multithreading - PHP thread don't work -

i use php_thread multithreading. http://php.net/manual/en/class.thread.php

installation successful got bad result

my code here :

<?php  class workerthread extends thread { public function __construct($i){   $this->i=$i; }  public function run(){     ($i=0; $i < 3; $i++) {          echo "thread-".$this->i."=>".$i."<br/>";     } } }  for($i=0;$i<2;$i++){ $workers[$i]=new workerthread($i); $workers[$i]->start(); }   ?> 

result:

thread-0=>0 thread-0=>1 thread-0=>2 thread-1=>0 thread-1=>1 thread-1=>2 

the function not realize "multithreading". ?

avoid having echo in run function. can generates bugs , stuck workers in infinite loops.

let threads come join(). there, retrieve datas , have echo.