Mieux "Cacher" (memcache, APC)

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ViPHP
ViPHP | 4030 Messages

14 avr. 2008, 15:04

Introduction:
Ca veux dire quoi, mieux cacher ? Outre les systèmes de cache d'opcode (exposé sur quelques méchanismes de cache) et des systèmes "faits main", tous se résument à garder une copie générée d'une page, pour éviter de refaire un calcul ultérieur. C'est bien, mais il y a mieux. Que se passe-t-il si chaque utilisateur a une page presque unique ? Non pas que les données sont uniques, mais que leur rassemblement, leur représentation l'est.

Il en résulte une page unique, non réutilisable, bien que les données, prises séparément, sont les résultats de requêtes identiques à travers des milliers de pages. N'est-il pas alors mieux de ne mettre que le résultat de la requête dans le cache ? Ou le résultat d'un (long, fastidieux et infini) calcul, voir un tableau, un objet ? Stockés dans la mémoire vive du serveur, les scripts php n'auront qu'a réunir les données et les afficher, quasi sans délai.

Je présente ici deux méthodes. Une "lourde" (memcache, utilisée par des sites aux dimensions gargentuesques (Youtube, Wikipedia, SourceForge, Facebook, Digg, etc..), et une plus "légère" (APC, ou Alternative PHP Cache), intégrée à php, et plus facile pour des sites plus réduits (l'immense majorité).

Petite remarque, ce petit guide est prévu pour server2003/IIS6. Mais en termes de fonctionnalité, c'est pareil. De plus, il ne s'agit pas ici d'une large présentation, mais plutôt une légère introduction. A vous de vous approfondir, si la matière vous intéresse.

MemCache:
c'est quoi memcache ? Pour reprendre la définition de php.net:
[Memcache est] un démon fortement efficace dans la gestion du cache, qui est principalement destiné à faire baisser la charge des bases de données dans les applications web dynamiques.
En gros, c'est un système de cache hyper-efficace, souvent utilisé pour éviter des accès à une base de données, dont les temps d'accès sont de toute façon plus lents qu'un accès direct à la mémoire vive (la ou memcache stocke ses données). C'est un grosse application, son utilisation pour un simple blog est extrêmement limité, mais pour une application web ou les accès DB font légion et dont la charge doit être partagée sur plusieur serveurs, il peut être utile de les stocker; les résultats des requêtes ou tout autre objet php.

Voici un petit parcours guidé vers son installation sous windows (pour ma part, windows 2003/IIS6).

Etapes:
  1. installer le service memcache
  2. installer l'extension php_memcache.dll
  3. tester.
  1. Memcache
    D'abord, obtenir le portage win32 de memcache: memcached 1.2.1 for Win32 binaries
    (source: http://jehiah.cz/projects/memcached-win32/)
    1. Désarchiver ou vous voulez (ex c:\memcache)
    2. Installer le service avec la commande 'c:\memcache\memcached.exe -d install' depuis la ligne de commande.
    3. Démarrer le service, soit depuis services.mdc, soit depuis la ligne de commande 'c:\memcach\memcached.exe -d start'
    4. C'est prêt. Normallement, le serveur est à l'écoute sur le port 11211.
  2. extension php
    Tout d'abord, le dll pour votre version php, disponible ici.
    (source : http://pecl4win.php.net/)

    Copiez-le dans votre répertoire extensions (c:\php5\ext , par exemple).
    Modifiez votre php.ini (dans le repertoire c:\windows, si vous utilisez php5 en isapi)
    Ajoutez cette ligne a la liste des extensions: 'extension=php_memcache.dll'
    Relancez IIS.
  3. tester
    Avec ce petit script, par exemple:
    <?php
    $memcache = memcache_connect('localhost', 11211);
    
    if ($memcache) 
    	{
    	/* On commence par insérer tout dans le cache.. */
    	// une chaîne..
    	$memcache->set("str_key", "Chaine a enregistrer dans memcache.");
    	// des chiffres..
    	$memcache->set("num_key", 123);
    	// un tableau..
    	$memcache->set("arr_key", array(
                       "voiture" => "portière",
                       "maison"  => array("fenetre","porte")
                        )); 
      // un objet..
    	$object = new StdClass;
    	$object->attribute = 'mon si bel objet';
    	$memcache->set("obj_key", $object);
    
      /* Et on affiche ! */
    	echo $memcache->get('str_key')."<br/>";
    	echo $memcache->get('num_key')."<br/>";;
    	print_r ($memcache->get('arr_key'));
    	echo "<br />";
    	var_dump($memcache->get('obj_key'));
    	}
    else 
    	{
    	/* ah non, y'a pas de système de cache..*/
    	echo "memcache absent.";
    	}
    ?>
    Et théoriquement, ça devrait marcher.
Voilà, c'est fait.
Voici le lien vers le manual memcache de php.net, ou se trouvent les méthodes ainsi que quelques applications (cache de sessions ?) pour memcache:
http://dk2.php.net/manual/fr/ref.memcache.php


Alternative PHP cache:

APC cache est avant tout un cache d'opcode. Cependant, quelques fonctionnalités d'APC permettent de mettre en cache des variables tout comme avec Memcache. L'installation est également plus simple, puisqu'il s'agit d'un module PHP.
  1. télécharger
  2. configurer
  3. tester.
  1. télécharger
    Pour les utilisateur windows:
    http://pecl4win.php.net/ext.php/php_apc.dll
  2. configurer
    Il faut ensuite éditer le php.ini. Dans mon cas, j'ai désactive la mise en cache des pages en spécifiant "apc.cache_by_default = 0". Il y a plusieurs paramètres à prendre en compte, et je vous invite à consulter les paramètres de configuration (lien) pour éviter de faire de mauvais choix.

    Voici en tout cas une proposition par défaut:

    Code : Tout sélectionner

    [PHP APC] apc.enabled = 1 apc.shm_segments = 1 apc.shm_size = 30 apc.optimization = 0 apc.num_files_hint = 1000 apc.user_entries_hint = 4096 apc.ttl = 0 apc.user_ttl = 0 apc.gc_ttl = 3600 apc.cache_by_default = 0 apc.filters = NULL apc.mmap_file_mask = NULL apc.slam_defense = 0 apc.file_update_protection = 2 apc.enable_cli = 0 apc.max_file_size = 1M apc.stat = 1 apc.write_lock = 1 apc.report_autofilter = 0 apc.include_once_override = 0 apc.rfc1867 = 0 apc.rfc1867_prefix = "upload_" apc.rfc1867_name = APC_UPLOAD_PROGRESS apc.rfc1867_freq = 0 apc.localcache = 0 apc.localcache.size = 512
    IL suffit de redémarrer le serveur, et c'est censé fonctionner.
  3. tester
    En modifiant le précédent script de test:
    if (apc_cache_info()) 
    	{
    	apc_add("str_key", "Chaine a enregistrer dans APC.");
    	apc_add("num_key", 123);
    	apc_add("arr_key", array(
                       "voiture" => "portière",
                       "maison"  => array("fenetre","porte")
                        ));
    
    	$object = new StdClass;
    	$object->attribute = 'mon si bel objet';
    	apc_add("obj_key", $object);
    
    	echo apc_fetch('str_key')."<br/>";
    	echo apc_fetch('num_key')."<br/>";;
    	print_r (apc_fetch('arr_key'));
    	echo "<br />";
    	var_dump(apc_fetch('obj_key'));
    	}
    else 
    	{
    	echo "APC absent.";
    	}
    
    Et c'est fait !
Ceci n'est qu'une approche très superficielle du sujet, mais j'espère, avec cette brève introduction, avoir suscité un leger intérêt pour ces systèmes de cache, utilisables environ partout.

B.
Mais qu'importe. (je suis ici - dernier petit projet)
Berze going social.

ViPHP
ViPHP | 4030 Messages

15 avr. 2008, 10:37

Remarque pour APC

Comme Cyrano me l'a gentillement fait remarquer, il existe pour APC, livré avec le code source du package PECL (http://pecl.php.net/package/apc) , un petit script extrêmement pratique, un "tableau de bord" avec une foule de données sur l'emploi du cache, son contenu, et des statistiques, et même une interface de gestion (un véritable GUI quoi..). Bref, quelque chôse de fort utile.

