[SOLVED] what to look for when I get Fatal error: Cannot instantiate non-existent class:?

darksniperx · October 22, 2007

I havent done any changes to my php class files, I was working on tidying up my html form code, then when I test my website out, I get

Fatal error: Cannot instantiate non-existent class:fusion ... line 15

<?php
class forms
{
	var $script;
//temporary variables to use with forms
	var $js_script;
	var $css_script;
	var $body_onload_content;
	var $body_content;

function forms()
    {
    	$this->script = new fusion;
...

the thing is that the code worked, did not do any changes to it "I think". What can I look for to find the cause of the problem. My php is 4.3.9.

thx.

trq · October 22, 2007

You need to make sure the class fusion is defined somewhere within scope.

darksniperx · October 22, 2007

I found the cause of the problem. now what to do to fix it.

here is my index page

<?php
include ("forms.php");
$webForm = "Entry"; //specify which form you want to work with
$form = new forms; // create an instance of selected class
$form->setFormData($webForm); // populate class variables selected form
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<meta http-equiv="Content-Script-Type" content="text/javascript; charset=UTF-8;" />
<title>Index Page!</title>
<?php
$form->outputHeaderData(); // echo any content in the head section
?>
</head>
<body <?php $form->ouputBodyAttributeData(); // echo any content that is suppose to be in body tag ?>>
<?php
$form->outputForm(); // echo any content in the body section
?>
</body>
</html>

forms.php includes the requested form contained in a different php file and then echoes it with

<?php
class forms
{
	var $script;
//temporary variables to use with forms
	var $js_script;
	var $css_script;
	var $body_onload_content;
	var $body_content;

function forms()
    {
	include 'fusion.php';
    	$this->script = new fusion;

	//when form is being submitted, the following verifyies which form then loads appropriate methods.
    	if($_POST['form_feed_submit'])
	{
		$this->formFeed_submit();
	}

    }

//sets variable data that will be later used in the forms
function setFormData($formName)
{
	include $formName . '.php';
	include '../scripts/' . $formName . '_js_script.php';
	$this->js_script = 'show' . $formName . 'JS';
	$this->body_onload_content = "onload='loader();'";
	$this->body_content = 'show'.$formName; 
}

//outputs data that is suppose to be in header tag
function outputHeaderData()
{
	echo "<script type='text/javascript'>";
	echo "\n";
	$x = $this->js_script;	
	$x();
	echo "</script>";
	echo "\n";	
}

//output data inside body tag
function ouputBodyAttributeData()
{
	echo $this->body_onload_content;
}

//writes form data to html file for the requested form
function outputForm()
{
	$x = $this->body_content;
	$x();
}

//prints the data from category table with check boxes

function printCategoryBoxes()
{
	$this->script->dbConnect();
	$this->script->selectDb();
	$category = mysql_query("SELECT * FROM category") OR die(mysql_error());
	while($cat = mysql_fetch_array($category))
	{
		echo "<label><input type='checkbox' name='cat_id[]' value='".$cat['cat_id']."'/>".$cat['c_label']."</label>";
	}
	$this->script->closeDbConnection();
}

the php file of the content that is being submitted.

<?php
function showEntry()
{
?>
<form method="post" action="<?php print $_SELF; ?>" onsubmit="validator()">

<h1>Welcome to Fusion Project!</h1>
<h3>You are about to create a news entry.</h3>
<h3>Remember that <font color='red'>*</font> means that the field is required and if you are an <u>advanced user</u><br/>
you can press <u>advanced button</u> to add a variety of options and other usefull information.</h3>
<hr />
<p><font color='red'>*</font><strong>Story Title <font size="-1">(Please enter a descriptive title for the story you're linking to.)</font></strong></p>
<p>
    <input type='text' name='title_text' size="100" />
  </p>
<p><font color='red'>*</font><strong>Story Description <font size="-1">(Write your own description of the news story.)</font></strong></p>
<p>
  <textarea cols="75" rows="5" name="content_text" ></textarea>
  
</p>
<font color='red'><strong>*</strong></font><strong>Story Link <font size="-1">(Link that points to the source of the story.)</font></strong>
<p>
  <input type='text' name='l_href' size="100" />
</p>
<strong><font color="#FF0000">*</font>Categories:</strong>
<p>
<?php

$newForm = new forms; //*** this line creates problem
$form->printCategoryBoxes();//print checkboxes
?>

when I call $newForm = new forms; in php html file I get

Fatal error: Cannot redeclare class fusion in /home/public_html/alex/test/fusion.php on line 3

fusion class

<?php
class fusion
{
VAR $CON,$SQL;
VAR $database_location = 'localhost';
...

dont know what to do.

btherl · October 23, 2007

Try include_once instead of include

darksniperx · October 23, 2007

you change everywhere include to include_once

darksniperx · October 23, 2007

nice it works now.

I should have studied more about include tag, only if I knew.

include_once() should be used in cases where the same file might be included and evaluated more than once during a particular execution of a script, and you want to be sure that it is included exactly once to avoid problems with function redefinitions, variable value reassignments, etc.

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[SOLVED] what to look for when I get Fatal error: Cannot instantiate non-existent class:?

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