example
$phrase = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array("fruits", "vegetables", "fiber");
$yummy = array("pizza", "beer", "ice cream");
$newphrase = str_replace($healthy, $yummy, $phrase);
my new code.
$suburb_db = $line_suburb["suburb_name"];
$whitspace = array("");
$replace = array("%20");
$upp_subb = str_replace($whitspace , $replace , $suburb_db);
<a href="house.php?suburb=<? echo strtoupper $upp_subb; ?>&nav=ss&order=price" class="body">
id this ok.