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Rumah  >  Artikel  >  pembangunan bahagian belakang  >  Cara menggunakan pthread php

Cara menggunakan pthread php

藏色散人
藏色散人asal
2021-09-15 10:20:421996semak imbas

Cara menggunakan pthread php: 1. Pasang pthread melalui "pecl install pthreads"; 2. Gunakan kunci mutex apabila anda perlu mengawal beberapa utas dan hanya satu utas boleh berfungsi pada masa yang sama.

Cara menggunakan pthread php

Persekitaran pengendalian artikel ini: sistem windows7, versi php7.0.2, komputer DELL G3

Pemasangan dan penggunaan php pthread berbilang benang

Memasang Pthreads pada asasnya memerlukan penyusunan semula PHP dan menambah parameter --enable-maintainer-zts, tetapi terdapat beberapa dokumen untuk menggunakan ini; akan terdapat banyak pepijat dan masalah yang tidak dijangka dalam persekitaran pengeluaran. Saya hanya boleh haha, jadi mari kita bermain dengan perkara ini untuk multi-threading sebenar, anda masih perlu menggunakan Python, C, dll.

Kebanyakan kod berikut datang dari Internet

1. Pemasangan

Apa yang digunakan di sini ialah php-7.0.2

./configure \
--prefix=/usr/local/php7 \
--with-config-file-path=/etc \
--with-config-file-scan-dir=/etc/php.d \
--enable-debug \
--enable-maintainer-zts \
--enable-pcntl \
--enable-fpm \
--enable-opcache \
--enable-embed=shared \
--enable-json=shared \
--enable-phpdbg \
--with-curl=shared \
--with-mysql=/usr/local/mysql \
--with-mysqli=/usr/local/mysql/bin/mysql_config \
--with-pdo-mysql


make && make install
Pasang pthread

pecl install pthreads
2 🎜>

3. Worker dan Stackable

<?php
#1
$thread = new class extends Thread {
	public function run() {
		echo "Hello World {$this->getThreadId()}\n";                                                                                  
	}   
};

$thread->start() && $thread->join();



#2

class workerThread extends Thread { 
	public function __construct($i){
		$this->i=$i;
	}

	public function run(){
		while(true){
			echo $this->i."\n";
			sleep(1);
		} 
	} 
}

for($i=0;$i<50;$i++){
	$workers[$i]=new workerThread($i);
	$workers[$i]->start();
}

?>

Stackable ialah tugasan yang dilaksanakan oleh Worker thread Anda boleh menyegerakkan dengan, membaca dan menulis objek Stackable sebelum, selepas dan semasa pelaksanaannya.

4. Kunci pengecualian bersama
<?php
class SQLQuery extends Stackable {

	public function __construct($sql) {
		$this->sql = $sql;
	}

	public function run() {
		$dbh  = $this->worker->getConnection();
		$row = $dbh->query($this->sql);
		while($member = $row->fetch(PDO::FETCH_ASSOC)){
			print_r($member);
		}
	}

}

class ExampleWorker extends Worker {
	public static $dbh;
	public function __construct($name) {
	}

	public function run(){
		self::$dbh = new PDO(&#39;mysql:host=10.0.0.30;dbname=testdb&#39;,&#39;root&#39;,&#39;123456&#39;);
	}
	public function getConnection(){
		return self::$dbh;
	}
}

$worker = new ExampleWorker("My Worker Thread");

$sql1 = new SQLQuery(&#39;select * from test order by id desc limit 1,5&#39;);
$worker->stack($sql1);

$sql2 = new SQLQuery(&#39;select * from test order by id desc limit 5,5&#39;);
$worker->stack($sql2);

$worker->start();
$worker->shutdown();
?>
Dalam keadaan apakah kunci mutex akan digunakan? Ia boleh digunakan apabila anda perlu mengawal beberapa utas dan hanya satu utas boleh berfungsi pada masa yang sama. Program kaunter ringkas yang menggambarkan perbezaan dengan dan tanpa mutex

Memori berbilang benang dan dikongsi

<?php
$counter = 0;
$handle=fopen("/tmp/counter.txt", "w");
fwrite($handle, $counter );
fclose($handle);

class CounterThread extends Thread {
	public function __construct($mutex = null){
		$this->mutex = $mutex;
		$this->handle = fopen("/tmp/counter.txt", "w+");
	}
	public function __destruct(){
		fclose($this->handle);
	}
	public function run() {
		if($this->mutex)
			$locked=Mutex::lock($this->mutex);

