php - SimplXML 'Call to a member function on a non-object'

[younoname]

I keep getting the following error:Fatal error: Call to a member function addChild() on a non-object in /www/zzl.org/t/h/e/theseminary/htdocs/submit.php on line 3My code, in its own php file, is as follows:\[code\]<?php$xmlobject = simplexml_load_file('data.xml');$xmlobject[0]->channel[0]->posts[0]->addChild("item");$itemcount = $xmlobject->channel->posts->count();$xmlobject->channel[0]->posts[0]->item[$itemcount]->addChild("title", $title);$xmlobject->channel->posts->item[$itemcount]->addChild("content", $content);$xmlobject->asxml("data.xml");header( "Location: $url" );?>\[/code\]I realize this question has been asked multiple times, but I could not find a solution to my problem.