N'ayant pas tout de suite vu l'interêt de la chôse, je l'ais volontairement omise. Maintenant, c'est corrigé. Et pour vous éviter de vous fatiguer à télécharger le package et a en sortir le script, voici sa source (qu'il suffit de coller dans un fichier, le mettre quelque part, et l'appeler):

apc.php:
<?php
/*
  +----------------------------------------------------------------------+
  | APC                                                                  |
  +----------------------------------------------------------------------+
  | Copyright (c) 2006 The PHP Group                                     |
  +----------------------------------------------------------------------+
  | This source file is subject to version 3.01 of the PHP license,      |
  | that is bundled with this package in the file LICENSE, and is        |
  | available through the world-wide-web at the following url:           |
  | http://www.php.net/license/3_01.txt                                  |
  | If you did not receive a copy of the PHP license and are unable to   |
  | obtain it through the world-wide-web, please send a note to          |
  | license@php.net so we can mail you a copy immediately.               |
  +----------------------------------------------------------------------+
  | Authors: Ralf Becker <beckerr@php.net>                               |
  |          Rasmus Lerdorf <rasmus@php.net>                             |
  |          Ilia Alshanetsky <ilia@prohost.org>                         |
  +----------------------------------------------------------------------+

   All other licensing and usage conditions are those of the PHP Group.

 */

$VERSION='$Id: apc.php,v 3.68.2.1 2008/03/25 18:04:53 gopalv Exp $';

////////// READ OPTIONAL CONFIGURATION FILE ////////////
if (file_exists("apc.conf.php")) include("apc.conf.php");
////////////////////////////////////////////////////////

////////// BEGIN OF DEFAULT CONFIG AREA ///////////////////////////////////////////////////////////

defaults('USE_AUTHENTICATION',1);			// Use (internal) authentication - best choice if 
											// no other authentication is available
											// If set to 0:
											//  There will be no further authentication. You 
											//  will have to handle this by yourself!
											// If set to 1:
											//  You need to change ADMIN_PASSWORD to make
											//  this work!
defaults('ADMIN_USERNAME','apc'); 			// Admin Username
defaults('ADMIN_PASSWORD','password');  	// Admin Password - CHANGE THIS TO ENABLE!!!

// (beckerr) I'm using a clear text password here, because I've no good idea how to let 
//           users generate a md5 or crypt password in a easy way to fill it in above

//defaults('DATE_FORMAT', "d.m.Y H:i:s");	// German
defaults('DATE_FORMAT', 'Y/m/d H:i:s'); 	// US

defaults('GRAPH_SIZE',200);					// Image size

////////// END OF DEFAULT CONFIG AREA /////////////////////////////////////////////////////////////


// "define if not defined"
function defaults($d,$v) {
	if (!defined($d)) define($d,$v); // or just @define(...)
}

// rewrite $PHP_SELF to block XSS attacks
//
$PHP_SELF= isset($_SERVER['PHP_SELF']) ? htmlentities(strip_tags($_SERVER['PHP_SELF'],''), ENT_QUOTES) : '';
$time = time();
$host = getenv('HOSTNAME');
if($host) { $host = '('.$host.')'; }

// operation constants
define('OB_HOST_STATS',1);
define('OB_SYS_CACHE',2);
define('OB_USER_CACHE',3);
define('OB_SYS_CACHE_DIR',4);
define('OB_VERSION_CHECK',9);

// check validity of input variables
$vardom=array(
	'OB'	=> '/^\d+$/',			// operational mode switch
	'CC'	=> '/^[01]$/',			// clear cache requested
	'DU'	=> '/^.*$/',			// Delete User Key
	'SH'	=> '/^[a-z0-9]+$/',		// shared object description

	'IMG'	=> '/^[123]$/',			// image to generate
	'LO'	=> '/^1$/',				// login requested

	'COUNT'	=> '/^\d+$/',			// number of line displayed in list
	'SCOPE'	=> '/^[AD]$/',			// list view scope
	'SORT1'	=> '/^[AHSMCDTZ]$/',	// first sort key
	'SORT2'	=> '/^[DA]$/',			// second sort key
	'AGGR'	=> '/^\d+$/',			// aggregation by dir level
	'SEARCH'	=> '~^[a-zA-Z0-1/_.-]*$~'			// aggregation by dir level
);

// default cache mode
$cache_mode='opcode';

// cache scope
$scope_list=array(
	'A' => 'cache_list',
	'D' => 'deleted_list'
);

// handle POST and GET requests
if (empty($_REQUEST)) {
	if (!empty($_GET) && !empty($_POST)) {
		$_REQUEST = array_merge($_GET, $_POST);
	} else if (!empty($_GET)) {
		$_REQUEST = $_GET;
	} else if (!empty($_POST)) {
		$_REQUEST = $_POST;
	} else {
		$_REQUEST = array();
	}
}

// check parameter syntax
foreach($vardom as $var => $dom) {
	if (!isset($_REQUEST[$var])) {
		$MYREQUEST[$var]=NULL;
	} else if (!is_array($_REQUEST[$var]) && preg_match($dom.'D',$_REQUEST[$var])) {
		$MYREQUEST[$var]=$_REQUEST[$var];
	} else {
		$MYREQUEST[$var]=$_REQUEST[$var]=NULL;
	}
}

// check parameter sematics
if (empty($MYREQUEST['SCOPE'])) $MYREQUEST['SCOPE']="A";
if (empty($MYREQUEST['SORT1'])) $MYREQUEST['SORT1']="H";
if (empty($MYREQUEST['SORT2'])) $MYREQUEST['SORT2']="D";
if (empty($MYREQUEST['OB']))	$MYREQUEST['OB']=OB_HOST_STATS;
if (!isset($MYREQUEST['COUNT'])) $MYREQUEST['COUNT']=20;
if (!isset($scope_list[$MYREQUEST['SCOPE']])) $MYREQUEST['SCOPE']='A';

$MY_SELF=
	"$PHP_SELF".
	"?SCOPE=".$MYREQUEST['SCOPE'].
	"&SORT1=".$MYREQUEST['SORT1'].
	"&SORT2=".$MYREQUEST['SORT2'].
	"&COUNT=".$MYREQUEST['COUNT'];
$MY_SELF_WO_SORT=
	"$PHP_SELF".
	"?SCOPE=".$MYREQUEST['SCOPE'].
	"&COUNT=".$MYREQUEST['COUNT'];

// authentication needed?
//
if (!USE_AUTHENTICATION) {
	$AUTHENTICATED=1;
} else {
	$AUTHENTICATED=0;
	if (ADMIN_PASSWORD!='password' && ($MYREQUEST['LO'] == 1 || isset($_SERVER['PHP_AUTH_USER']))) {

		if (!isset($_SERVER['PHP_AUTH_USER']) ||
			!isset($_SERVER['PHP_AUTH_PW']) ||
			$_SERVER['PHP_AUTH_USER'] != ADMIN_USERNAME ||
			$_SERVER['PHP_AUTH_PW'] != ADMIN_PASSWORD) {
			Header("WWW-Authenticate: Basic realm=\"APC Login\"");
			Header("HTTP/1.0 401 Unauthorized");

			echo <<<EOB
				<html><body>
				<h1>Rejected!</h1>
				<big>Wrong Username or Password!</big><br/>&nbsp;<br/>&nbsp;
				<big><a href='$PHP_SELF?OB={$MYREQUEST['OB']}'>Continue...</a></big>
				</body></html>
EOB;
			exit;
			
		} else {
			$AUTHENTICATED=1;
		}
	}
}
	
// select cache mode
if ($AUTHENTICATED && $MYREQUEST['OB'] == OB_USER_CACHE) {
	$cache_mode='user';
}
// clear cache
if ($AUTHENTICATED && isset($MYREQUEST['CC']) && $MYREQUEST['CC']) {
	apc_clear_cache($cache_mode);
}

if ($AUTHENTICATED && !empty($MYREQUEST['DU'])) {
	apc_delete($MYREQUEST['DU']);
}

if(!function_exists('apc_cache_info') || !($cache=@apc_cache_info($cache_mode))) {
	echo "No cache info available.  APC does not appear to be running.";
  exit;
}