		$counter = intval(fgets($this->handle));
		$counter++;
		rewind($this->handle);
		fputs($this->handle, $counter );
		printf("Thread #%lu says: %s\n", $this->getThreadId(),$counter);

		if($this->mutex)
			Mutex::unlock($this->mutex);
	}
}

//没有互斥锁
for ($i=0;$i<50;$i++){
	$threads[$i] = new CounterThread();
	$threads[$i]->start();

}

//加入互斥锁
$mutex = Mutex::create(true);
for ($i=0;$i<50;$i++){
	$threads[$i] = new CounterThread($mutex);
	$threads[$i]->start();

}

Mutex::unlock($mutex);
for ($i=0;$i<50;$i++){
	$threads[$i]->join();
}
Mutex::destroy($mutex);

?>
Dalam contoh memori kongsi, tiada kunci digunakan, ia masih boleh berfungsi. biasanya, mungkin operasi memori yang berfungsi itu sendiri mempunyai fungsi mengunci

5 Penyegerakan benang

<?php
$tmp = tempnam(__FILE__, &#39;PHP&#39;);
$key = ftok($tmp, &#39;a&#39;);

$shmid = shm_attach($key);
$counter = 0;
shm_put_var( $shmid, 1, $counter );

class CounterThread extends Thread {
	public function __construct($shmid){
		$this->shmid = $shmid;
	}
	public function run() {

		$counter = shm_get_var( $this->shmid, 1 );
		$counter++;
		shm_put_var( $this->shmid, 1, $counter );

		printf("Thread #%lu says: %s\n", $this->getThreadId(),$counter);
	}
}

for ($i=0;$i<100;$i++){
	$threads[] = new CounterThread($shmid);
}
for ($i=0;$i<100;$i++){
	$threads[$i]->start();

}

for ($i=0;$i<100;$i++){
	$threads[$i]->join();
}
shm_remove( $shmid );
shm_detach( $shmid );
?>
Dalam sesetengah senario kami tidak mahu thread->start() mula menjalankan thread. program, tetapi Semoga benang sedang menunggu arahan kami. Fungsi ujian $thread->wait(); ialah thread tidak akan dijalankan serta-merta selepas thread->start(). >

6. Kumpulan benang

Kelas Pool
<?php
$tmp = tempnam(__FILE__, &#39;PHP&#39;);
$key = ftok($tmp, &#39;a&#39;);

$shmid = shm_attach($key);
$counter = 0;
shm_put_var( $shmid, 1, $counter );

class CounterThread extends Thread {
	public function __construct($shmid){
		$this->shmid = $shmid;
	}
	public function run() {

		$this->synchronized(function($thread){
				$thread->wait();
				}, $this);

		$counter = shm_get_var( $this->shmid, 1 );
		$counter++;
		shm_put_var( $this->shmid, 1, $counter );

		printf("Thread #%lu says: %s\n", $this->getThreadId(),$counter);
	}
}

for ($i=0;$i<100;$i++){
	$threads[] = new CounterThread($shmid);
}
for ($i=0;$i<100;$i++){
	$threads[$i]->start();

}

for ($i=0;$i<100;$i++){
	$threads[$i]->synchronized(function($thread){
			$thread->notify();
			}, $threads[$i]);
}

for ($i=0;$i<100;$i++){
	$threads[$i]->join();
}
shm_remove( $shmid );
shm_detach( $shmid );
?>

Kolam benang gilir dinamik

Contoh di atas adalah untuk melaksanakan bermula apabila kumpulan benang adalah penuh. Contoh berikut mencipta benang baharu sebaik sahaja terdapat ruang dalam kumpulan benang. 
<?php
class Update extends Thread {

    public $running = false;
    public $row = array();
    public function __construct($row) {

