Dominos Slot Machine Player

dominos.sh

#!/bin/bash
#Play a single round on http://pizzaonline.dominos.co.in/slot-machine/ to get your session_id
until php test_result.php; do
curl -s -H "X-Requested-With:XMLHttpRequest" -X POST -d "session_id=$1" http://pizzaonline.dominos.co.in/slot-machine/process-slot.php -o result.json
done;

test_result.php

<?php
$json=json_decode(file_get_contents('result.json'));
if(isset($json->coupon_description)){
	$description_end_position=strpos($json->coupon_description,'!');
	$description = substr($json->coupon_description,0,$description_end_position);
	echo $json->unique_coupon." - ".$description."\n";
	$i=$json->slot_result_position;
	if($i[0]==$i[1]&&$i[0]==$i[2]&&$i==[3])
		exit(0);
}
exit(1);

line 8 missing a $i

should be if($i[0]==$i[1]&&$i[0]==$i[2]&&$i==$i[3])