Re: References challenge with PHP4

Lluis Pamies wrote: > I've the following code: > > 1 <?php > 2 > 3 class B { > 4 function B(&$a) { > 5 $this->a = &$a; > 6 } > 7 > 8 function run() { > 9 print "{$this->a->msg}\n"; > 10 } > 11 } > 12 > 13 class A { > 14 function A() { > 15 $this->b = new B(&$this); > 16 } > 17 > 18 function &getInstance() { > 19 static $inst; > 20 if(!isset($inst)) $inst = new A(); if(!isset($inst)) $inst =& new A(); > 21 return $inst; > 22 } > 23 > 24 function run() { > 25 $this->b->run(); > 26 } > 27 } > 28 > 29 $a = &A::getInstance(); > 30 $a->msg = "Hello world !"; > 31 > 32 // Some tasks, flow control, scope changes, ... > 33 > 34 $a = &A::getInstance(); > 35 print "{$a->msg}\n"; // This should print "Hello world !" > 36 $a->run(); // This should print "Hello world !" > 37 > 38 ?> > > My problem is that I don't know what I need to do in order to print > the same value in lines 35 and 36. Line 35 prints "Hello world !", but > in the 36 nothing appears. What I'm doing wrong ? > > Thanks for all ! >