Re: [PHP] dynamic/multidimensional arrays in classes

[James Holden]

$this->$arr[] 

should be

$this->arr[] 

You are using a variable defined within the class - since it is a class variable you can reference it as you would anything else within the class, using '$this->'





Patrick Teague wrote:

I'm having problems figuring this out.  This first way gives me a 'Fatal
Error: Cannot use [] for reading in class.php on line xx'
class myClass
{
  var $arr = array();
  function add_something( $value )
  {
     $this->$arr[] = $value;      // this is the line causing the error
  }
}
I've also tried using count() to find out how many items are in $arr, but it
keeps saying that $r == 0...  i.e.
function add_something( $value )
{
  $r = count($arr);
/*
  if( is_null( $r )
  {
     $r = 0;
  }
*/
  //print( $r );
  $this->$arr[$r] = $value;
}
I've tried this both with & without the commented section & still $r = 0
even if you use '$class->add_something("my value");' 50 times.  I'm guessing
once this problem is solved it will work for multidimensional arrays as
well?
Patrick



 





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