代码如下，代码为memcache官方代码，引用在此，做一下简单的说明：

1、设置用户名和密码

define('ADMIN_USERNAME','admin'); // Admin Username
define('ADMIN_PASSWORD','123456'); // Admin Password

2、配置服务器及其端口，可以配置多台

$MEMCACHE_SERVERS[] = 'localhost:11211'; // add more as an array
$MEMCACHE_SERVERS[] = 'localhost:11212'; // add more as an array

                       |  +----------------------------------------------------------------------+*/$VERSION='$Id: memcache.php,v 1.1.2.3 2008/08/28 18:07:54 mikl Exp $';define('ADMIN_USERNAME','admin'); 	// Admin Usernamedefine('ADMIN_PASSWORD','123456');  	// Admin Passworddefine('DATE_FORMAT','Y/m/d H:i:s');define('GRAPH_SIZE',200);define('MAX_ITEM_DUMP',50);$MEMCACHE_SERVERS[] = 'localhost:11211'; // add more as an array////////// END OF DEFAULT CONFIG AREA ////////////////////////////////////////////////////////////////////////////// Password protect ////////////////////////////////////////////////////////////////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=\"Memcache Login\"");			Header("HTTP/1.0 401 Unauthorized");			echo <<				
Rejected!
				Wrong Username or Password!				EOB;			exit;}///////////MEMCACHE FUNCTIONS /////////////////////////////////////////////////////////////////////function sendMemcacheCommands($command){    global $MEMCACHE_SERVERS;	$result = array();	foreach($MEMCACHE_SERVERS as $server){		$strs = explode(':',$server);		$host = $strs[0];		$port = $strs[1];		$result[$server] = sendMemcacheCommand($host,$port,$command);	}	return $result;}function sendMemcacheCommand($server,$port,$command){	$s = @fsockopen($server,$port);	if (!$s){		die("Cant connect to:".$server.':'.$port);	}	fwrite($s, $command."\r\n");	$buf='';	while ((!feof($s))) {		$buf .= fgets($s, 256);		if (strpos($buf,"END\r\n")!==false){ // stat says end		    break;		}		if (strpos($buf,"DELETED\r\n")!==false || strpos($buf,"NOT_FOUND\r\n")!==false){ // delete says these		    break;		}		if (strpos($buf,"OK\r\n")!==false){ // flush_all says ok		    break;		}	}    fclose($s);    return parseMemcacheResults($buf);}function parseMemcacheResults($str){    	$res = array();	$lines = explode("\r\n",$str);	$cnt = count($lines);	for($i=0; $i< $cnt; $i++){	    $line = $lines[$i];		$l = explode(' ',$line,3);		if (count($l)==3){			$res[$l[0]][$l[1]]=$l[2];			if ($l[0]=='VALUE'){ // next line is the value			    $res[$l[0]][$l[1]] = array();			    list ($flag,$size)=explode(' ',$l[2]);			    $res[$l[0]][$l[1]]['stat']=array('flag'=>$flag,'size'=>$size);			    $res[$l[0]][$l[1]]['value']=$lines[++$i];			}		}elseif($line=='DELETED' || $line=='NOT_FOUND' || $line=='OK'){		    return $line;		}	}	return $res;}function dumpCacheSlab($server,$slabId,$limit){    list($host,$port) = explode(':',$server);    $resp = sendMemcacheCommand($host,$port,'stats cachedump '.$slabId.' '.$limit);   return $resp;}function flushServer($server){    list($host,$port) = explode(':',$server);    $resp = sendMemcacheCommand($host,$port,'flush_all');    return $resp;}function getCacheItems(){ $items = sendMemcacheCommands('stats items'); $serverItems = array(); $totalItems = array(); foreach ($items as $server=>$itemlist){    $serverItems[$server] = array();    $totalItems[$server]=0;    if (!isset($itemlist['STAT'])){        continue;    }    $iteminfo = $itemlist['STAT'];    foreach($iteminfo as $keyinfo=>$value){        if (preg_match('/items\:(\d+?)\:(.+?)$/',$keyinfo,$matches)){            $serverItems[$server][$matches[1]][$matches[2]] = $value;            if ($matches[2]=='number'){                $totalItems[$server] +=$value;            }        }    } } return array('items'=>$serverItems,'counts'=>$totalItems);}function getMemcacheStats($total=true){	$resp = sendMemcacheCommands('stats');	if ($total){		$res = array();		foreach($resp as $server=>$r){			foreach($r['STAT'] as $key=>$row){				if (!isset($res[$key])){					$res[$key]=null;				}				switch ($key){					case 'pid':						$res['pid'][$server]=$row;						break;					case 'uptime':						$res['uptime'][$server]=$row;						break;					case 'time':						$res['time'][$server]=$row;						break;					case 'version':						$res['version'][$server]=$row;						break;					case 'pointer_size':						$res['pointer_size'][$server]=$row;						break;					case 'rusage_user':						$res['rusage_user'][$server]=$row;						break;					case 'rusage_system':						$res['rusage_system'][$server]=$row;						break;					case 'curr_items':						$res['curr_items']+=$row;						break;					case 'total_items':						$res['total_items']+=$row;						break;					case 'bytes':						$res['bytes']+=$row;						break;					case 'curr_connections':						$res['curr_connections']+=$row;						break;					case 'total_connections':						$res['total_connections']+=$row;						break;					case 'connection_structures':						$res['connection_structures']+=$row;						break;					case 'cmd_get':						$res['cmd_get']+=$row;						break;					case 'cmd_set':						$res['cmd_set']+=$row;						break;					case 'get_hits':						$res['get_hits']+=$row;						break;					case 'get_misses':						$res['get_misses']+=$row;						break;					case 'evictions':						$res['evictions']+=$row;						break;					case 'bytes_read':						$res['bytes_read']+=$row;						break;					case 'bytes_written':						$res['bytes_written']+=$row;						break;					case 'limit_maxbytes':						$res['limit_maxbytes']+=$row;						break;					case 'threads':						$res['rusage_system'][$server]=$row;						break;				}			}		}		return $res;	}	return $resp;}////////////////////////////////////////////////////////// don't cache this page//header("Cache-Control: no-store, no-cache, must-revalidate");  // HTTP/1.1header("Cache-Control: post-check=0, pre-check=0", false);header("Pragma: no-cache");                                    // HTTP/1.0function duration($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 $str;}// create graphics//function graphics_avail() {	return extension_loaded('gd');}function bsize($s) {	foreach (array('','K','M','G') as $i => $k) {		if ($s < 1024) break;		$s/=1024;	}	return sprintf("%5.1f %sBytes",$s,$k);}// create menu entryfunction menu_entry($ob,$title) {	global $PHP_SELF;	if ($ob==$_GET['op']){	    return "
$title
";	}	return "
$title
";}function getHeader(){    $header = <<	
		memcache		memcache.php by Harun Yayli	
	
