This a php syntax error, try:
foreach($last_updated_comment as $key => $last_comment_date){
print_r( $last_comment_date );
echo "<br /><br />";
}
This a php syntax error, try:
foreach($last_updated_comment as $key => $last_comment_date){
print_r( $last_comment_date );
echo "<br /><br />";
}