[An example of how to create a Windows service.  Evaluate code first and use at your own risk!]
<?php
//No timeouts, Flush Content immediatly
    set_time_limit(0);
    ob_implicit_flush();
    
//Service Settings
    $phpPath = "D:\\php\\php5.2.9";
    $ServiceName = 'phpServiceName';
    $ServiceDisplay = 'phpDisplayName';
//Windows Service Control
    $ServiceAction = "status";
    //$ServiceAction = "debug";
    if ( isset($_GET['ServiceAction']) and strlen($_GET['ServiceAction']) ) {
        $ServiceAction = addslashes($_GET['ServiceAction']);
    } else if ( isset($argv) and isset($argv[1]) and strlen($argv[1]) ) {
        $ServiceAction = $argv[1];
    }
    if( $ServiceAction == "status" ) {
        $ServiceStatus = win32_query_service_status($ServiceName);
        if ( $ServiceStatus['CurrentState'] == WIN32_SERVICE_STOPPED ) {
            echo "Service Stopped\n\n";
        } else if ( $ServiceStatus['CurrentState'] == WIN32_SERVICE_START_PENDING ) {
            echo "Service Start Pending\n\n";
        } else if ( $ServiceStatus['CurrentState'] == WIN32_SERVICE_STOP_PENDING ) {
            echo "Service Stop Pending\n\n";
        } else if ( $ServiceStatus['CurrentState'] == WIN32_SERVICE_RUNNING ) {
            echo "Service Running\n\n";
        } else if ( $ServiceStatus['CurrentState'] == WIN32_SERVICE_CONTINUE_PENDING ) {
            echo "Service Continue Pending\n\n";
        } else if ( $ServiceStatus['CurrentState'] == WIN32_SERVICE_PAUSE_PENDING ) {
            echo "Service Pause Pending\n\n";
        } else if ( $ServiceStatus['CurrentState'] == WIN32_SERVICE_PAUSED ) {
            echo "Service Paused\n\n";
        } else{
            echo "Service Unknown\n\n";
        }
      exit;
    } else if ( $ServiceAction == "install" ) {
    //Install Windows Service
        win32_create_service( Array(
            'service' => $ServiceName,
            'display' => $ServiceDisplay,
            'params' => __FILE__ . " run",
            'path' => $phpPath."\\php.exe",
        ));
        echo "Service Installed\n\n";
        exit;
    } else if ( $ServiceAction == "uninstall" ) {
    //Remove Windows Service
        win32_delete_service($ServiceName);
        echo "Service Removed\n\n";
        exit;
    } else if( $ServiceAction == "start") {
    //Start Windows Service
      win32_start_service($ServiceName);
      echo "Service Started\n\n";
      exit;
    } else if( $ServiceAction == "stop" ) {
    //Stop Windows Service
      win32_stop_service($ServiceName);
      echo "Service Stopped\n\n";
      exit;
    } else if ( $ServiceAction == "run" ) {
    //Run Windows Service
        win32_start_service_ctrl_dispatcher($ServiceName);
        win32_set_service_status(WIN32_SERVICE_RUNNING);
    } else if ( $ServiceAction == "debug" ) {
    //Debug Windows Service
        set_time_limit(10);
    } else {
        exit();
    }
//Server Loop
    while (1) {
    //Handle Windows Service Request
        usleep(100*1000);
        if ( $ServiceAction == "run" ) {
            switch ( win32_get_last_control_message() ) {
                case WIN32_SERVICE_CONTROL_CONTINUE:
                    break;
                case WIN32_SERVICE_CONTROL_INTERROGATE:
                    win32_set_service_status(WIN32_NO_ERROR);
                break;
                case WIN32_SERVICE_CONTROL_STOP:
                    win32_set_service_status(WIN32_SERVICE_STOPPED);
                    exit;
                default:
                    win32_set_service_status(WIN32_ERROR_CALL_NOT_IMPLEMENTED); 
            }
        }
    //User Loop
        sleep(1);
        echo "\n<BR>YOUR CODE HERE";
    }
//Exit
    if ( $ServiceAction == "run" ) {
        win32_set_service_status(WIN32_SERVICE_STOPPED);
    }
    exit();
?>