Goes like that:

class myclass {
   var $myarr = array();
   function myclass() {
     $this->myarr[test] = 1; // works here
     $this->myfunc();
     $this->another();
   }
   function myfunc() {
     $this->myarr[test1] = 1; // doesn't work here
   }
   function another() {
     reset($this->myarr); // SIGSEGV here
     foreach($this->myarr as $k => $val) {
     } // either a warning about $this->myarr not being an array or SIGSEGV (same in constructor);
   }