$cache_user = apc_cache_info('user', 1);  
$mem=apc_sma_info();
if(!$cache['num_hits']) { $cache['num_hits']=1; $time++; }  // Avoid division by 0 errors on a cache clear

// don't cache this page
//
header("Cache-Control: no-store, no-cache, must-revalidate");  // HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");                                    // HTTP/1.0

function duration($ts) {
    global $time;
    $years = (int)((($time - $ts)/(7*86400))/52.177457);
    $rem = (int)(($time-$ts)-($years * 52.177457 * 7 * 86400));
    $weeks = (int)(($rem)/(7*86400));
    $days = (int)(($rem)/86400) - $weeks*7;
    $hours = (int)(($rem)/3600) - $days*24 - $weeks*7*24;
    $mins = (int)(($rem)/60) - $hours*60 - $days*24*60 - $weeks*7*24*60;
    $str = '';
    if($years==1) $str .= "$years year, ";
    if($years>1) $str .= "$years years, ";
    if($weeks==1) $str .= "$weeks week, ";
    if($weeks>1) $str .= "$weeks weeks, ";
    if($days==1) $str .= "$days day,";
    if($days>1) $str .= "$days days,";
    if($hours == 1) $str .= " $hours hour and";
    if($hours>1) $str .= " $hours hours and";
    if($mins == 1) $str .= " 1 minute";
    else $str .= " $mins minutes";
    return $str;
}

// create graphics
//
function graphics_avail() {
	return extension_loaded('gd');
}
if (isset($MYREQUEST['IMG']))
{
	if (!graphics_avail()) {
		exit(0);
	}

	function fill_arc($im, $centerX, $centerY, $diameter, $start, $end, $color1,$color2,$text='',$placeindex=0) {
		$r=$diameter/2;
		$w=deg2rad((360+$start+($end-$start)/2)%360);

		
		if (function_exists("imagefilledarc")) {
			// exists only if GD 2.0.1 is avaliable
			imagefilledarc($im, $centerX+1, $centerY+1, $diameter, $diameter, $start, $end, $color1, IMG_ARC_PIE);
			imagefilledarc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color2, IMG_ARC_PIE);
			imagefilledarc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color1, IMG_ARC_NOFILL|IMG_ARC_EDGED);
		} else {
			imagearc($im, $centerX, $centerY, $diameter, $diameter, $start, $end, $color2);
			imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($start)) * $r, $centerY + sin(deg2rad($start)) * $r, $color2);
			imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($start+1)) * $r, $centerY + sin(deg2rad($start)) * $r, $color2);
			imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($end-1))   * $r, $centerY + sin(deg2rad($end))   * $r, $color2);
			imageline($im, $centerX, $centerY, $centerX + cos(deg2rad($end))   * $r, $centerY + sin(deg2rad($end))   * $r, $color2);
			imagefill($im,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2, $color2);
		}
		if ($text) {
			if ($placeindex>0) {
				imageline($im,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2,$diameter, $placeindex*12,$color1);
				imagestring($im,4,$diameter, $placeindex*12,$text,$color1);	
				
			} else {
				imagestring($im,4,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2,$text,$color1);
			}
		}
	} 

	function text_arc($im, $centerX, $centerY, $diameter, $start, $end, $color1,$text,$placeindex=0) {
		$r=$diameter/2;
		$w=deg2rad((360+$start+($end-$start)/2)%360);

		if ($placeindex>0) {
			imageline($im,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2,$diameter, $placeindex*12,$color1);
			imagestring($im,4,$diameter, $placeindex*12,$text,$color1);	
				
		} else {
			imagestring($im,4,$centerX + $r*cos($w)/2, $centerY + $r*sin($w)/2,$text,$color1);
		}
	} 
	
	function fill_box($im, $x, $y, $w, $h, $color1, $color2,$text='',$placeindex='') {
		global $col_black;
		$x1=$x+$w-1;
		$y1=$y+$h-1;

		imagerectangle($im, $x, $y1, $x1+1, $y+1, $col_black);
		if($y1>$y) imagefilledrectangle($im, $x, $y, $x1, $y1, $color2);
		else imagefilledrectangle($im, $x, $y1, $x1, $y, $color2);
		imagerectangle($im, $x, $y1, $x1, $y, $color1);
		if ($text) {
			if ($placeindex>0) {
			
				if ($placeindex<16)
				{
					$px=5;
					$py=$placeindex*12+6;
					imagefilledrectangle($im, $px+90, $py+3, $px+90-4, $py-3, $color2);
					imageline($im,$x,$y+$h/2,$px+90,$py,$color2);
					imagestring($im,2,$px,$py-6,$text,$color1);	
					
				} else {
					if ($placeindex<31) {
						$px=$x+40*2;
						$py=($placeindex-15)*12+6;
					} else {
						$px=$x+40*2+100*intval(($placeindex-15)/15);
						$py=($placeindex%15)*12+6;
					}
					imagefilledrectangle($im, $px, $py+3, $px-4, $py-3, $color2);
					imageline($im,$x+$w,$y+$h/2,$px,$py,$color2);
					imagestring($im,2,$px+2,$py-6,$text,$color1);	
				}
			} else {
				imagestring($im,4,$x+5,$y1-16,$text,$color1);
			}
		}
	}


	$size = GRAPH_SIZE; // image size
	if ($MYREQUEST['IMG']==3)
		$image = imagecreate(2*$size+150, $size+10);
	else
		$image = imagecreate($size+50, $size+10);

	$col_white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
	$col_red   = imagecolorallocate($image, 0xD0, 0x60,  0x30);
	$col_green = imagecolorallocate($image, 0x60, 0xF0, 0x60);
	$col_black = imagecolorallocate($image,   0,   0,   0);
	imagecolortransparent($image,$col_white);

	switch ($MYREQUEST['IMG']) {
	
	case 1:
		$s=$mem['num_seg']*$mem['seg_size'];
		$a=$mem['avail_mem'];
		$x=$y=$size/2;
		$fuzz = 0.000001;

		// This block of code creates the pie chart.  It is a lot more complex than you
		// would expect because we try to visualize any memory fragmentation as well.
		$angle_from = 0;
		$string_placement=array();
		for($i=0; $i<$mem['num_seg']; $i++) {	
			$ptr = 0;
			$free = $mem['block_lists'][$i];
			foreach($free as $block) {
				if($block['offset']!=$ptr) {       // Used block
					$angle_to = $angle_from+($block['offset']-$ptr)/$s;
					if(($angle_to+$fuzz)>1) $angle_to = 1;
					if( ($angle_to*360) - ($angle_from*360) >= 1) {
						fill_arc($image,$x,$y,$size,$angle_from*360,$angle_to*360,$col_black,$col_red);
						if (($angle_to-$angle_from)>0.05) {
							array_push($string_placement, array($angle_from,$angle_to));
						}
					}
					$angle_from = $angle_to;
				}
				$angle_to = $angle_from+($block['size'])/$s;
				if(($angle_to+$fuzz)>1) $angle_to = 1;
				if( ($angle_to*360) - ($angle_from*360) >= 1) {
					fill_arc($image,$x,$y,$size,$angle_from*360,$angle_to*360,$col_black,$col_green);
					if (($angle_to-$angle_from)>0.05) {
						array_push($string_placement, array($angle_from,$angle_to));
					}
				}
				$angle_from = $angle_to;
				$ptr = $block['offset']+$block['size'];
			}
			if ($ptr < $mem['seg_size']) { // memory at the end 
				$angle_to = $angle_from + ($mem['seg_size'] - $ptr)/$s;
				if(($angle_to+$fuzz)>1) $angle_to = 1;
				fill_arc($image,$x,$y,$size,$angle_from*360,$angle_to*360,$col_black,$col_red);
				if (($angle_to-$angle_from)>0.05) {
					array_push($string_placement, array($angle_from,$angle_to));
				}
			}
		}
		foreach ($string_placement as $angle) {
			text_arc($image,$x,$y,$size,$angle[0]*360,$angle[1]*360,$col_black,bsize($s*($angle[1]-$angle[0])));
		}
		break;
		
	case 2: 
		$s=$cache['num_hits']+$cache['num_misses'];
		$a=$cache['num_hits'];
		
		fill_box($image, 30,$size,50,-$a*($size-21)/$s,$col_black,$col_green,sprintf("%.1f%%",$cache['num_hits']*100/$s));
		fill_box($image,130,$size,50,-max(4,($s-$a)*($size-21)/$s),$col_black,$col_red,sprintf("%.1f%%",$cache['num_misses']*100/$s));
		break;
		
	case 3:
		$s=$mem['num_seg']*$mem['seg_size'];
		$a=$mem['avail_mem'];
		$x=130;
		$y=1;
		$j=1;

