noobie question about variable types.

[joyser]

ok, i have two varibles.. this is my statment:

$hours = $hours-$time_change;

$hours = 15 and $timechange = 8. However when i echo the result, i get this:

15-8

why is this? is it something to do with variable type? if so, how do i fix it?

[npsari]

I think the problem may be with the Quotation marks

Or the fact that you chose the variable hours 2 times

 

 

just change it to...

 

$result = $hours - $time_change ;
echo "$result";

[joyser]

nope, still doesn't work

[phpdragon]

I cannot repeat your issue, here is the code I am using and this works fine

 

<?php $hours=15; $time_change=8; $hours=$hours-$time_change; echo $hours; ?>

 

is yours similar?

[joyser]

thanks for replying guys my code is like this:

$hours = substr($timestamp, 9, 2);

($timestamp is a big long string with date and time etc.)

$hours = $hours-$time_change;

[npsari]

hmm, so, are you sure if you echo $hours and $time_change they will be simple numbers

Because if they are simple numbers, then, i think there should be no problem

 

Perhaps you need to show the whole script from start to end for better help

[phpdragon]

echo your 2 variables to the page with no calculations and see what it lists

[linkednet]

I read the PHP Manual for substr, this is what I understand. Straight from PHP.net.

http://us3.php.net/substr

 

string substr  ( string $string  , int $start  [, int $length  ] )

Returns the portion of string  specified by the start  and length  parameters.

 

$rest = substr("abcdef", -3, 1); // returns "d"

It basically starts between c and d and counts 1.

 

$timestamp = 2/22/09

$hours = substr($timestamp, 3, 2);

$hours = $hours - $time_change;

echo $hours;

 

It will print: 2/