updating xml file using php - php

Question

hey there i have an xml file that has what i need to do is to add an event with same location name A
<timetable>
<location name="A" >
<event >
<title>EVENT TITLE </title>
<subtitle>Amman -text </subtitle>
<description>Amman -text </description>
</event>
</location>
</timetable>
so it can be like this
<timetable>
<location name="A" >
<event >
<title>EVENT TITLE </title>
<subtitle>Amman -text </subtitle>
<description>Amman -text </description>
</event>
<event >
<title>EVENT TITLE </title>
<subtitle>Amman -text </subtitle>
<description>Amman -text </description>
</event>
</location>
</timetable>
i got stuck in my php code where i want to cheack if the event is created or not if its created modify my xml with name of the event and add the new one
this is my full php inserting code `
if(isset($_GET['coname'])){
$coid = $_GET['id'];
$cname=$_GET['coname'];
$title = $_POST ['title'];
$sub = $_POST ['sub'];
$description = $_POST ['description'];
$location = $_POST ['location'];
$event = $_POST ['event'] ;
$str =$_POST ['str'] ;
$end =$_POST ['end'] ;
$topic = $_POST ['topic'] ;
$sql="INSERT INTO timeline (title,sub,description,location,event,str,end,topic,coid)
VALUES
('$title','$sub','$location','$location','$event','$str','$end','$topic','$coid')";
if (!mysqli_query($con,$sql))
{
die('Error: ' . mysqli_error($con));
}
echo "1 record added";
$q = mysqli_query($con,"SELECT * FROM timeline where coid = $coid") or die(mysqli_error());
$xml = '<timetable start="'.$st.'" end="'.$en.'" interval="'.$in.'" title="'.$da.'">';
while($r = mysqli_fetch_array($q)){
$loc=$r['topic'];
$evns=$r['str'];
$evne= $r['end'];
$xml .= '<location name="'.$loc.'" subtext=" ">';
$xml .= '<event start="'.$evns.'" end="'.$evne.'">';
$xml .= "<title>".$r['title']."</title>";
$xml .= "<subtitle>".$r['location']."</subtitle>";
$xml .= "<description>".$r['description']."</description>";
$xml .= "</event>";
$xml .= "</location>";
}
$xml .= "</timetable>";
$sxe = new SimpleXMLElement($xml);
$sxe->asXML('xml/'.$cname.'.xml'); `

Answer 1

Amer, rather than creating the XML from strings, I'd use the simplexml methods:
Inserting a new <event> in existing XML:
$xml = simplexml_load_string($x); // assume XML in $x
$loc = $xml->xpath("location[#name = 'A']")[0]; // select <location> with name = A
$event = $loc->addChild("event");
$event->addAttribute("start", "2013-05-20 10:00:00");
$event->addAttribute("end", "2013-05-20 14:30:00");
$event->addChild("title", "some title");
$event->addChild("subtitle", "some subtitle");
$event->addChild("description", "some description");
see it working: http://codepad.viper-7.com/12xtVD

Answer 2

From what I understand, you want to create a child element. This is how I would go about doing this:
PHP:
$eleone=$_POST['elementone'];
$eletwo=$_POST['elementtwo'];
$file = "verbs.xml";
$openf = fopen($file, "c+") or die ("Cannot open file");
$str = fread ($openf, filesize($file));
$xml = new DOMDocument('1.0', 'iso-8859-1');
$xml->formatOutput=TRUE;
$xml->preserveWhiteSpace = FALSE;
$xml ->loadXML($openf) or die ("There has been an error with opening the XML file. Our team has been notified and will start working to fix this problem.");
//this is the original document
echo "<xmp>OLD:\n". $xml->saveXML(). "<xmp>";
//this is how you get the document element
$root= $xml ->documentElement;
$firstnode= $root->firstChild;
//good stuff right here; how to make a node
$ori= $firstnode->childNodes->item(2);
$eleadd= $xml->createElement($elementone);
$eleaddt= $xml->createTextNode($//what gets shown in $eleadd );
$eleadd->appendChild("$idt");
If you don't want all of this, you may be able to delete some non-crucial things like the parent elements. If you need more information, http://www.phpeveryday.com/articles/PHP-XML-Adding-XML-Nodes-P414.html is the place to go, or where I found my information.