	$this->row = $row;
        $this->sql = null;
    }

    public function run() {

	if(strlen($this->row[&#39;bankno&#39;]) > 100 ){
		$bankno = safenet_decrypt($this->row[&#39;bankno&#39;]);
	}else{
		$error = sprintf("%s, %s\r\n",$this->row[&#39;id&#39;], $this->row[&#39;bankno&#39;]);
		file_put_contents("bankno_error.log", $error, FILE_APPEND);
	}

	if( strlen($bankno) > 7 ){
		$sql = sprintf("update members set bankno = &#39;%s&#39; where id = &#39;%s&#39;;", $bankno, $this->row[&#39;id&#39;]);

		$this->sql = $sql;
	}

	printf("%s\n",$this->sql);
    }

}

class Pool {
	public $pool = array();
	public function __construct($count) {
		$this->count = $count;
	}
	public function push($row){
		if(count($this->pool) < $this->count){
			$this->pool[] = new Update($row);
			return true;
		}else{
			return false;
		}
	}
	public function start(){
		foreach ( $this->pool as $id => $worker){
			$this->pool[$id]->start();
		}
	}
	public function join(){
		foreach ( $this->pool as $id => $worker){
               $this->pool[$id]->join();
		}
	}
	public function clean(){
		foreach ( $this->pool as $id => $worker){
			if(! $worker->isRunning()){
            	unset($this->pool[$id]);
            }
		}
	}
}

try {
	$dbh    = new PDO("mysql:host=" . str_replace(&#39;:&#39;, &#39;;port=&#39;, $dbhost) . ";dbname=$dbname", $dbuser, $dbpw, array(
		PDO::MYSQL_ATTR_INIT_COMMAND => &#39;SET NAMES \&#39;UTF8\&#39;&#39;,
		PDO::MYSQL_ATTR_COMPRESS => true
		)
	);

	$sql  = "select id,bankno from members order by id desc";
	$row = $dbh->query($sql);
	$pool = new Pool(5);
	while($member = $row->fetch(PDO::FETCH_ASSOC))
	{

		while(true){
			if($pool->push($member)){ //压入任务到池中
				break;
			}else{ //如果池已经满，就开始启动线程
				$pool->start();
				$pool->join();
				$pool->clean();
			}
		}
	}
	$pool->start();
    $pool->join();

	$dbh = null;

} catch (Exception $e) {
    echo &#39;[&#39; , date(&#39;H:i:s&#39;) , &#39;]&#39;, &#39;系统错误&#39;, $e->getMessage(), "\n";
}
?>

pthreads Pool class

<?php
class Update extends Thread {

	public $running = false;
	public $row = array();
	public function __construct($row) {

		$this->row = $row;
		$this->sql = null;
		//print_r($this->row);
	}

	public function run() {

		if(strlen($this->row[&#39;bankno&#39;]) > 100 ){
			$bankno = safenet_decrypt($this->row[&#39;bankno&#39;]);
		}else{
			$error = sprintf("%s, %s\r\n",$this->row[&#39;id&#39;], $this->row[&#39;bankno&#39;]);
			file_put_contents("bankno_error.log", $error, FILE_APPEND);
		}

		if( strlen($bankno) > 7 ){
			$sql = sprintf("update members set bankno = &#39;%s&#39; where id = &#39;%s&#39;;", $bankno, $this->row[&#39;id&#39;]);

			$this->sql = $sql;
		}

		printf("%s\n",$this->sql);
	}

}

try {
	$dbh    = new PDO("mysql:host=" . str_replace(&#39;:&#39;, &#39;;port=&#39;, $dbhost) . ";dbname=$dbname", $dbuser, $dbpw, array(
				PDO::MYSQL_ATTR_INIT_COMMAND => &#39;SET NAMES \&#39;UTF8\&#39;&#39;,
				PDO::MYSQL_ATTR_COMPRESS => true
				)
			);

	$sql     = "select id,bankno from members order by id desc limit 50";

	$row = $dbh->query($sql);
	$pool = array();
	while($member = $row->fetch(PDO::FETCH_ASSOC))
	{
		$id 	= $member[&#39;id&#39;];
		while (true){
			if(count($pool) < 5){
				$pool[$id] = new Update($member);
				$pool[$id]->start();
				break;
			}else{
				foreach ( $pool as $name => $worker){
					if(! $worker->isRunning()){
						unset($pool[$name]);
					}
				}
			}
		}

	}

	$dbh = null;

} catch (Exception $e) {
	echo &#39;【&#39; , date(&#39;H:i:s&#39;) , &#39;】&#39;, &#39;【系统错误】&#39;, $e->getMessage(), "\n";
}
?>　
7. Fail berbilang benang selamat membaca dan menulis

