Hi,
I'm working with floats because I have a big number to identify users, and the
only operation I make with this number is to add something less than
10000000000 with 10000000000 (one and ten zeros). Besides that I just need to
use the number to search ("=" comparison). I never need the fractional part of
the number. As I said, I only use float and not int because of the size of the
number.
I noticed PHP uses the number in exponential notation sometimes, this happened
with both: 4100000 + 10000000000 and 4153154 + 10000000000. I'm using
ctype_digit() to check when this happens. Is there a way to avoid that so that
PHP always uses the decimal notation?
(The focus on my code is not to generate the new user id, I just need to
generate it to do other things. Almost all my functions need to generate the
new user id, as we cannot map the old user ids to the new user ids. I'm putting
two systems together, at least for now, I need to use the old user id from 1
external source and generate the new user id to operate user records on another
external db.)
----- code -- (receives "old" user id, and changes to the new format)
$_SESSION['some_array']['old_user_id'] = $userinfo[0]; // I got the number from
DB. Say. 4153154..
$checking_old_user_id = (string)$_SESSION['some_array']['old_user_id'];
// So I can use ctype_digit()
$_SESSION['some_array']['new_user_id'] = (float)10000000000 +
$userinfo[0];
$checking_new_user_id = (string)$_SESSION['some_array']['new_user_id'];
$_SESSION['some_array']['foo'] = $userinfo[1]; // Other data
if( ctype_digit($checking_old_user_id) == false ) { // Exponential
notation detected
echo 'some message';
return false; // Script stops!
}
if( ctype_digit($checking_new_user_id) == false ) { // Exponential
notation detected
echo 'some message';
return false;
}
if($_SESSION['some_array']['old_user_id'] < 0) { // Filter input
echo 'some message';
return false;
}
if($_SESSION['some_array']['new_user_id'] < 0) { // Filter input
echo 'some message';
return false;
}
----- code
Any ideas, suggestions? I would like to make php stop using the exponential
notation so I don't need to bother with these checkings.
thanks.
=
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