<?php
# ERROR GLOBAL VARIABLES IMPORT

$tester=true;

function tester(){
 global $tester;
 var_dump($tester);
}

tester(); // PRINT -> bool(true)

class test extends Thread{
 public function run(){
  global $tester;
  tester(); // PRINT -> NULL
 }
}
$workers=new test();
$workers->start();

?>