Content-Type: text/plain");
$dom->loadHtml($html);
$root = $dom->createElement('root');
$dom->appendChild($root);
$body = $dom->getElementsByTagName('body')->item(0);
//$table = $dom->getElementsByTagName('table')->item(0);
$body->appendChild($table);
$root->appendChild($body);
}
function dbSearch($query){
$con = mysql_connect("localhost", "root", "pwd") or die("Error!!!!");
mysql_select_db("myDB", $con);
$fromDB = array();
$result = mysql_query($query, $con) or die(mysql_error());
$i = 0;
while($row = mysql_fetch_array($result)){
$fromDB[$i] = $row;
$i++;
}
mysql_close($con);
return $fromDB;
}
function createBoxes($args, $name){
global $dom, $body;
$select = $dom->createElement('select');
$select->setAttribute('id', $name);
$option = $dom->createElement('option');
//$option->setAttribute('name', $name);
$option->nodeValue = "Välj ".$name;
//$text = $dom->createTextNode("Välj ".$name);
//$option->appendChild($text);
$select->appendChild($option);
for($i = 0; $i < count($args); $i++){
$option = $dom->createElement('option');
$option->nodeValue= $args[$i][0];
//$text = $dom->createTextNode($args[$i][0]);
//$option->appendChild($text);
$select->appendChild($option);
}
$body->appendChild($select);
//echo $dom->saveXML();
}
function save(){
global $dom;
echo $dom->saveXML();
}
function getDom(){
global $dom;
return $dom;
}
function disp(){
global $dom;global $body;
$p = $dom->createElement('p');
$text = $dom->createTextNode("eefefefef");
$p->appendChild($text);
$body->appendChild($p);
}
}
?>
<?php
if(!session_is_registered('bo')){
$_SESSION['bo'] = new MyClass();
$query = "SELECT DISTINCT lan FROM bostader ORDER BY pris";
$result = $_SESSION['bo']->dbSearch($query);
$_SESSION['bo']->createBoxes($result, "lan");
$query = "SELECT DISTINCT objekttyp FROM bostader ORDER BY pris";
$result = $_SESSION['bo']->dbSearch($query);
$_SESSION['bo']->createBoxes($result, "typ");
$query = "SELECT DISTINCT rum FROM bostader ORDER BY pris";
$result = $_SESSION['bo']->dbSearch($query);
$_SESSION['bo']->createBoxes($result, "rum");
$_SESSION['bo']->save();
}
else{
/*Here I want to be able to change the elements in the XML-document or add some new elemens. The function disp() has just been created to test if I can change something in the document*/
/*
Tried to get $dom variable from the class by writing $_SESSION['bo']->dom but the does not work neither :S I also created a method called getDom that returns the $dom variable in MyClass but it seems to be empty.
*/
$_SESSION['bo']->disp();
$_SESSION['bo']->save();
}
?>
Could anyone take a look at the problem and give me some tips...
as far as my knowledge is concern...
var $dom; $body, $root is global inside your function....if you use that inside the class use that in this format "$this->dom; $this->body; $this->root".
change all your variables with this "$this->[variables];
i hope it helps.
Thanks, now the code looks a little bit better. I can't still change or add the XML-file created at the start of the session. Any tips?
tips you can extend your parent classes instead of inserting new object inside your class.
class Cart {
var $items; // Items in our shopping cart
// Add $num articles of $artnr to the cart
function add_item($artnr, $num) {
$this->items[$artnr] += $num;
}
// Take $num articles of $artnr out of the cart
function remove_item($artnr, $num) {
if ($this->items[$artnr] > $num) {
$this->items[$artnr] -= $num;
return true;
} elseif ($this->items[$artnr] == $num) {
unset($this->items[$artnr]);
return true;
} else {
return false;
}
}
}
[here's the extension :-)]
class Named_Cart extends Cart {
var $owner;
function set_owner ($name) {
$this->owner = $name;
}
} phpbeginners
Posting Whiz in Training
226 posts since Jul 2009
Reputation Points: 12
Solved Threads: 32
tips you can extend your parent classes instead of inserting new object inside your class.
class Cart { var $items; // Items in our shopping cart // Add $num articles of $artnr to the cart function add_item($artnr, $num) { $this->items[$artnr] += $num; } // Take $num articles of $artnr out of the cart function remove_item($artnr, $num) { if ($this->items[$artnr] > $num) { $this->items[$artnr] -= $num; return true; } elseif ($this->items[$artnr] == $num) { unset($this->items[$artnr]); return true; } else { return false; } } } [here's the extension :-)] class Named_Cart extends Cart { var $owner; function set_owner ($name) { $this->owner = $name; } }
Can I extend the class from the $_SESSION variable? Is it impossible to just get back the DomDocument object and just change it? I think of the document as an object with some methods and a container with data. Hope I haven't got it wrong. I would prefer not extending the class...
I am talking about your class not the session. I am suggesting put your domDocument as parent and extends some parts of your class code. But if your code is working fine never mind my suggestion.
phpbeginners
Posting Whiz in Training
226 posts since Jul 2009
Reputation Points: 12
Solved Threads: 32
Thanks for helping me phpbeginners :) I have solved the problem now but I will take a look at your suggestions and try to follow them. Thanks again and have a nice one :)
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