Help: don't understand what php does!!!

Anon

Hello, Here is my script...

echo gettype($minimum).'<->'.gettype(($number)).'<br>';
ECHO $number.' >= '.$minimum.' ? -> ';
IF ($number >= $minimum) {
echo 'oui <br>';
RETURN('1');
} ELSE {
echo 'non<br>';
RETURN('0');
};
};

If $number > $minimum => no problem :o)
If $number < $minimum => no problem :o)
If $number = $minimum => problem for numbers terminating by .3 or .8. Ex: 1.3, 1.8, 2.3, 2.8, 3.3, 3.8,... For other numbers, it is ok.

I really don't understand.

Can someone help me?

I've this problem with php4 under win and linux.

Thanks, I really need help.

Seb

Anon

What is the problem exactly?

Anon

Thank you Vincent,

By using the script shown in the first message 2.3 (=$number) seems to be not equal to 2.3($=minimum)

Can you try the script by setting $number and $minimum to 2.3. You'll then understnad.

It is an urgent problem because I've just launched my site (www.delcampe.com) and there is many traffic on it.

Thank you :o)

Seb

Anon

You're probably seeing floating-point rounding errors.
Be leery about making exact comparisons between
floating-point numbers.

Anon

Another example...

Here follows a script of mine which is functionnal. The bug in it is minor but important to resolve asap for me.

The goal of this script is to add a duration to a starting date. You'll see that after some days, it is 1 hour late!!!

Can some one copy/paste and test this script and help me. I'm searching for now a week and really don't find what to do.
<?

$duration = 28;
$date_begin = date("Y-m-d H:i:s");
$date_end_long = MKTIME(DATE("H"), DATE("i"), DATE("s"), DATE("m"), DATE("d"), DATE("Y"));
FOR ($i = 0; $i < ($duration + 1); $i = $i + 1) {
$date_end_long = ("$date_end_long" + (24 60 60));
$date_end = DATE("Y-m-d H:i:s", $date_end_long);
ECHO $date_begin . " -> " . $date_end . " (".$i." days)<hr>";
};

Anon

Is the duration always in days? You can just do the following:

$duration = 28;
$date_begin = date("Y-m-d H:i:s");
$date_end = date("Y-m-d H:i:s",mktime(date("H"),date("i"),date("s"),date("m"),date("d")+$duration,date("Y")));

---JH

Anon

Thank you John, it works wonderful.

What I've seen is that a bug in php?

Thanks again, Seb

Anon

I doubt it's a bug, probably just a flaw in your logic. I never really followed it, I just came up with a different way because what you were doing looked confusing.

Glad I could be of help, make sure you're reading those manuals.. 🙂

---JH