Passing variables from page to page

I made this form in the "index page"

and when i did : echo $ days it in the "search_results.php" page ,it was ok

Now i have made another form in the "search_results.php"

and in the "continute.php"
i calculated the sum of the checkboxes selection
but my problem now is:
i want to compare between the $days in the "index.php " and the $sum of the checkboxs selection
but each time i try to echo $days in the "contniue.php" it deosnt seem to see it
why???

 

Let me tell you first that you need to read a good tutorial about passing variables with php, I don't wanna scare you now.

well... try this

echo "<form action='calculate.php' method='post'>";
while($record=mysqli_fetch_assoc($result)){
$days_db=$record['days'];
echo "<input type='checkbox' name='choose[]' value='{$days_db}' />";
echo "<input type='hidden' name='days' value='$days' />";
echo "<input type='submit' name='submit' value='Continue'>";
echo "</form>";

PHP:

 

thnxxxx it worked

 

but please i have another problem in mysql query

my select is

i have records conatins :5,10,15 days
every time i choose +/-7 days which has the values 7
it gives me 0
and when i select +/14 which has the value 14
its gives me the days 5,15
and when i select +/-21
its gives me the days 5
why????????
i think mysql query contains something wrong ???

 

Is the days field in your database set to an Int?

 

Ok tthnxxxx
i was putting it as varchar in my database and when i changed it to int
it worked just fine
thnxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx