Use string to store statement (or part of a statement), and then add it to the code
I use multidimensional arrays to store product attributes (well Virtuemart does, to be precise).
When I tried to echo the sub-arrays value, if the sub-array did not exist PHP threw:

> Fatal error: Cannot use string offset
> as an array

To get around this, I attempted to create a function to check on every array level if it is an actual array, and if it is empty (when trying on the whole thing at once such as: `is_array($array['level1']['level2']['level3'])`, I got the same error if `level1` or `level2` are not actual arrays).

This is the function (`$array` contains the array to check, `$array_levels` is an array containing the names of the sub-arrays, in the order they should apper):
	

	function check_md_array($array,$array_levels){
		if(is_array($array)){
			$dimension = null;	//This will store the dimensions string
			
			foreach($array_levels as $level){
				$dimension .= "['" . $level . "']";	//Add the current dimension to the dimensions string
				
				if(!is_array($array/* THE CONTENT OF $dimension SHOULD BE INSERTED HERE*/)){
					return false;
				}
			}			
			return true;
		}
	}

How can I take the string contained in $dimensions, and insert it into the code, to be part of the statement?
Use string to store statement (or part of a statement), and then add it to the code
===

I use multidimensional arrays to store product attributes (well Virtuemart does, to be precise).
When I tried to echo the sub-arrays value, if the sub-array did not exist PHP threw:

> Fatal error: Cannot use string offset
> as an array

To get around this, I attempted to create a function to check on every array level if it is an actual array, and if it is empty (when trying on the whole thing at once such as: `is_array($array['level1']['level2']['level3'])`, I got the same error if `level1` or `level2` are not actual arrays).

This is the function (`$array` contains the array to check, `$array_levels` is an array containing the names of the sub-arrays, in the order they should apper):
	

	function check_md_array($array,$array_levels){
		if(is_array($array)){
			$dimension = null;	//This will store the dimensions string
			
			foreach($array_levels as $level){
				$dimension .= "['" . $level . "']";	//Add the current dimension to the dimensions string
				
				if(!is_array($array/* THE CONTENT OF $dimension SHOULD BE INSERTED HERE*/)){
					return false;
				}
			}			
			return true;
		}
	}

How can I take the string contained in $dimensions, and insert it into the code, to be part of the statement?