		// This block of code creates the bar chart.  It is a lot more complex than you
		// would expect because we try to visualize any memory fragmentation as well.
		for($i=0; $i<$mem['num_seg']; $i++) {	
			$ptr = 0;
			$free = $mem['block_lists'][$i];
			foreach($free as $block) {
				if($block['offset']!=$ptr) {       // Used block
					$h=(GRAPH_SIZE-5)*($block['offset']-$ptr)/$s;
					if ($h>0) {
                                                $j++;
						if($j<75) fill_box($image,$x,$y,50,$h,$col_black,$col_red,bsize($block['offset']-$ptr),$j);
                                                else fill_box($image,$x,$y,50,$h,$col_black,$col_red);
                                        }
					$y+=$h;
				}
				$h=(GRAPH_SIZE-5)*($block['size'])/$s;
				if ($h>0) {
                                        $j++;
					if($j<75) fill_box($image,$x,$y,50,$h,$col_black,$col_green,bsize($block['size']),$j);
					else fill_box($image,$x,$y,50,$h,$col_black,$col_green);
                                }
				$y+=$h;
				$ptr = $block['offset']+$block['size'];
			}
			if ($ptr < $mem['seg_size']) { // memory at the end 
				$h = (GRAPH_SIZE-5) * ($mem['seg_size'] - $ptr) / $s;
				if ($h > 0) {
					fill_box($image,$x,$y,50,$h,$col_black,$col_red,bsize($mem['seg_size']-$ptr),$j++);
				}
			}
		}
		break;
	case 4: 
		$s=$cache['num_hits']+$cache['num_misses'];
		$a=$cache['num_hits'];
	        	
		fill_box($image, 30,$size,50,-$a*($size-21)/$s,$col_black,$col_green,sprintf("%.1f%%",$cache['num_hits']*100/$s));
		fill_box($image,130,$size,50,-max(4,($s-$a)*($size-21)/$s),$col_black,$col_red,sprintf("%.1f%%",$cache['num_misses']*100/$s));
		break;
	
	}
	header("Content-type: image/png");
	imagepng($image);
	exit;
}

// pretty printer for byte values
//
function bsize($s) {
	foreach (array('','K','M','G') as $i => $k) {
		if ($s < 1024) break;
		$s/=1024;
	}
	return sprintf("%5.1f %sBytes",$s,$k);
}

// sortable table header in "scripts for this host" view
function sortheader($key,$name,$extra='') {
	global $MYREQUEST, $MY_SELF_WO_SORT;
	
	if ($MYREQUEST['SORT1']==$key) {
		$MYREQUEST['SORT2'] = $MYREQUEST['SORT2']=='A' ? 'D' : 'A';
	}
	return "<a class=sortable href=\"$MY_SELF_WO_SORT$extra&SORT1=$key&SORT2=".$MYREQUEST['SORT2']."\">$name</a>";

}

// create menu entry 
function menu_entry($ob,$title) {
	global $MYREQUEST,$MY_SELF;
	if ($MYREQUEST['OB']!=$ob) {
		return "<li><a href=\"$MY_SELF&OB=$ob\">$title</a></li>";
	} else if (empty($MYREQUEST['SH'])) {
		return "<li><span class=active>$title</span></li>";
	} else {
		return "<li><a class=\"child_active\" href=\"$MY_SELF&OB=$ob\">$title</a></li>";	
	}
}

function put_login_link($s="Login")
{
	global $MY_SELF,$MYREQUEST,$AUTHENTICATED;
	// needs ADMIN_PASSWORD to be changed!
	//
	if (!USE_AUTHENTICATION) {
		return;
	} else if (ADMIN_PASSWORD=='password')
	{
		print <<<EOB
			<a href="#" onClick="javascript:alert('You need to set a password at the top of apc.php before this will work!');return false";>$s</a>
EOB;
	} else if ($AUTHENTICATED) {
		print <<<EOB
			'{$_SERVER['PHP_AUTH_USER']}'&nbsp;logged&nbsp;in!
EOB;
	} else{
		print <<<EOB
			<a href="$MY_SELF&LO=1&OB={$MYREQUEST['OB']}">$s</a>
EOB;
	}
}


?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head><title>APC INFO <?php echo $host ?></title>
<style><!--
body { background:white; font-size:100.01%; margin:0; padding:0; }
body,p,td,th,input,submit { font-size:0.8em;font-family:arial,helvetica,sans-serif; }
* html body   {font-size:0.8em}
* html p      {font-size:0.8em}
* html td     {font-size:0.8em}
* html th     {font-size:0.8em}
* html input  {font-size:0.8em}
* html submit {font-size:0.8em}
td { vertical-align:top }
a { color:black; font-weight:none; text-decoration:none; }
a:hover { text-decoration:underline; }
div.content { padding:1em 1em 1em 1em; position:absolute; width:97%; z-index:100; }


div.head div.login {
	position:absolute;
	right: 1em;
	top: 1.2em;
	color:white;
	width:6em;
	}
div.head div.login a {
	position:absolute;
	right: 0em;
	background:rgb(119,123,180);
	border:solid rgb(102,102,153) 2px;
	color:white;
	font-weight:bold;
	padding:0.1em 0.5em 0.1em 0.5em;
	text-decoration:none;
	}
div.head div.login a:hover {
	background:rgb(193,193,244);
	}

h1.apc { background:rgb(153,153,204); margin:0; padding:0.5em 1em 0.5em 1em; }
* html h1.apc { margin-bottom:-7px; }
h1.apc a:hover { text-decoration:none; color:rgb(90,90,90); }
h1.apc div.logo span.logo {
	background:rgb(119,123,180);
	color:black;
	border-right: solid black 1px;
	border-bottom: solid black 1px;
	font-style:italic;
	font-size:1em;
	padding-left:1.2em;
	padding-right:1.2em;
	text-align:right;
	}
h1.apc div.logo span.name { color:white; font-size:0.7em; padding:0 0.8em 0 2em; }
h1.apc div.nameinfo { color:white; display:inline; font-size:0.4em; margin-left: 3em; }
h1.apc div.copy { color:black; font-size:0.4em; position:absolute; right:1em; }
hr.apc {
	background:white;
	border-bottom:solid rgb(102,102,153) 1px;
	border-style:none;
	border-top:solid rgb(102,102,153) 10px;
	height:12px;
	margin:0;
	margin-top:1px;
	padding:0;
}

ol,menu { margin:1em 0 0 0; padding:0.2em; margin-left:1em;}
ol.menu li { display:inline; margin-right:0.7em; list-style:none; font-size:85%}
ol.menu a {
	background:rgb(153,153,204);
	border:solid rgb(102,102,153) 2px;
	color:white;
	font-weight:bold;
	margin-right:0em;
	padding:0.1em 0.5em 0.1em 0.5em;
	text-decoration:none;
	margin-left: 5px;
	}
ol.menu a.child_active {
	background:rgb(153,153,204);
	border:solid rgb(102,102,153) 2px;
	color:white;
	font-weight:bold;
	margin-right:0em;
	padding:0.1em 0.5em 0.1em 0.5em;
	text-decoration:none;
	border-left: solid black 5px;
	margin-left: 0px;
	}
ol.menu span.active {
	background:rgb(153,153,204);
	border:solid rgb(102,102,153) 2px;
	color:black;
	font-weight:bold;
	margin-right:0em;
	padding:0.1em 0.5em 0.1em 0.5em;
	text-decoration:none;
	border-left: solid black 5px;
	}
ol.menu span.inactive {
	background:rgb(193,193,244);
	border:solid rgb(182,182,233) 2px;
	color:white;
	font-weight:bold;
	margin-right:0em;
	padding:0.1em 0.5em 0.1em 0.5em;
	text-decoration:none;
	margin-left: 5px;
	}
ol.menu a:hover {
	background:rgb(193,193,244);
	text-decoration:none;
	}
	