EOB;    return $header;}function getFooter(){    global $VERSION;    $footer = '';    return $footer;}function getMenu(){    global $PHP_SELF;echo "
";if ($_GET['op']!=4){echo <<Refresh DataEOB;}else {echo <<BackEOB;}echo	menu_entry(1,'View Host Stats'),	menu_entry(2,'Variables');echo <<	
EOB;}// TODO, AUTH$_GET['op'] = !isset($_GET['op'])? '1':$_GET['op'];$PHP_SELF= isset($_SERVER['PHP_SELF']) ? htmlentities(strip_tags($_SERVER['PHP_SELF'],'')) : '';$PHP_SELF=$PHP_SELF.'?';$time = time();// sanitize _GETforeach($_GET as $key=>$g){    $_GET[$key]=htmlentities($g);}// singleout// when singleout is set, it only gives details for that server.if (isset($_GET['singleout']) && $_GET['singleout']>=0 && $_GET['singleout'] $y) imagefilledrectangle($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,$color1);			}		}	}    function fill_arc($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);			}		}	}	$size = GRAPH_SIZE; // image size	$image = imagecreate($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 ($_GET['IMG']){        case 1: // pie chart            $tsize=$memcacheStats['limit_maxbytes'];    		$avail=$tsize-$memcacheStats['bytes'];    		$x=$y=$size/2;    		$angle_from = 0;    		$fuzz = 0.000001;            foreach($memcacheStatsSingle as $serv=>$mcs) {    			$free = $mcs['STAT']['limit_maxbytes']-$mcs['STAT']['bytes'];    			$used = $mcs['STAT']['bytes'];                if ($free>0){    			// draw free    			    $angle_to = ($free*360)/$tsize;                    $perc =sprintf("%.2f%%", ($free *100) / $tsize) ;        			fill_arc($image,$x,$y,$size,$angle_from,$angle_from + $angle_to ,$col_black,$col_green,$perc);        			$angle_from = $angle_from + $angle_to ;                }    			if ($used>0){    			// draw used        			$angle_to = ($used*360)/$tsize;        			$perc =sprintf("%.2f%%", ($used *100) / $tsize) ;        			fill_arc($image,$x,$y,$size,$angle_from,$angle_from + $angle_to ,$col_black,$col_red, '('.$perc.')' );                    $angle_from = $angle_from+ $angle_to ;    			}    			}        break;        case 2: // hit miss            $hits = ($memcacheStats['get_hits']==0) ? 1:$memcacheStats['get_hits'];            $misses = ($memcacheStats['get_misses']==0) ? 1:$memcacheStats['get_misses'];            $total = $hits + $misses ;	       	fill_box($image, 30,$size,50,-$hits*($size-21)/$total,$col_black,$col_green,sprintf("%.1f%%",$hits*100/$total));		    fill_box($image,130,$size,50,-max(4,($total-$hits)*($size-21)/$total),$col_black,$col_red,sprintf("%.1f%%",$misses*100/$total));		break;		    }    header("Content-type: image/png");	imagepng($image);	exit;}echo getHeader();echo getMenu();switch ($_GET['op']) {    case 1: // host stats    	$phpversion = phpversion();        $memcacheStats = getMemcacheStats();        $memcacheStatsSingle = getMemcacheStats(false);        $mem_size = $memcacheStats['limit_maxbytes'];    	$mem_used = $memcacheStats['bytes'];	    $mem_avail= $mem_size-$mem_used;	    $startTime = time()-array_sum($memcacheStats['uptime']);        $curr_items = $memcacheStats['curr_items'];        $total_items = $memcacheStats['total_items'];        $hits = ($memcacheStats['get_hits']==0) ? 1:$memcacheStats['get_hits'];        $misses = ($memcacheStats['get_misses']==0) ? 1:$memcacheStats['get_misses'];        $sets = $memcacheStats['cmd_set'];       	$req_rate = sprintf("%.2f",($hits+$misses)/($time-$startTime));	    $hit_rate = sprintf("%.2f",($hits)/($time-$startTime));	    $miss_rate = sprintf("%.2f",($misses)/($time-$startTime));	    $set_rate = sprintf("%.2f",($sets)/($time-$startTime));	    echo <<< EOB		
General Cache Information
		EOB;		echo "\n";		echo "\n";	echo <<
		
PHP Version
$phpversion
Memcached Host". ((count($MEMCACHE_SERVERS)>1) ? 's':'')."
";		$i=0;		if (!isset($_GET['singleout']) && count($MEMCACHE_SERVERS)>1){    		foreach($MEMCACHE_SERVERS as $server){    		      echo ($i+1).'. '.$server.'
';    		}		}		else{		    echo '1.'.$MEMCACHE_SERVERS[0];		}		if (isset($_GET['singleout'])){		      echo '(all servers)
';		}		echo "
Total Memcache Cache
".bsize($memcacheStats['limit_maxbytes'])."
				
Memcache Server Information
EOB;        foreach($MEMCACHE_SERVERS as $server){            echo '';            echo '';    		echo '';    		echo '';    		echo '';    		echo '';    		echo '';    		echo '
'.$server.'
[Flush this server]
Start Time
',date(DATE_FORMAT,$memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'
Uptime
',duration($memcacheStatsSingle[$server]['STAT']['time']-$memcacheStatsSingle[$server]['STAT']['uptime']),'
Memcached Server Version
'.$memcacheStatsSingle[$server]['STAT']['version'].'
Used Cache Size
',bsize($memcacheStatsSingle[$server]['STAT']['bytes']),'
Total Cache Size
',bsize($memcacheStatsSingle[$server]['STAT']['limit_maxbytes']),'
';	   }    echo <<Host Status Diagrams		EOB;	$size='width='.(GRAPH_SIZE+50).' height='.(GRAPH_SIZE+10);	echo <<		EOB;	echo		graphics_avail() ?			  ''.			  "".			  "\n"			: "",		'',		'\n",		'\n",		'',		'',		'\n",		'\n";		echo <<< EOB	
Cache Usage
		
