__halt_compiler

(PHP 5)

__halt_compiler — Beendet die Kompilerausführung

Beschreibung

void __halt_compiler ( void )

Beendet die Kompilerausführung. Dies kann sinnvoll sein, wenn Daten in PHP-Skripte eingebettet sind, wie z.B. in Installationsdateien.

Die Byteposition, an der die Daten beginnen, kann über die Konstante __COMPILER_HALT_OFFSET__ ermittelt werden, die nur definiert ist, wenn die Funktion __halt_compiler() in der Datei benutzt wird.

Rückgabewerte

Es wird kein Wert zurückgegeben.

Beispiele

Beispiel #1 Ein __halt_compiler()-Beispiel


<?php

// Datei öffnen
$fp = fopen(__FILE__, 'r');

// Auf den Anfang der Daten positionieren
fseek($fp, __COMPILER_HALT_OFFSET__);

// und diese ausgeben
var_dump(stream_get_contents($fp));

// hier Kompilation beendenn
__halt_compiler(); ab hier die eigentlichen Daten (z.B. tar, gz, PHP, etc.)

Anmerkungen

Hinweis: __halt_compiler() kann nur auf der höchsten Ausführungsebene und nicht innerhalb anderer Funktionen oder Methoden benutzt werden.

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Last updated: Fri, 30 Oct 2009

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__halt_compiler

Ultimater at gmail dot com
14-May-2009 01:36


Another possible usage, in addition to binary data and installers,

is using it to separate model, view and controller logic from one another:



<?php

class viewhelper{function render(){

eval(file_get_contents(__FILE__,null,null,__COMPILER_HALT_OFFSET__));

}}



//database logic goes here

$row=array(

'loggedin'=>true,

'modcp'=>true,

'admincp'=>false,

'username'=>'Ultimater',

'userid'=>1234

);

//database logic goes here



//controller logic goes here

$view=new viewhelper;

$view->title="Test -> Ultimater's MVC example";

$view->base="http://".$_SERVER['HTTP_HOST'];

$view->username=$row['username'];

$view->userid=$row['userid'];

$view->authbar->loggedin=$row['loggedin'];

$view->authbar->modcp=$row['modcp'];

$view->authbar->admincp=$row['admincp'];

$view->render();

//controller logic goes here



__halt_compiler();?>

<!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-Type" content="text/html; charset=utf-8" />

<title><?=htmlentities($this->title)?></title>

<style type="text/css">

a{color:#3333ff;text-decoration:none;}

a:hover{color:#0380fc;}

</style>

</head>

<body>

<?php

if($this->authbar->loggedin){

?>

<table><tr>

<td>Hello <a href="<?=$this->base?>/showuser.php?id=<?=$this->userid?>

"><?=htmlentities($this->username)?></a></td><td>[</td>

<td><a href="<?=$this->base?>/logout.php">Log Out</a></td>

<th><a href="<?=$this->base?>/usercp.php">UserCP</a></th>

<? if($this->authbar->modcp){ ?>

<td>&middot;</td><th><a href="<?=$this->base?>/modcp.php">ModCP</a></th>

<? } ?>

<? if($this->authbar->admincp){ ?>

<td>&middot;</td><th><a href="<?=$this->base?>/admincp.php">AdminCP</a></th>

<? } ?>

<td>]</td>

</tr></table>

<?php

}else{

?>

<table><tr><td>Hello Guest</td><td>[</td>

<td><a href="<?=$this->base?>/login.php">Log In</a></td>

<th><a href="<?=$this->base?>/register.php">Register</a></th>

<td>]</td></tr></table>

<? } ?>

</body>

</html>

gn_shallyNOSPAM at yahoo dot com
04-Jun-2008 02:56


actually, __halt_compiler did something, even in eval function, that things is set the constant __COMPILER_HALT_OFFSET__ to the right value



as all of you might know, PHP will change content of some magic constant like __FUNCTION__, __CLASS__, etc based on the situation. so do the __COMPILER_HALT_OFFSET__ constant, is a file specific constant, just like the __FILE__ constant, the content will be changed based on wich file the __halt_compiler() reside.



try this:



/**** whatever.php ****/

<?php

eval('echo __FILE__."(".__COMPILER_HALT_OFFSET__.")\n"; __halt_compiler();');

echo __FILE__."(".__COMPILER_HALT_OFFSET__.")\n"; __halt_compiler();



if (!isset($whatever))

{

  $whatever = 'whatever';

  include __FILE__;

}

__halt_compiler();whatever

zsh
12-Oct-2007 11:11


__halt_compiler() is a language construct and therefore cannot be used as a variable function.



Also, it cannot be used in eval() -- it won't throw a syntax error, but it won't do anything either.

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Last updated: Fri, 30 Oct 2009