	
div.info {
	background:rgb(204,204,204);
	border:solid rgb(204,204,204) 1px;
	margin-bottom:1em;
	}
div.info h2 {
	background:rgb(204,204,204);
	color:black;
	font-size:1em;
	margin:0;
	padding:0.1em 1em 0.1em 1em;
	}
div.info table {
	border:solid rgb(204,204,204) 1px;
	border-spacing:0;
	width:100%;
	}
div.info table th {
	background:rgb(204,204,204);
	color:white;
	margin:0;
	padding:0.1em 1em 0.1em 1em;
	}
div.info table th a.sortable { color:black; }
div.info table tr.tr-0 { background:rgb(238,238,238); }
div.info table tr.tr-1 { background:rgb(221,221,221); }
div.info table td { padding:0.3em 1em 0.3em 1em; }
div.info table td.td-0 { border-right:solid rgb(102,102,153) 1px; white-space:nowrap; }
div.info table td.td-n { border-right:solid rgb(102,102,153) 1px; }
div.info table td h3 {
	color:black;
	font-size:1.1em;
	margin-left:-0.3em;
	}

div.graph { margin-bottom:1em }
div.graph h2 { background:rgb(204,204,204);; color:black; font-size:1em; margin:0; padding:0.1em 1em 0.1em 1em; }
div.graph table { border:solid rgb(204,204,204) 1px; color:black; font-weight:normal; width:100%; }
div.graph table td.td-0 { background:rgb(238,238,238); }
div.graph table td.td-1 { background:rgb(221,221,221); }
div.graph table td { padding:0.2em 1em 0.4em 1em; }

div.div1,div.div2 { margin-bottom:1em; width:35em; }
div.div3 { position:absolute; left:40em; top:1em; width:580px; }
//div.div3 { position:absolute; left:37em; top:1em; right:1em; }

div.sorting { margin:1.5em 0em 1.5em 2em }
.center { text-align:center }
.aright { position:absolute;right:1em }
.right { text-align:right }
.ok { color:rgb(0,200,0); font-weight:bold}
.failed { color:rgb(200,0,0); font-weight:bold}

span.box {
	border: black solid 1px;
	border-right:solid black 2px;
	border-bottom:solid black 2px;
	padding:0 0.5em 0 0.5em;
	margin-right:1em;
}
span.green { background:#60F060; padding:0 0.5em 0 0.5em}
span.red { background:#D06030; padding:0 0.5em 0 0.5em }

div.authneeded {
	background:rgb(238,238,238);
	border:solid rgb(204,204,204) 1px;
	color:rgb(200,0,0);
	font-size:1.2em;
	font-weight:bold;
	padding:2em;
	text-align:center;
	}
	
input {
	background:rgb(153,153,204);
	border:solid rgb(102,102,153) 2px;
	color:white;
	font-weight:bold;
	margin-right:1em;
	padding:0.1em 0.5em 0.1em 0.5em;
	}
//-->
</style>
</head>
<body>
<div class="head">
	<h1 class="apc">
		<div class="logo"><span class="logo"><a href="http://pecl.php.net/package/APC">APC</a></span></div>
		<div class="nameinfo">Opcode Cache</div>
	</h1>
	<div class="login">
	<?php put_login_link(); ?>
	</div>
	<hr class="apc">
</div>
<?php


// Display main Menu
echo <<<EOB
	<ol class=menu>
	<li><a href="$MY_SELF&OB={$MYREQUEST['OB']}&SH={$MYREQUEST['SH']}">Refresh Data</a></li>
EOB;
echo
	menu_entry(1,'View Host Stats'),
	menu_entry(2,'System Cache Entries');
if ($AUTHENTICATED) {
	echo menu_entry(4,'Per-Directory Entries');
}
echo
	menu_entry(3,'User Cache Entries'),
	menu_entry(9,'Version Check');
	
if ($AUTHENTICATED) {
	echo <<<EOB
		<li><a class="aright" href="$MY_SELF&CC=1&OB={$MYREQUEST['OB']}" onClick="javascipt:return confirm('Are you sure?');">Clear $cache_mode Cache</a></li>
EOB;
}
echo <<<EOB
	</ol>
EOB;


// CONTENT
echo <<<EOB
	<div class=content>
EOB;

// MAIN SWITCH STATEMENT 

switch ($MYREQUEST['OB']) {





// -----------------------------------------------
// Host Stats
// -----------------------------------------------
case OB_HOST_STATS:
	$mem_size = $mem['num_seg']*$mem['seg_size'];
	$mem_avail= $mem['avail_mem'];
	$mem_used = $mem_size-$mem_avail;
	$seg_size = bsize($mem['seg_size']);
	$req_rate = sprintf("%.2f",($cache['num_hits']+$cache['num_misses'])/($time-$cache['start_time']));
	$hit_rate = sprintf("%.2f",($cache['num_hits'])/($time-$cache['start_time']));
	$miss_rate = sprintf("%.2f",($cache['num_misses'])/($time-$cache['start_time']));
	$insert_rate = sprintf("%.2f",($cache['num_inserts'])/($time-$cache['start_time']));
	$req_rate_user = sprintf("%.2f",($cache_user['num_hits']+$cache_user['num_misses'])/($time-$cache_user['start_time']));
	$hit_rate_user = sprintf("%.2f",($cache_user['num_hits'])/($time-$cache_user['start_time']));
	$miss_rate_user = sprintf("%.2f",($cache_user['num_misses'])/($time-$cache_user['start_time']));
	$insert_rate_user = sprintf("%.2f",($cache_user['num_inserts'])/($time-$cache_user['start_time']));
	$apcversion = phpversion('apc');
	$phpversion = phpversion();
	$number_files = $cache['num_entries']; 
    $size_files = bsize($cache['mem_size']);
	$number_vars = $cache_user['num_entries'];
    $size_vars = bsize($cache_user['mem_size']);
	$i=0;
	echo <<< EOB
		<div class="info div1"><h2>General Cache Information</h2>
		<table cellspacing=0><tbody>
		<tr class=tr-0><td class=td-0>APC Version</td><td>$apcversion</td></tr>
		<tr class=tr-1><td class=td-0>PHP Version</td><td>$phpversion</td></tr>
EOB;

	if(!empty($_SERVER['SERVER_NAME']))
		echo "<tr class=tr-0><td class=td-0>APC Host</td><td>{$_SERVER['SERVER_NAME']} $host</td></tr>\n";
	if(!empty($_SERVER['SERVER_SOFTWARE']))
		echo "<tr class=tr-1><td class=td-0>Server Software</td><td>{$_SERVER['SERVER_SOFTWARE']}</td></tr>\n";

	echo <<<EOB
		<tr class=tr-0><td class=td-0>Shared Memory</td><td>{$mem['num_seg']} Segment(s) with $seg_size 
    <br/> ({$cache['memory_type']} memory, {$cache['locking_type']} locking)
    </td></tr>
EOB;
	echo   '<tr class=tr-1><td class=td-0>Start Time</td><td>',date(DATE_FORMAT,$cache['start_time']),'</td></tr>';
	echo   '<tr class=tr-0><td class=td-0>Uptime</td><td>',duration($cache['start_time']),'</td></tr>';
	echo   '<tr class=tr-1><td class=td-0>File Upload Support</td><td>',$cache['file_upload_progress'],'</td></tr>';
	echo <<<EOB
		</tbody></table>
		</div>