<?php

class WebWorker extends Worker {

	public function __construct(SafeLog $logger) {
		$this->logger = $logger;
	}

	protected $loger;
}

class WebWork extends Stackable {

	public function isComplete() {
		return $this->complete;
	}

	public function run() {
		$this->worker
			->logger
			->log("%s executing in Thread #%lu",
					__CLASS__, $this->worker->getThreadId());
		$this->complete = true;
	}

	protected $complete;
}

class SafeLog extends Stackable {

	protected function log($message, $args = []) {
		$args = func_get_args();

		if (($message = array_shift($args))) {
			echo vsprintf(
					"{$message}\n", $args);
		}
	}
}


$pool = new Pool(8, \WebWorker::class, [new SafeLog()]);

$pool->submit($w=new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->submit(new WebWork());
$pool->shutdown();

$pool->collect(function($work){
		return $work->isComplete();
		});

var_dump($pool);

LOCK_SH memperoleh kunci kongsi (program membaca. )

  • LOCK_EX memperoleh kunci eksklusif (program yang ditulis oleh

  • LOCK_UN melepaskan kunci (sama ada dikongsi atau eksklusif)

  • LOCK_NB Jika anda tidak mahu flock() disekat semasa mengunci

  • 8 Gunakan pthreads dan pdo pada masa yang sama , satu perkara yang perlu diperhatikan ialah anda perlu mengisytiharkan $dbh statik awam dan mengakses sambungan pangkalan data melalui mod tunggal dalam
Worker dan PDO
<?php

$fp = fopen("/tmp/lock.txt", "r+");
if (flock($fp, LOCK_EX)) {  // 进行排它型锁定
	ftruncate($fp, 0);      // truncate file
	fwrite($fp, "Write something here\n");
	fflush($fp);            // flush output before releasing the lock
	flock($fp, LOCK_UN);    // 释放锁定
} else {
	echo "Couldn&#39;t get the lock!";
}
fclose($fp);



$fp = fopen(&#39;/tmp/lock.txt&#39;, &#39;r+&#39;);
if(!flock($fp, LOCK_EX | LOCK_NB)) {
	echo &#39;Unable to obtain lock&#39;;
	exit(-1);
}
fclose($fp);
?>

Pool dan PDO

Memautkan pangkalan data dalam kumpulan benang

Untuk menambah baik lagi program di atas, kami menggunakan mod tunggal $this->worker->getInstance(. ); untuk membuat hanya satu sambungan pangkalan data secara global, dan utas menggunakan sambungan pangkalan data yang dikongsi 
<?php
class Work extends Stackable {

        public function __construct() {
        }

        public function run() {
                $dbh  = $this->worker->getConnection();
                $sql     = "select id,name from members order by id desc limit 50";
                $row = $dbh->query($sql);
                while($member = $row->fetch(PDO::FETCH_ASSOC)){
                        print_r($member);
                }
        }

}

class ExampleWorker extends Worker {
        public static $dbh;
        public function __construct($name) {
        }

        /*
        * The run method should just prepare the environment for the work that is coming ...
        */
        public function run(){
                self::$dbh = new PDO(&#39;mysql:host=192.168.2.1;dbname=example&#39;,&#39;www&#39;,&#39;123456&#39;);
        }
        public function getConnection(){
                return self::$dbh;
        }
}

$worker = new ExampleWorker("My Worker Thread");

$work=new Work();
$worker->stack($work);

$worker->start();
$worker->shutdown();
?>

Ringkasan operasi pangkalan data dalam berbilang benang

Secara amnya, pthread masih dalam pembangunan dan masih terdapat beberapa kekurangan. Kita juga dapat melihat bahawa git pthreads sentiasa bertambah baik Projek ini 
# cat pool.php
<?php
class ExampleWorker extends Worker {

	public function __construct(Logging $logger) {
		$this->logger = $logger;
	}

	protected $logger;
}

/* the collectable class implements machinery for Pool::collect */
class Work extends Stackable {
	public function __construct($number) {
		$this->number = $number;
	}
	public function run() {
                $dbhost = &#39;db.example.com&#39;;               // 数据库服务器
                $dbuser = &#39;example.com&#39;;                 // 数据库用户名
                $dbpw = &#39;password&#39;;                               // 数据库密码
                $dbname = &#39;example_real&#39;;
		$dbh  = new PDO("mysql:host=$dbhost;port=3306;dbname=$dbname", $dbuser, $dbpw, array(
                        PDO::MYSQL_ATTR_INIT_COMMAND => &#39;SET NAMES \&#39;UTF8\&#39;&#39;,
                        PDO::MYSQL_ATTR_COMPRESS => true,
			PDO::ATTR_PERSISTENT => true
                        )
                );
		$sql = "select OPEN_TIME, `COMMENT` from MT4_TRADES where LOGIN=&#39;".$this->number[&#39;name&#39;]."&#39; and CMD=&#39;6&#39; and `COMMENT` = &#39;".$this->number[&#39;order&#39;].":DEPOSIT&#39;";
		#echo $sql;
		$row = $dbh->query($sql);
		$mt4_trades  = $row->fetch(PDO::FETCH_ASSOC);
		if($mt4_trades){

			$row = null;

			$sql = "UPDATE db_example.accounts SET paystatus=&#39;成功&#39;, deposit_time=&#39;".$mt4_trades[&#39;OPEN_TIME&#39;]."&#39; where `order` = &#39;".$this->number[&#39;order&#39;]."&#39;;";
			$dbh->query($sql);
			#printf("%s\n",$sql);
		}
		$dbh = null;
		printf("runtime: %s, %s, %s\n", date(&#39;Y-m-d H:i:s&#39;), $this->worker->getThreadId() ,$this->number[&#39;order&#39;]);

	}
}

class Logging extends Stackable {
	protected  static $dbh;
	public function __construct() {
		$dbhost = &#39;db.example.com&#39;;			// 数据库服务器
	        $dbuser = &#39;example.com&#39;;                 // 数据库用户名
        	$dbpw = &#39;password&#39;;                               // 数据库密码
		$dbname = &#39;example_real&#39;;			// 数据库名

		self::$dbh  = new PDO("mysql:host=$dbhost;port=3306;dbname=$dbname", $dbuser, $dbpw, array(
			PDO::MYSQL_ATTR_INIT_COMMAND => &#39;SET NAMES \&#39;UTF8\&#39;&#39;,
			PDO::MYSQL_ATTR_COMPRESS => true
			)
		);

	}
	protected function log($message, $args = []) {
		$args = func_get_args();

		if (($message = array_shift($args))) {
			echo vsprintf("{$message}\n", $args);
		}
	}

	protected function getConnection(){
                return self::$dbh;
        }
}

$pool = new Pool(200, \ExampleWorker::class, [new Logging()]);

$dbhost = &#39;db.example.com&#39;;                      // 数据库服务器
$dbuser = &#39;example.com&#39;;                 // 数据库用户名
$dbpw = &#39;password&#39;;                               // 数据库密码
$dbname = &#39;db_example&#39;;
$dbh    = new PDO("mysql:host=$dbhost;port=3306;dbname=$dbname", $dbuser, $dbpw, array(
                        PDO::MYSQL_ATTR_INIT_COMMAND => &#39;SET NAMES \&#39;UTF8\&#39;&#39;,
                        PDO::MYSQL_ATTR_COMPRESS => true
                        )
                );
$sql = "select `order`,name from accounts where deposit_time is null order by id desc";

$row = $dbh->query($sql);
while($account = $row->fetch(PDO::FETCH_ASSOC))
{
        $pool->submit(new Work($account));
}

$pool->shutdown();

?>　

Sambungan pangkalan data yang berterusan adalah sangat penting, jika tidak, setiap thread akan membuka sambungan pangkalan data dan kemudian menutupnya, yang akan menyebabkan banyak. tamat masa sambungan 

<?php
class ExampleWorker extends Worker {

	#public function __construct(Logging $logger) {
	#	$this->logger = $logger;
	#}

	#protected $logger;
	protected  static $dbh;
	public function __construct() {

	}
	public function run(){
		$dbhost = &#39;db.example.com&#39;;			// 数据库服务器
	    $dbuser = &#39;example.com&#39;;        	// 数据库用户名
        $dbpw = &#39;password&#39;;             	// 数据库密码
		$dbname = &#39;example&#39;;				// 数据库名

		self::$dbh  = new PDO("mysql:host=$dbhost;port=3306;dbname=$dbname", $dbuser, $dbpw, array(
			PDO::MYSQL_ATTR_INIT_COMMAND => &#39;SET NAMES \&#39;UTF8\&#39;&#39;,
			PDO::MYSQL_ATTR_COMPRESS => true,
			PDO::ATTR_PERSISTENT => true
			)
		);

