PHP passing date to SQLServer - php

Question

I have the following SQL procedure which works on SQL Server Management studio when I execute it
USE [DatabaseName]
GO
DECLARE #return_value int
EXEC #return_value = [dbo].[getRegisterSummaryReport]
#registerID = -1,
#StartBusinessDate = '1900-01-01 00:00:00',
#EndBusinessDate = '3000-01-01 00:00:00'
SELECT 'Return Value' = #return_value
GO
what I want now is to pass the StartBusinessDate and the EndBusinessDate from a PHP function ( sorry I'm very new to PHP) .
here's what I had but for some reason I get false as a respond ( I think I'm not using the proper way to pass the date to my SQL Server).
public static function getRegisterSummary($registerId, $startBusinessDate, $endBusinessDate, $dbConnection){
$date_start = '1900-01-01 00:00:00';
$date_end = '3000-01-01 00:00:00';
if($startBusinessDate == "") $startBusinessDate = date('Y-m-d G:i:s', $date_start); // if startBusinessDate is "" I want the replace it with date_start
if($endBusinessDate == "") $endtBusinessDate = date('Y-m-d G:i:s', $date_end);
$sql = "exec [database1].[dbo].[getRegisterSummaryReport] #registerId = {$registerId}, #startBusinessDate = '{$startBusinessDate}', #endBusinessDate = '{$endBusinessDate}'";
$results = $dbConnection->query($sql);
if($results){
return $results;
}
return false;
}
Thank you

Answer 1

Ok This is embarrassing!!
first of all I changed the syntax to this
if($startBusinessDate == "") $startBusinessDate = date('1900-01-01');
if($endBusinessDate == "") $endBusinessDate = date('3000-01-01');
for some reason this worked with me and passed the correct value unlike when I added
date('Y-m-d G:i:s', $date_start);
Also I made a mistake in
if($endBusinessDate == "") $endtBusinessDate = date('Y-m-d G:i:s', $date_end);
I added t after $endtBusinessDate :(