		<div class="info div1"><h2>File Cache Information</h2>
		<table cellspacing=0><tbody>
		<tr class=tr-0><td class=td-0>Cached Files</td><td>$number_files ($size_files)</td></tr>
		<tr class=tr-1><td class=td-0>Hits</td><td>{$cache['num_hits']}</td></tr>
		<tr class=tr-0><td class=td-0>Misses</td><td>{$cache['num_misses']}</td></tr>
		<tr class=tr-1><td class=td-0>Request Rate (hits, misses)</td><td>$req_rate cache requests/second</td></tr>
		<tr class=tr-0><td class=td-0>Hit Rate</td><td>$hit_rate cache requests/second</td></tr>
		<tr class=tr-1><td class=td-0>Miss Rate</td><td>$miss_rate cache requests/second</td></tr>
		<tr class=tr-0><td class=td-0>Insert Rate</td><td>$insert_rate cache requests/second</td></tr>
		<tr class=tr-1><td class=td-0>Cache full count</td><td>{$cache['expunges']}</td></tr>
		</tbody></table>
		</div>

		<div class="info div1"><h2>User Cache Information</h2>
		<table cellspacing=0><tbody>
    <tr class=tr-0><td class=td-0>Cached Variables</td><td>$number_vars ($size_vars)</td></tr>
		<tr class=tr-1><td class=td-0>Hits</td><td>{$cache_user['num_hits']}</td></tr>
		<tr class=tr-0><td class=td-0>Misses</td><td>{$cache_user['num_misses']}</td></tr>
		<tr class=tr-1><td class=td-0>Request Rate (hits, misses)</td><td>$req_rate_user cache requests/second</td></tr>
		<tr class=tr-0><td class=td-0>Hit Rate</td><td>$hit_rate_user cache requests/second</td></tr>
		<tr class=tr-1><td class=td-0>Miss Rate</td><td>$miss_rate_user cache requests/second</td></tr>
		<tr class=tr-0><td class=td-0>Insert Rate</td><td>$insert_rate_user cache requests/second</td></tr>
		<tr class=tr-1><td class=td-0>Cache full count</td><td>{$cache_user['expunges']}</td></tr>

		</tbody></table>
		</div>

		<div class="info div2"><h2>Runtime Settings</h2><table cellspacing=0><tbody>
EOB;

	$j = 0;
	foreach (ini_get_all('apc') as $k => $v) {
		echo "<tr class=tr-$j><td class=td-0>",$k,"</td><td>",str_replace(',',',<br />',$v['local_value']),"</td></tr>\n";
		$j = 1 - $j;
	}

	if($mem['num_seg']>1 || $mem['num_seg']==1 && count($mem['block_lists'][0])>1)
		$mem_note = "Memory Usage<br /><font size=-2>(multiple slices indicate fragments)</font>";
	else
		$mem_note = "Memory Usage";

	echo <<< EOB
		</tbody></table>
		</div>

		<div class="graph div3"><h2>Host Status Diagrams</h2>
		<table cellspacing=0><tbody>
EOB;
	$size='width='.(GRAPH_SIZE+50).' height='.(GRAPH_SIZE+10);
	echo <<<EOB
		<tr>
		<td class=td-0>$mem_note</td>
		<td class=td-1>Hits & Misses</td>
		</tr>
EOB;

	echo
		graphics_avail() ? 
			  '<tr>'.
			  "<td class=td-0><img alt=\"\" $size src=\"$PHP_SELF?IMG=1&$time\"></td>".
			  "<td class=td-1><img alt=\"\" $size src=\"$PHP_SELF?IMG=2&$time\"></td></tr>\n"
			: "",
		'<tr>',
		'<td class=td-0><span class="green box">&nbsp;</span>Free: ',bsize($mem_avail).sprintf(" (%.1f%%)",$mem_avail*100/$mem_size),"</td>\n",
		'<td class=td-1><span class="green box">&nbsp;</span>Hits: ',$cache['num_hits'].sprintf(" (%.1f%%)",$cache['num_hits']*100/($cache['num_hits']+$cache['num_misses'])),"</td>\n",
		'</tr>',
		'<tr>',
		'<td class=td-0><span class="red box">&nbsp;</span>Used: ',bsize($mem_used ).sprintf(" (%.1f%%)",$mem_used *100/$mem_size),"</td>\n",
		'<td class=td-1><span class="red box">&nbsp;</span>Misses: ',$cache['num_misses'].sprintf(" (%.1f%%)",$cache['num_misses']*100/($cache['num_hits']+$cache['num_misses'])),"</td>\n";
	echo <<< EOB
		</tr>
		</tbody></table>

		<br/>
		<h2>Detailed Memory Usage and Fragmentation</h2>
		<table cellspacing=0><tbody>
		<tr>
		<td class=td-0 colspan=2><br/>
EOB;

	// Fragementation: (freeseg - 1) / total_seg
	$nseg = $freeseg = $fragsize = $freetotal = 0;
	for($i=0; $i<$mem['num_seg']; $i++) {
		$ptr = 0;
		foreach($mem['block_lists'][$i] as $block) {
			if ($block['offset'] != $ptr) {
				++$nseg;
			}
			$ptr = $block['offset'] + $block['size'];
                        /* Only consider blocks <5M for the fragmentation % */
                        if($block['size']<(5*1024*1024)) $fragsize+=$block['size'];
                        $freetotal+=$block['size'];
		}
		$freeseg += count($mem['block_lists'][$i]);
	}
	
	if ($freeseg > 1) {
		$frag = sprintf("%.2f%% (%s out of %s in %d fragments)", ($fragsize/$freetotal)*100,bsize($fragsize),bsize($freetotal),$freeseg);
	} else {
		$frag = "0%";
	}

	if (graphics_avail()) {
		$size='width='.(2*GRAPH_SIZE+150).' height='.(GRAPH_SIZE+10);
		echo <<<EOB
			<img alt="" $size src="$PHP_SELF?IMG=3&$time">
EOB;
	}
	echo <<<EOB
		</br>Fragmentation: $frag
		</td>
		</tr>
EOB;
        if(isset($mem['adist'])) {
          foreach($mem['adist'] as $i=>$v) {
            $cur = pow(2,$i); $nxt = pow(2,$i+1)-1;
            if($i==0) $range = "1";
            else $range = "$cur - $nxt";
            echo "<tr><th align=right>$range</th><td align=right>$v</td></tr>\n";
          }
        }
        echo <<<EOB
		</tbody></table>
		</div>
EOB;
		
	break;


// -----------------------------------------------
// User Cache Entries
// -----------------------------------------------
case OB_USER_CACHE:
	if (!$AUTHENTICATED) {
    echo '<div class="error">You need to login to see the user values here!<br/>&nbsp;<br/>';
		put_login_link("Login now!");
		echo '</div>';
		break;
	}
	$fieldname='info';
	$fieldheading='User Entry Label';
	$fieldkey='info';

// -----------------------------------------------
// System Cache Entries		
// -----------------------------------------------
case OB_SYS_CACHE:	
	if (!isset($fieldname))
	{
		$fieldname='filename';
		$fieldheading='Script Filename';
		if(ini_get("apc.stat")) $fieldkey='inode';
		else $fieldkey='filename'; 
	}
	if (!empty($MYREQUEST['SH']))
	{
		echo <<< EOB
			<div class="info"><table cellspacing=0><tbody>
			<tr><th>Attribute</th><th>Value</th></tr>
EOB;

		$m=0;
		foreach($scope_list as $j => $list) {
			foreach($cache[$list] as $i => $entry) {
				if (md5($entry[$fieldkey])!=$MYREQUEST['SH']) continue;
				foreach($entry as $k => $value) {
					if (!$AUTHENTICATED) {
						// hide all path entries if not logged in
						$value=preg_replace('/^.*(\\/|\\\\)/','<i><hidden></i>/',$value);
					}

					if ($k == "num_hits") {
						$value=sprintf("%s (%.2f%%)",$value,$value*100/$cache['num_hits']);
					}
					if ($k == 'deletion_time') {
						if(!$entry['deletion_time']) $value = "None";
					}
					echo
						"<tr class=tr-$m>",
						"<td class=td-0>",ucwords(preg_replace("/_/"," ",$k)),"</td>",
						"<td class=td-last>",(preg_match("/time/",$k) && $value!='None') ? date(DATE_FORMAT,$value) : $value,"</td>",
						"</tr>";
					$m=1-$m;
				}
				if($fieldkey=='info') {
					echo "<tr class=tr-$m><td class=td-0>Stored Value</td><td class=td-last><pre>";
					$output = var_export(apc_fetch($entry[$fieldkey]),true);
					echo htmlspecialchars($output);
					echo "</pre></td></tr>\n";
				}
				break;
			}
		}

		echo <<<EOB
			</tbody></table>
			</div>
EOB;
		break;
	}

	$cols=6;
	echo <<<EOB
		<div class=sorting><form>Scope:
		<input type=hidden name=OB value={$MYREQUEST['OB']}>
		<select name=SCOPE>
EOB;
	echo 
		"<option value=A",$MYREQUEST['SCOPE']=='A' ? " selected":"",">Active</option>",
		"<option value=D",$MYREQUEST['SCOPE']=='D' ? " selected":"",">Deleted</option>",
		"</select>",
		", Sorting:<select name=SORT1>",
		"<option value=H",$MYREQUEST['SORT1']=='H' ? " selected":"",">Hits</option>",
		"<option value=Z",$MYREQUEST['SORT1']=='Z' ? " selected":"",">Size</option>",
		"<option value=S",$MYREQUEST['SORT1']=='S' ? " selected":"",">$fieldheading</option>",
		"<option value=A",$MYREQUEST['SORT1']=='A' ? " selected":"",">Last accessed</option>",
		"<option value=M",$MYREQUEST['SORT1']=='M' ? " selected":"",">Last modified</option>",
		"<option value=C",$MYREQUEST['SORT1']=='C' ? " selected":"",">Created at</option>",
		"<option value=D",$MYREQUEST['SORT1']=='D' ? " selected":"",">Deleted at</option>";
	if($fieldname=='info') echo
		"<option value=D",$MYREQUEST['SORT1']=='T' ? " selected":"",">Timeout</option>";
	echo 
		'</select>',
		'<select name=SORT2>',
		'<option value=D',$MYREQUEST['SORT2']=='D' ? ' selected':'','>DESC</option>',
		'<option value=A',$MYREQUEST['SORT2']=='A' ? ' selected':'','>ASC</option>',
		'</select>',
		'<select name=COUNT onChange="form.submit()">',
		'<option value=10 ',$MYREQUEST['COUNT']=='10' ? ' selected':'','>Top 10</option>',
		'<option value=20 ',$MYREQUEST['COUNT']=='20' ? ' selected':'','>Top 20</option>',
		'<option value=50 ',$MYREQUEST['COUNT']=='50' ? ' selected':'','>Top 50</option>',
		'<option value=100',$MYREQUEST['COUNT']=='100'? ' selected':'','>Top 100</option>',
		'<option value=150',$MYREQUEST['COUNT']=='150'? ' selected':'','>Top 150</option>',
		'<option value=200',$MYREQUEST['COUNT']=='200'? ' selected':'','>Top 200</option>',
		'<option value=500',$MYREQUEST['COUNT']=='500'? ' selected':'','>Top 500</option>',
		'<option value=0  ',$MYREQUEST['COUNT']=='0'  ? ' selected':'','>All</option>',
		'</select>',
    '&nbsp; Search: <input name=SEARCH value="',$MYREQUEST['SEARCH'],'" type=text size=25/>',
		'&nbsp;<input type=submit value="GO!">',
		'</form></div>';

  if (isset($MYREQUEST['SEARCH'])) {
   // Don't use preg_quote because we want the user to be able to specify a
   // regular expression subpattern.
   $MYREQUEST['SEARCH'] = '/'.str_replace('/', '\\/', $MYREQUEST['SEARCH']).'/i';
   if (preg_match($MYREQUEST['SEARCH'], 'test') === false) {
     echo '<div class="error">Error: enter a valid regular expression as a search query.</div>';
     break;
   }
  }

  echo
		'<div class="info"><table cellspacing=0><tbody>',
		'<tr>',
		'<th>',sortheader('S',$fieldheading,  "&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('H','Hits',         "&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('Z','Size',         "&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('A','Last accessed',"&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('M','Last modified',"&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('C','Created at',   "&OB=".$MYREQUEST['OB']),'</th>';

	if($fieldname=='info') {
		$cols+=2;
		 echo '<th>',sortheader('T','Timeout',"&OB=".$MYREQUEST['OB']),'</th>';
	}
	echo '<th>',sortheader('D','Deleted at',"&OB=".$MYREQUEST['OB']),'</th></tr>';

	// builds list with alpha numeric sortable keys
	//
	$list = array();
	foreach($cache[$scope_list[$MYREQUEST['SCOPE']]] as $i => $entry) {
		switch($MYREQUEST['SORT1']) {
			case 'A': $k=sprintf('%015d-',$entry['access_time']); 	break;
			case 'H': $k=sprintf('%015d-',$entry['num_hits']); 		break;
			case 'Z': $k=sprintf('%015d-',$entry['mem_size']); 		break;
			case 'M': $k=sprintf('%015d-',$entry['mtime']);			break;
			case 'C': $k=sprintf('%015d-',$entry['creation_time']);	break;
			case 'T': $k=sprintf('%015d-',$entry['ttl']);			break;
			case 'D': $k=sprintf('%015d-',$entry['deletion_time']);	break;
			case 'S': $k='';										break;
		}
		if (!$AUTHENTICATED) {
			// hide all path entries if not logged in
			$list[$k.$entry[$fieldname]]=preg_replace('/^.*(\\/|\\\\)/','<i><hidden></i>/',$entry);
		} else {
			$list[$k.$entry[$fieldname]]=$entry;
		}
	}

	if ($list) {
		
		// sort list
		//
		switch ($MYREQUEST['SORT2']) {
			case "A":	krsort($list);	break;
			case "D":	ksort($list);	break;
		}
		
		// output list
		$i=0;
		foreach($list as $k => $entry) {
      if(!$MYREQUEST['SEARCH'] || preg_match($MYREQUEST['SEARCH'], $entry[$fieldname]) != 0) {  
        echo
          '<tr class=tr-',$i%2,'>',
          "<td class=td-0><a href=\"$MY_SELF&OB=",$MYREQUEST['OB'],"&SH=",md5($entry[$fieldkey]),"\">",$entry[$fieldname],'</a></td>',
          '<td class="td-n center">',$entry['num_hits'],'</td>',
          '<td class="td-n right">',$entry['mem_size'],'</td>',
          '<td class="td-n center">',date(DATE_FORMAT,$entry['access_time']),'</td>',
          '<td class="td-n center">',date(DATE_FORMAT,$entry['mtime']),'</td>',
          '<td class="td-n center">',date(DATE_FORMAT,$entry['creation_time']),'</td>';

        if($fieldname=='info') {
          if($entry['ttl'])
            echo '<td class="td-n center">'.$entry['ttl'].' seconds</td>';
          else
            echo '<td class="td-n center">None</td>';
        }
        if ($entry['deletion_time']) {

          echo '<td class="td-last center">', date(DATE_FORMAT,$entry['deletion_time']), '</td>';
        } else if ($MYREQUEST['OB'] == OB_USER_CACHE) {

          echo '<td class="td-last center">';
          echo '[<a href="', $MY_SELF, '&OB=', $MYREQUEST['OB'], '&DU=', urlencode($entry[$fieldkey]), '">Delete Now</a>]';
          echo '</td>';
        } else {
          echo '<td class="td-last center"> &nbsp; </td>';
        }
        echo '</tr>';
        $i++;
        if ($i == $MYREQUEST['COUNT'])
          break;
      }
		}
		
	} else {
		echo '<tr class=tr-0><td class="center" colspan=',$cols,'><i>No data</i></td></tr>';
	}
	echo <<< EOB
		</tbody></table>
EOB;

	if ($list && $i < count($list)) {
		echo "<a href=\"$MY_SELF&OB=",$MYREQUEST['OB'],"&COUNT=0\"><i>",count($list)-$i,' more available...</i></a>';
	}

	echo <<< EOB
		</div>
EOB;
	break;


