Queue implementation code based on Memcache written in PHP_PHP tutorial

class MQ{
public static $client;
private static $m_real;
private static $m_front;
private static $m_data = array();
const QUEUE_MAX_NUM = 100000000;
const QUEUE_FRONT_KEY = '_queue_item_front';
const QUEUE_REAL_KEY = '_queue_item_real';
public static function setupMq($conf) {
self::$client = memcache_pconnect($conf);
self::$m_real = memcache_get(self::$client, self::QUEUE_REAL_KEY);
self::$m_front = memcache_get(self::$client, self::QUEUE_FRONT_KEY);
if (!isset(self::$m_real) || emptyempty(self::$m_real)) {
self::$real= 0;
}
if (!isset(self::$m_front) || emptyempty(self::$m_front)) {
self::$m_front = 0;
}
return self::$client;
}
public static function add($queue, $data) {
$result = false;
if (self::$m_real < self::QUEUE_MAX_NUM) {
if (memcache_add(self::$client, $queue.self::$m_real, $data)) {
self::mqRealChange();
$result = true;
}
}
return $result;
}
public static function get($key, $count) {
$num = 0;
for ($i=self::$m_front;$iif ($dataTmp = memcache_get(self::$client, $key.$i)) {
self::$m_data[] = $dataTmp;
memcache_delete(self::$client, $key.$i);
$num++;
}
}
if ($num>0) {
self::mqFrontChange($num);
}
return self::$m_data;
}
private static function mqRealChange() {
memcache_add(self::$client, self::QUEUE_REAL_KEY, 0);
self::$m_real = memcache_increment(self::$client, self::QUEUE_REAL_KEY, 1);
}
private static function mqFrontChange($num) {
memcache_add(self::$client, self::QUEUE_FRONT_KEY, 0);
self::$m_front = memcache_increment(self::$client, self::QUEUE_FRONT_KEY, $num);
}
public static function mflush($memcache_obj) {
memcache_flush($memcache_obj);
}
public static function Debug() {
echo 'real:'.self::$m_real."
/r/n";
echo 'front:'.self::$m_front."
/r/n";
echo 'wait for process data:'.intval(self::$m_real - self::$m_front);
echo "
/r/n";
echo '

'; 
print_r(self::$m_data); 
echo '
'; 
} 
} 
define('FLUSH_MQ',0);//CLEAN ALL DATA 
define('IS_ADD',0);//SET DATA 
$mobj = MQ::setupMq('127.0.0.1','11211'); 
if (FLUSH_MQ) { 
MQ::mflush($mobj); 
} else { 
if (IS_ADD) { 
MQ::add('user_sync', '1test'); 
MQ::add('user_sync', '2test'); 
MQ::add('user_sync', '3test'); 
MQ::add('user_sync', '4test'); 
MQ::add('user_sync', '5test'); 
MQ::add('user_sync', '6test'); 
} else { 
MQ::get('user_sync', 10); 
} 
} 
MQ::Debug(); 
?> 

MQ::setupMq('127.0.0.1','11211');//连接
MQ::add($key, $value);//添加数据到队列
MQ::add($key, $value);//添加数据到队列
MQ::add($key, $value);//添加数据到队列
MQ::add($key, $value);//添加数据到队列
MQ::add($key, $value);//添加数据到队列
MQ::add($key, $value);//添加数据到队列
MQ:get($key, 10);//取出一定数量的数据