php question (user rating)

[ascanio]

hi i'm trying to make a user rating so the user can vote others users like the  Karma system in this forum

i'm a newbie in php but i have almost finished

i have this code

Code: [Select]

$total = $vote_a+$vote_b+$vote_c+$vote_d+$vote_e;
$sum = round(((($vote_a*1)+($vote_b*2)+($vote_c*3)+($vote_d*4)+($vote_e*5))/$total)*2 , 2);

but when the $total is cero i get this error

Warning: Division by zero in /home/ascanio/domains/girlsandgirls.net/public_html//index.php on line 66

what can i do?

[Vincent]

just thinking
$sum = round(((($vote_a*1)+($vote_b*2)+($vote_c*3)+($vote_d*4)+($vote_e*5))
$sum1 = if $sum =< 0 then 0    else sum/(sum*2 , 2);

not sure if it is possible 

just i mean add what you have to add than check if it is > 0 then calculate!

vincent 

[ascanio]

thank but i get this
Parse error: parse error, unexpected T_IF

[Vincent]

 
i think so - it was only a path i showed - not a finished code!

i think the problem was 0 / x = error
so you add as much you like then check if > 0 then you calculate

sincerly
vincent

[ascanio]

sorry i don't know how to do it 

[TheOracle]

How about posting the whole index.php file since it seems to involve bigger modifications to get this MOD to work ?

[V@no]

if ($total)
{
  $sum = round(((($vote_a*1)+($vote_b*2)+($vote_c*3)+($vote_d*4)+($vote_e*5))/$total)*2 , 2);
}
else
{
  $sum = 0;
}

[ascanio]

thanks

[V@no]

btw, basic algebra, red = not needed :

((($vote_a*1)+($vote_b*2)+($vote_c*3)+($vote_d*4)+($vote_e*5))/$total)*2

[ascanio]

ok thanks, i'm learning ..  i did that just to make sure

[cipriansamoila]

How do you rate an image the following way:

Do you like this image? Yes or No?

A pro / contra system.

I tried changing the values to yes and no, and the database to accept varchar instead of integer, but there is still some code in counting the votes.

In the end, I want to count how many yes and how many no are for each image.

Thanks.
Cip