	}
	protected function getInstance(){
        return self::$dbh;
    }

}

/* the collectable class implements machinery for Pool::collect */
class Work extends Stackable {
	public function __construct($data) {
		$this->data = $data;
		#print_r($data);
	}

	public function run() {
		#$this->worker->logger->log("%s executing in Thread #%lu", __CLASS__, $this->worker->getThreadId() );

		try {
			$dbh  = $this->worker->getInstance();
			#print_r($dbh);
               		$id = $this->data[&#39;id&#39;];
			$mobile = safenet_decrypt($this->data[&#39;mobile&#39;]);
			#printf("%d, %s \n", $id, $mobile);
			if(strlen($mobile) > 11){
				$mobile = substr($mobile, -11);
			}
			if($mobile == &#39;null&#39;){
			#	$sql = "UPDATE members_digest SET mobile = &#39;".$mobile."&#39; where id = &#39;".$id."&#39;";
			#	printf("%s\n",$sql);
			#	$dbh->query($sql);
				$mobile = &#39;&#39;;
				$sql = "UPDATE members_digest SET mobile = :mobile where id = :id";
			}else{
				$sql = "UPDATE members_digest SET mobile = md5(:mobile) where id = :id";
			}
			$sth = $dbh->prepare($sql);
			$sth->bindValue(&#39;:mobile&#39;, $mobile);
			$sth->bindValue(&#39;:id&#39;, $id);
			$sth->execute();
			#echo $sth->debugDumpParams();
		}
		catch(PDOException $e) {
			$error = sprintf("%s,%s\n", $mobile, $id );
			file_put_contents("mobile_error.log", $error, FILE_APPEND);
		}

		#$dbh = null;
		printf("runtime: %s, %s, %s, %s\n", date(&#39;Y-m-d H:i:s&#39;), $this->worker->getThreadId() ,$mobile, $id);
		#printf("runtime: %s, %s\n", date(&#39;Y-m-d H:i:s&#39;), $this->number);
	}
}

$pool = new Pool(100, \ExampleWorker::class, []);

#foreach (range(0, 100) as $number) {
#	$pool->submit(new Work($number));
#}

$dbhost = &#39;db.example.com&#39;;                     // 数据库服务器
$dbuser = &#39;example.com&#39;;                 		// 数据库用户名
$dbpw = &#39;password&#39;;                             // 数据库密码
$dbname = &#39;example&#39;;
$dbh    = new PDO("mysql:host=$dbhost;port=3307;dbname=$dbname", $dbuser, $dbpw, array(
                        PDO::MYSQL_ATTR_INIT_COMMAND => &#39;SET NAMES \&#39;UTF8\&#39;&#39;,
                        PDO::MYSQL_ATTR_COMPRESS => true
                        )
                );
#print_r($dbh);

#$sql = "select id, mobile from members where id < :id";
#$sth = $dbh->prepare($sql);
#$sth->bindValue(&#39;:id&#39;,300);
#$sth->execute();
#$result = $sth->fetchAll();
#print_r($result);
#
#$sql = "UPDATE members_digest SET mobile = :mobile where id = :id";
#$sth = $dbh->prepare($sql);
#$sth->bindValue(&#39;:mobile&#39;, &#39;aa&#39;);
#$sth->bindValue(&#39;:id&#39;,&#39;272&#39;);
#echo $sth->execute();
#echo $sth->queryString;
#echo $sth->debugDumpParams();


$sql = "select id, mobile from members order by id asc"; // limit 1000";
$row = $dbh->query($sql);
while($members = $row->fetch(PDO::FETCH_ASSOC))
{
        #$order =  $account[&#39;order&#39;];
        #printf("%s\n",$order);
        //print_r($members);
        $pool->submit(new Work($members));
		#unset($account[&#39;order&#39;]);
}

$pool->shutdown();

?>

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