[TYPO3] EXT programming question

[Rocky]

Hey,

In my EXT, I'm listing the records from an external Database table. 
Below are the code I'm using.

/------------------snip begin--------------/
	foreach ($compr as $key=>$value){
		  $content='
                          <h5>Hello, World!</h5>
                          <p>'.$key.':'.$value.'</p>
';}

/------------------snip end---------------/

It only print out the last array item.

but with the same DB connection the following codes gives me all the items

/----------snip begin---------------/
foreach ($compr as $key=>$value){
	echo $key."as".$value;	
}
/-----------snip end-------------/

The problem is this is not the typo3 way of out puting the content. Can 
any of you give a hint on how to show the array items using $content 
varable in EXT's class file please?

Thanks in advance!
Rocky