Strange problems with PHP4 (OOP)

[olegk]

This code prints out "AB", and it should print out "AA". What's wrong with me?

PHP 4.4.2

<?php

class test
{
  var $a="";
  var $b="";
  function testfunc()
  {
      $this->$a="A";
      echo $this->$a;
      $this->$b="B";
      echo $this->$a;
  }
}

$t=new test;
$t->testfunc();

?>

[sanfly]

[quote]function testfunc()
  {
      $this->$a="A";
      echo $this->$a;
      $this->$b="B";
      [color=red]echo $this->$a;[/color]
  }[/quote]

should the line in red be:

[code]echo $this->$b;[/code]

[olegk]

[quote author=sanfly link=topic=106006.msg423695#msg423695 date=1156808950]
...
should the line in red be:
...
[/quote]

No, that's the point. If it were $this->$b, I would expect the code to print "AB", but I print out $this-$a twice, and for some reason the second time it turns into "B"

[drkstr]

This might be with PHP 5, but I think you need to access your vars with:

[code]      $this->a="A";
      echo $this->a;
      $this->b="B";
      echo $this->a;
[/code]
regards,
...drkstr

[wildteen88]

To access your vars that is in the same class/function you need to use $this->[b]youVarNameHere[/b] just as drkstr pointed out above. This is the same for PHP4 and PHP5.
You do not put the dollar sign after $this-> you just the name of the variable, ie $this->a

[Jenk]

Is there any reason you didn't take this answer from the other forum you posted this on?