// -----------------------------------------------
// Per-Directory System Cache Entries
// -----------------------------------------------
case OB_SYS_CACHE_DIR:	
	if (!$AUTHENTICATED) {
		break;
	}

	echo <<<EOB
		<div class=sorting><form>Scope:
		<input type=hidden name=OB value={$MYREQUEST['OB']}>
		<select name=SCOPE>
EOB;
	echo 
		"<option value=A",$MYREQUEST['SCOPE']=='A' ? " selected":"",">Active</option>",
		"<option value=D",$MYREQUEST['SCOPE']=='D' ? " selected":"",">Deleted</option>",
		"</select>",
		", Sorting:<select name=SORT1>",
		"<option value=H",$MYREQUEST['SORT1']=='H' ? " selected":"",">Total Hits</option>",
		"<option value=Z",$MYREQUEST['SORT1']=='Z' ? " selected":"",">Total Size</option>",
		"<option value=T",$MYREQUEST['SORT1']=='T' ? " selected":"",">Number of Files</option>",
		"<option value=S",$MYREQUEST['SORT1']=='S' ? " selected":"",">Directory Name</option>",
		"<option value=A",$MYREQUEST['SORT1']=='A' ? " selected":"",">Avg. Size</option>",
		"<option value=C",$MYREQUEST['SORT1']=='C' ? " selected":"",">Avg. Hits</option>",
		'</select>',
		'<select name=SORT2>',
		'<option value=D',$MYREQUEST['SORT2']=='D' ? ' selected':'','>DESC</option>',
		'<option value=A',$MYREQUEST['SORT2']=='A' ? ' selected':'','>ASC</option>',
		'</select>',
		'<select name=COUNT onChange="form.submit()">',
		'<option value=10 ',$MYREQUEST['COUNT']=='10' ? ' selected':'','>Top 10</option>',
		'<option value=20 ',$MYREQUEST['COUNT']=='20' ? ' selected':'','>Top 20</option>',
		'<option value=50 ',$MYREQUEST['COUNT']=='50' ? ' selected':'','>Top 50</option>',
		'<option value=100',$MYREQUEST['COUNT']=='100'? ' selected':'','>Top 100</option>',
		'<option value=150',$MYREQUEST['COUNT']=='150'? ' selected':'','>Top 150</option>',
		'<option value=200',$MYREQUEST['COUNT']=='200'? ' selected':'','>Top 200</option>',
		'<option value=500',$MYREQUEST['COUNT']=='500'? ' selected':'','>Top 500</option>',
		'<option value=0  ',$MYREQUEST['COUNT']=='0'  ? ' selected':'','>All</option>',
		'</select>',
		", Group By Dir Level:<select name=AGGR>",
		"<option value='' selected>None</option>";
		for ($i = 1; $i < 10; $i++)
			echo "<option value=$i",$MYREQUEST['AGGR']==$i ? " selected":"",">$i</option>";
		echo '</select>',
		'&nbsp;<input type=submit value="GO!">',
		'</form></div>',

		'<div class="info"><table cellspacing=0><tbody>',
		'<tr>',
		'<th>',sortheader('S','Directory Name',	"&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('T','Number of Files',"&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('H','Total Hits',	"&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('Z','Total Size',	"&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('C','Avg. Hits',	"&OB=".$MYREQUEST['OB']),'</th>',
		'<th>',sortheader('A','Avg. Size',	"&OB=".$MYREQUEST['OB']),'</th>',
		'</tr>';

	// builds list with alpha numeric sortable keys
	//
	$tmp = $list = array();
	foreach($cache[$scope_list[$MYREQUEST['SCOPE']]] as $entry) {
		$n = dirname($entry['filename']);
		if ($MYREQUEST['AGGR'] > 0) {
			$n = preg_replace("!^(/?(?:[^/\\\\]+[/\\\\]){".($MYREQUEST['AGGR']-1)."}[^/\\\\]*).*!", "$1", $n);
		}
		if (!isset($tmp[$n])) {
			$tmp[$n] = array('hits'=>0,'size'=>0,'ents'=>0);
		}
		$tmp[$n]['hits'] += $entry['num_hits'];
		$tmp[$n]['size'] += $entry['mem_size'];
		++$tmp[$n]['ents'];
	}

	foreach ($tmp as $k => $v) {
		switch($MYREQUEST['SORT1']) {
			case 'A': $kn=sprintf('%015d-',$v['size'] / $v['ents']);break;
			case 'T': $kn=sprintf('%015d-',$v['ents']);		break;
			case 'H': $kn=sprintf('%015d-',$v['hits']);		break;
			case 'Z': $kn=sprintf('%015d-',$v['size']);		break;
			case 'C': $kn=sprintf('%015d-',$v['hits'] / $v['ents']);break;
			case 'S': $kn = $k;					break;
		}
		$list[$kn.$k] = array($k, $v['ents'], $v['hits'], $v['size']);
	}

	if ($list) {
		
		// sort list
		//
		switch ($MYREQUEST['SORT2']) {
			case "A":	krsort($list);	break;
			case "D":	ksort($list);	break;
		}
		
		// output list
		$i = 0;
		foreach($list as $entry) {
			echo
				'<tr class=tr-',$i%2,'>',
				"<td class=td-0>",$entry[0],'</a></td>',
				'<td class="td-n center">',$entry[1],'</td>',
				'<td class="td-n center">',$entry[2],'</td>',
				'<td class="td-n center">',$entry[3],'</td>',
				'<td class="td-n center">',round($entry[2] / $entry[1]),'</td>',
				'<td class="td-n center">',round($entry[3] / $entry[1]),'</td>',
				'</tr>';

			if (++$i == $MYREQUEST['COUNT']) break;
		}
		
	} else {
		echo '<tr class=tr-0><td class="center" colspan=6><i>No data</i></td></tr>';
	}
	echo <<< EOB
		</tbody></table>
EOB;

	if ($list && $i < count($list)) {
		echo "<a href=\"$MY_SELF&OB=",$MYREQUEST['OB'],"&COUNT=0\"><i>",count($list)-$i,' more available...</i></a>';
	}

	echo <<< EOB
		</div>
EOB;
	break;

// -----------------------------------------------
// Version check
// -----------------------------------------------
case OB_VERSION_CHECK:
	echo <<<EOB
		<div class="info"><h2>APC Version Information</h2>
		<table cellspacing=0><tbody>
		<tr>
		<th></th>
		</tr>
EOB;

	$rss = @file_get_contents("http://pecl.php.net/feeds/pkg_apc.rss");
	if (!$rss) {
		echo '<tr class="td-last center"><td>Unable to fetch version information.</td></tr>';
	} else {
		$apcversion = phpversion('apc');

		preg_match('!<title>APC ([0-9.]+)</title>!', $rss, $match);
		echo '<tr class="tr-0 center"><td>';
		if (version_compare($apcversion, $match[1], '>=')) {
			echo '<div class="ok">You are running the latest version of APC ('.$apcversion.')</div>';
			$i = 3;
		} else {
			echo '<div class="failed">You are running an older version of APC ('.$apcversion.'), 
				newer version '.$match[1].' is available at <a href="http://pecl.php.net/package/APC/'.$match[1].'">
				http://pecl.php.net/package/APC/'.$match&#91;1&#93;.'</a>
				</div>';
			$i = -1;
		}
		echo '</td></tr>';
		echo '<tr class="tr-0"><td><h3>Change Log:</h3><br/>';

		preg_match_all('!<(title|description)>([^<]+)</\\1>!', $rss, $match);
		next($match[2]); next($match[2]);

		while (list(,$v) = each($match[2])) {
			list(,$ver) = explode(' ', $v, 2);
			if ($i < 0 && version_compare($apcversion, $ver, '>=')) {
				break;
			} else if (!$i--) {
				break;
			}
			echo "<b><a href=\"http://pecl.php.net/package/APC/$ver\">".htmlspecialchars($v)."</a></b><br><blockquote>";
			echo nl2br(htmlspecialchars(current($match[2])))."</blockquote>";
			next($match[2]);
		}
		echo '</td></tr>';
	}
	echo <<< EOB
		</tbody></table>
		</div>
EOB;
	break;

}

echo <<< EOB
	</div>
EOB;

?>

<!-- <?php echo "\nBased on APCGUI By R.Becker\n$VERSION\n"?> -->
</body>
</html>
Et pour me faire pardonner, une capture de ce a quoi ça devrait ressembler:
Image
Mais qu'importe. (je suis ici - dernier petit projet)
Berze going social.

2 messages   •   Page 1 sur 1