I'm trying to replace some text with the use of str_replace and I'm not having any luck. I've looked at past postings and tried different combos and still can't get it to work. There are no error messages; the word just simply won't change to the new one.

PHP Code:
$query_getCalendar "SELECT * FROM chamber_calendar, months WHERE chamber_calendar.month_id = months.month_id ORDER BY chamber_calendar.year, months.month_id";
$getCalendar mysql_query($query_getCalendar$rcofcuser) or die(mysql_error());
$row_getCalendar mysql_fetch_assoc($getCalendar);
$totalRows_getCalendar mysql_num_rows($getCalendar);

$phrase "Ripon Chamber of Commerce presents the 27th Annual Main Street Day and Car Show in downtown Ripon on Saturday, October 15, 2011 starting at 9:00am to 3:00pm.";
$oldWord "Car Show";
$newWord "Car Shows";
$row_getCalendar str_replace($oldWord$newWord$row_getCalendar);