PHP multi-threading implements multi-process cross-platform code example

define('DIR_PHP_EXEC', 'php');
define('DIR_MAIN_EXEC', __FILE__);
define('DIR_TMP', '/tmp');
require_once('my_process.php');
class pp extends my_process_base {
public function run($param = null) {
       for ($i = 0; $i < 4; $i++) {
         echo "111 $paramn";
         sleep(1);
       }
}
}
init_my_process();
$obj = $GLOBALS['gal_obj_process_m'];
if ($obj->is_main()) {
$obj->run_task('pp', 'a');
$obj->run_task('pp', 'b');
$obj->run_task('pp', 'c');
$obj->run_task('pp', 'd');
//$obj->run_task('pp', 'b');
$obj->set_max_run(10);
$obj->run();
}?>

2, process management class

/**
* @copyright 2007 movivi
* @author   徐智   *
* $Id: getPage.php 11 2007-09-21 02:15:01Z fred $
* modify by bbs.it-home.org
*/
if (!defined('DIR_PHP_EXEC')) define('DIR_PHP_EXEC', 'php');
//if (!defined('DIR_MAIN_EXEC')) define('DIR_MAIN_EXEC', '');
if (!defined('DIR_TMP')) define('DIR_TMP', '');
/********/
/* 初始化 */
define('CMD_MAIN_PROCESS_KEY', 'main_process_key');
define('CMD_CHILD_PROCESS_NAME', 'child_process_name');
define('CMD_CHILD_PROCESS_PARAM', 'child_process_param');
function init_my_process() {
$GLOBALS['gal_obj_cmd'] = new my_cmd_argv();
$key = $GLOBALS['gal_obj_cmd']->get_value(CMD_MAIN_PROCESS_KEY);
$key = $key === false ? '' : $key;
$GLOBALS['gal_obj_process_m'] = new my_process_m($key);
if (!$GLOBALS['gal_obj_process_m']->is_main()) $GLOBALS['gal_obj_process_m']->run() ;
}
/**
* php multi-process class
*
* You need to inherit from this object and then implement your own run processing
*/
abstract class my_process_base {
public function __construct($auto_run=true, $name='') {
}
public function __destruct() {
       echo "@endn";
}
abstract public function run($param = null);
}

class my_cmd_argv {
private $cmd_argv = array();
public function __construct() {
       $argv = $_SERVER['argv'];
       for ($i = 1; $i < count($argv); $i++) {
         $cmd = explode('=', $argv[$i]);
         $this->cmd_argv[$cmd[0]] = isset($cmd[1]) ? $cmd[1] : '';
       }
}
public function get_key($key) {
       return isset($this->cmd_argv[$key]);
}
public function get_value($key) {
       return isset($this->cmd_argv[$key]) ? $this->cmd_argv[$key] : false;
}
}
/**
* PHP multi-process management class
* Multi-process processing can be implemented in PHP and can only be used in console mode
* The current signal implementation mechanism adopts file mode
*
*/
class my_process_m {
/**
 * @var array $task_list
 * Process list
*/
private $task_list = array();
private $lock_list = array();
private $lock = null;
private $is_main = false;
private $max_run = 3600000;
private function release_lock($key = null) {
       $lock = &$this->lock_list;
       if (!is_null($key)) {
         $key = md5($this->build_lock_id($key));
         if (isset($lock[$key])) {
            if (is_resource($lock[$key][0])) fclose($lock[$key][0]);
            unlink($lock[$key][1]);
            unset($lock[$key]);
         }
         return true;
       }
       foreach ($lock as $k => $h) {
         if (is_resource($h)) fclose($h);
         unset($lock[$k]);
       }
       return true;
}
private function release_task($key = null) {
       $task = &$this->task_list;
       if (!is_null($key) && isset($task[$key])) {
         if (is_resource($task[$key])) pclose($task[$key]);
         unset($task[$key]);
       } else {
         foreach ($task as $k => $h) {
            if (is_resource($h)) pclose($h);
            unset($task[$k]);
         }
       }
       return true;
}

private function build_lock_id($key) {
       return DIR_TMP . DIRECTORY_SEPARATOR . $key . '_sem.lock';
}
protected function run_child_process() {
       $class = $GLOBALS['gal_obj_cmd']->get_value(CMD_CHILD_PROCESS_NAME);
       $param = $GLOBALS['gal_obj_cmd']->get_value(CMD_CHILD_PROCESS_PARAM);
       $param = $param == '' ? null : unserialize(base64_decode(trim($param)));
       $obj = new $class();
       $obj->run($param);
       $this->task_list[] = $obj;
}
public function __construct($lock='') {
       if ($lock === '') {
         $this->is_main = true;
         $key = md5(uniqid()) . '_main.my_process';
         $lock = array($key, $this->get($key));
       } else {
         $this->is_main = false;
         $lock = array($lock, 0);
       }
       $this->lock = $lock;
}
public function __destruct() {
       $this->release_lock();
       $this->release_task();
}
/**
 * Stop all processes
 *
*/
public function stop_all() {
}
/**
 * Whether it is the main process
 *
*/
public function is_main() {
       return $this->is_main;
}
/**
 * Is there an active signal already?
 *
 * @param string $key
 * @return bool
*/
public function exist($key) {
       return file_exists($this->build_lock_id($key));
}
/**
 * Get a signal
 *
 * @param string $key
 * @param int $max_acquire The maximum number of blocked requests
 * @return mix If successful, return a signal ID
 *
*/
public function get($key, $max_acquire=5) {
       $fn = $this->build_lock_id($key);
       if (isset($this->lock_list[md5($fn)])) return false;
       $id = fopen($fn, 'a+');
       if ($id) $this->lock_list[md5($fn)] = array($id, $fn);
       return $id;
}
/**
 * Release a signal
 *
 * @param string $key
 * @return bool If successful, return a signal true
 *
*/
public function remove($key) {
       return $this->release_lock($key);
}
/**
 * Get a signal
 *
 * @param string $id signal ID
 * @param bool $block whether to block
*/
public function acquire($id, $block=false) {
       if ($block) {
         return flock($id, LOCK_EX);
       } else {
         return flock($id, LOCK_EX + LOCK_NB);
       }
}
/**
 * Release a signal
 *
*/
public function release($id) {
       flock($id, LOCK_UN);
}
public function run_task($process_name, $param=null) {
       $this->task_list[] = popen(DIR_PHP_EXEC . ' -f ' . DIR_MAIN_EXEC . ' -- '
         . CMD_CHILD_PROCESS_NAME . '=' . $process_name . ' '
         . CMD_CHILD_PROCESS_PARAM . '="' . base64_encode(serialize($param)) . '" '
         . CMD_MAIN_PROCESS_KEY . '="' . $this->lock[0] . '" ',
         'r');
}
public function run($auto_run = true) {
       if ($this->is_main) {
         $ps = &$this->task_list;
         $max_run = &$this->max_run;
         $id = 0;
         do {
            //echo "process-------------: n";
            $c = 0;
            foreach ($ps as $k => $h) {
                   $c++;
                   $msg = fread($h, 8000);
                   if (substr($msg, -5, 4) === '@end') {
                     echo "end process:[$k][$id] echo n{$msg} n";
                     $this->release_task($k);
                   } else {
                     echo "process:[$k][$id] echo n{$msg} n";
                   }
            }
            sleep(1);
         } while ($auto_run && $id++ < $max_run && $c > 0);
       } else {
         $this->run_child_process();
       }
}
public function set_max_run($max=1000) {
       $this->max_run = $max;
}
}
?>