1.0, 1.5, 2.0, 2.5, 3.0, 3.5 ... display as 1, 1.5, 2, 2.5, 3, 3.5 ...

searain

say $number could be 1.0, 1.5, 2.0, 2.5, 3.0, 3.5 ... I want to display as 1, 1.5, 2, 2.5, 3, 3.5 ...

I use this small trick to do the work.

<?php echo($number*10/10); ?>

It is very simple. But it is kind tricky, in case new php version change the way handling number, it might not work in the future. Plus, it might not be clear to other programmers.

Is there a good clear function I can use to do the above works? thanks!

Weedpacket

[man]round[/man]?

searain

no. round(1.5) will be 2, right?

I want 1.0 to be 1, 1.5 to be 1.5, 2.0 to be 2 and 2.5 to be 2.5 etc.

justsomeone

If these are integers, just printing them should do the trick. By default, IIRC PHP will display exactly as you want.

Otherwise, look into printf()

Weedpacket

[man]round[/man]. Read the page again.

EWaveDev

I've been writing php for a year and and with what I've seen with the same SQL Server database and service pack on 4 different machines with the same versions of Apache and php. Three stand alone development machines (yes, I develop code for the same web site in three different places) and one that is on a network. And with what I have seen over the last 20+ years working on different projects.

I understand your preference for 1, 1.5, 2, 2.5 etc. I prefer it also. However, just because it works right on machine A doesn't mean you get the same thing on machine B. With my current project, I have a page that simply retrieves values from a database table and displays them for the user; code works fine on two of the development machines integers displayed as integers using
<td><?php echo "$Value"; ?></td>
The 0.85 retrieved from the database displayed as 0.85, 1 displayed as 1 and 0 displayed as 0. However, on one of the development machines and on the production box, that 0.85 turned into 0.85000000000000000865583! So it became
<td>
$X = rtrim(sprintf('%5.2f', $Value), '0');
echo "$X";
</td>

This works for me.

searain

EWaveDev wrote:
I understand your preference for 1, 1.5, 2, 2.5 etc. I prefer it also. However, just because it works right on machine A doesn't mean you get the same thing on machine B.

I know float will be different on different machine or database server. But these are decimal numbers from database. and the decimal set up is (3,1), 1 digit after decimal point.

Decimal numbers should work pretty consistent, right? These are decimal so I can search the database easily. But when I display them, I don't want 1.0, 2.0, 3.0 ... I want 1, 2, 3 ...

searain

justsomeone wrote:
If these are integers, just printing them should do the trick. By default, IIRC PHP will display exactly as you want.

Otherwise, look into printf()

They are decimal numbers from database, with 1 digit after decimal point. But for 1.0, 2.0, 3.0 etc. I want to be displayed as 1, 2, 3 ...

searain

Weedpacket wrote:
[man]round[/man]. Read the page again.

Reading again. Cannot figure out how round can help me here. Could you give a little more hints? Thanks!

Weedpacket

round

(PHP 3, PHP 4, PHP 5)
round -- Rounds a float
Description
float round ( float val [, int precision] )

Returns the rounded value of val to specified precision (number of digits after the decimal point). precision can also be negative or zero (default).

Oh, look. It has a second parameter to specify precision. So I wonder what happens if you try something like - oh, I don't know - "round('5.5',1)" or "round('1.0', 1)"?

Of course, I don't really know what your problem is here. I mean, unless you're worried that PHP's developers will change the definition of * and / so that they do something other than multiplication and division. Do you think they might change the definition of + so that it does something other than addition? If not, then you could just go echo 0+$number. If that's too shaky, then I guess a straight cast like echo (float)$number would be also.

xblue

Weedpacket, I understand what searain wants to achive is exactly the other way round, no displaying 2 as 2.0 (which round or number_format seem to be suitable for) but displaying 2.0 as 2 while 2.5 stays 2.5.

I agree that this is the way PHP would handle it be default, but not if e.g. you deal with string, and you could not do it by explicit casting to either float or int. Maybe some type juggling could be employed?

// there may be more elegant ways though ...
$num1 = "2.0";
$num2 = "2.5";

$num1 += 0;
$num2 += 0;

echo $num1."\r\n";
echo $num2;

Weedpacket

xblue wrote:
Weedpacket, I understand what searain wants to achive is exactly the other way round, no displaying 2 as 2.0 (which round or number_format seem to be suitable for) but displaying 2.0 as 2 while 2.5 stays 2.5.

Yes, I do understand that. I also included your solution in that post. But you must remember that "+" is just as likely to change its meaning in the future as "*", and that's what serain's worried about.

awesome_aims

<?php
$number = str_replace(".0", "", $number);
?>

madwormer2

Lol, he has a point

surfchen

$number=rtrim($number,'.0');