Hits & Misses
		
 Free: ',bsize($mem_avail).sprintf(" (%.1f%%)",$mem_avail*100/$mem_size),"
 Hits: ',$hits.sprintf(" (%.1f%%)",$hits*100/($hits+$misses)),"
 Used: ',bsize($mem_used ).sprintf(" (%.1f%%)",$mem_used *100/$mem_size),"
 Misses: ',$misses.sprintf(" (%.1f%%)",$misses*100/($hits+$misses)),"
	

	
Cache Information
		
		
Current Items(total)
$curr_items ($total_items)
		
Hits
{$hits}
		
Misses
{$misses}
		
Request Rate (hits, misses)
$req_rate cache requests/second
		
Hit Rate
$hit_rate cache requests/second
		
Miss Rate
$miss_rate cache requests/second
		
Set Rate
$set_rate cache requests/second
		
		EOB;    break;    case 2: // variables		$m=0;		$cacheItems= getCacheItems();		$items = $cacheItems['items'];		$totals = $cacheItems['counts'];		$maxDump = MAX_ITEM_DUMP;		foreach($items as $server => $entries) {    	echo <<< EOB			EOB;			foreach($entries as $slabId => $slab) {			    $dumpUrl = $PHP_SELF.'&op=2&server='.(array_search($server,$MEMCACHE_SERVERS)).'&dumpslab='.$slabId;				echo					"",					"",					"";				$m=1-$m;			}		echo <<
			
$server
			
Slab Id
Info
",'',$slabId,'',"
Item count: ",$slab['number'],'
Age:',duration($time-$slab['age']),'
 Evicted:',((isset($slab['evicted']) && $slab['evicted']==1)? 'Yes':'No');					if ((isset($_GET['dumpslab']) && $_GET['dumpslab']==$slabId) &&  (isset($_GET['server']) && $_GET['server']==array_search($server,$MEMCACHE_SERVERS))){					    echo "
Items: item
";					    $items = dumpCacheSlab($server,$slabId,$slab['number']);                        // maybe someone likes to do a pagination here :)					    $i=1;                        foreach($items['ITEM'] as $itemKey=>$itemInfo){                            $itemInfo = trim($itemInfo,'[ ]');                            echo '',$itemKey,'';                            if ($i++ % 10 == 0) {                                echo '
';                            }                            elseif ($i!=$slab['number']+1){                                echo ',';                            }                        }					}					echo "
			
EOB;}		break;    break;    case 4: //item dump        if (!isset($_GET['key']) || !isset($_GET['server'])){            echo "No key set!";            break;        }        // I'm not doing anything to check the validity of the key string.        // probably an exploit can be written to delete all the files in key=base64_encode("\n\r delete all").        // somebody has to do a fix to this.        $theKey = htmlentities(base64_decode($_GET['key']));        $theserver = $MEMCACHE_SERVERS[(int)$_GET['server']];        list($h,$p) = explode(':',$theserver);        $r = sendMemcacheCommand($h,$p,'get '.$theKey);        echo <<			ServerKeyValueDeleteEOB;        echo "",$theserver,"",$theKey,             " 
flag:",$r['VALUE'][$theKey]['stat']['flag'],             " 
Size:",bsize($r['VALUE'][$theKey]['stat']['size']),             "",chunk_split($r['VALUE'][$theKey]['value'],40),"",             'Delete","";        echo <<			
EOB;    break;    case 5: // item delete    	if (!isset($_GET['key']) || !isset($_GET['server'])){			echo "No key set!";			break;        }        $theKey = htmlentities(base64_decode($_GET['key']));		$theserver = $MEMCACHE_SERVERS[(int)$_GET['server']];		list($h,$p) = explode(':',$theserver);        $r = sendMemcacheCommand($h,$p,'delete '.$theKey);        echo 'Deleting '.$theKey.':'.$r;	break;       case 6: // flush server        $theserver = $MEMCACHE_SERVERS[(int)$_GET['server']];        $r = flushServer($theserver);        echo 'Flush  '.$theserver.":".$r;   break;}echo getFooter();?>