Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc. If the script requires a 
database to demonstrate the issue, please make sure it creates 
all necessary tables, stored procedures etc.

Please avoid embedding huge scripts into the report.

And please explain what "crash" means in this context. A segfault? Then please also provide a backtrace.

This is complete script
<?php

if(!defined("IN_RESCHOOL")) exit; 							//If not defined "go costant" exit
error_reporting("E_ALL");
$file = new file;
$page = new page;

function inc($file,$once=0) {
	if($once==0) {
		include($file);
	}
	if($once==1) {
		include_once($file);
	}
}

class file
{
 	var $stream;
	function read($filename)
	{
		$this->stream = fopen('./'.$filename, 'r');
		$return = fread($this->stream,filesize($filename));
		fclose($this->stream);
		$this->stream=NULL;  //Crash apache (???)
		return($return);
	}
}

class page 
{
	var $content;
	var $head;
	var $title;
	
	function add($text) 
	{
		$this->content.=$text;
	}
	
	function head($text)
	{
		$this->head=$text;
	}
	function title($title)
	{
		$this->title=$title;	
	}
	
	function go()
	{
	 	global $file;
		$html = $file->read('html/standard.phtml');
		$html = replace($html);
		echo $html;
	}
	
	function replace($text) 
	{
		$text = str_replace("{CONTENT}",$this->content,$text);
		$text = str_replace("{TITLE}",$this->title,$text);
		$text = str_replace("{HEAD}",$this->head,$text);
		$text = str_replace("{MENU}",$this->menu(),$text);
		$text = str_replace("{NAME}",$config->name_school,$text);
		return($text);
	}

	function specialpage($page)
	{
	 	global $file;
		switch($page) 
		{
			case('login-student'):
				$this->title = 'Login';
				$this->head($file->read('html/login-student-head.phtml'));
				$this->add($file->read('html/login-student.phtml'));
			break;
			case('login-prof'):
				$this->title = 'Login Prof';
				$this->head($file->read('html/login-prof-head.phtml'));
				$this->add($file->read('html/login-prof.phtml'));
			break;
		}
	}

}

?>

In windows the crash is:

"Si ? verificato un errore in Apache.exe. L'applicazione verr? chiusa."
equal to
"An error occurred in Apache.exe. The application will be closed."

on linux I don't know the crash but 
"The page cannot be displayed"
to all other pages.

on 3? line there isn't "exit"... Error on copy-past

Thank you for this bug report. To properly diagnose the problem, we
need a backtrace to see what is happening behind the scenes. To
find out how to generate a backtrace, please read
http://bugs.php.net/bugs-generating-backtrace.php for *NIX and
http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32

Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open". Thank you for helping
us make PHP better.

No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".