Remove trailing zeroes 1

[rrsub]

Is there a function that I can't find that will remove trailing zeroes from a number with a decimal?

I can't find one so I'm creating one now

 

[ericbrunson]

look at the printf options. %.2d or something like that should do what you need.

 

[rrsub]

Thanks ericbrunson for pointing me but this is exactly what I wanted.

<?PHP
function cutzero($value) 
{
   return preg_replace("/(\.\d+?)0+$/", "$1", $value)*1;
}
?>

 

[sleipnir214]

The PHP manual recommends not using regular expression functions where not necessary. The regular expression functions are resource-intensive.

<?php

function cutzero ($value)
{
	return (int) $value;
}

$a = 12345.000000;

print cutzero ($a);
?>

Want the best answers? Ask the best questions!

TANSTAAFL!!

 

[rrsub]

The regular expression does give me decimal places which I need.

I'm working with page sizes and when I convert points to inches, I get values like 8.5000000068 which I only need 8.5, not 8.50 or 8.500. There are times I will need 6.125 or 6.15 but not 6.150. If I get 11.000, I only want 11 and not "11."

 

[rrsub]

Would it be better to have a loop that removed the trailing zero instead of regular expressions?

 

[sleipnir214]

I can't way which of a loop or a regular expression would be less resource-intensive. But I'd guess the loop.

What's wrong number_format()?

<?php
$a = 8.5000000068;
$b = number_format ($a, 1);

print $b;
?>

Outputs:

8.5

Just keep in mind that number_format() rounds. Had $a been equal to 8.560000, my script would have output "8.6".


Want the best answers? Ask the best questions!

TANSTAAFL!!

 

[rrsub]

I use number_format to get the 3 decimal places.

8.124669 is fine as "8.125"

What I don't want is "8.500" but "8.5"
If I get "8.125" I need "8.125" not "8.1"
If I get "6.250" I need "6.25" not "6.250" or "6.3"
If I get "11.000" I want "11" not "11.000"

Is there a way I can test the stress the difference of the loop vs a regex?

 

[sleipnir214]

Try rtrim():

<?php
print '<pre>';
$a = array (8.500, 8.125, 6.250, 11.000);

foreach ($a as $b)
{
	print rtrim ($b, '.0');
	print "\n";
}
?>

Outputs:

8.5
8.125
6.25
11

If you want to test a loop against a regex, write two scripts and compare runtimes using microtime()


Want the best answers? Ask the best questions!

TANSTAAFL!!

 

[rrsub]

That's it!!!

 

[ericbrunson]

In the interest of preciseness, if we go back to the original question... you don't have a decimal, you have a string representation of a decimal. Removing the zeros from a string is a completely different problem than removing the zeros from a number.

 

[rrsub]

Either way to fix the problem didn't really matter to me. It seems logical to handle it as a number instead of a string.

But, another problem crept up;

If the number is "10", 1 is returned.

I'll work on that tomorrow.

 

[ericbrunson]

Exactly.

 

[Olavxxx]

what if you search for "." in reverse, with strrpos() and do a trim on that?

eg:

$decimals = 3;
$blah = substr(strrpos($blah, ".") + $decimals, strlen($blah));

ps. this code might be wrong, I have not tested it.
There may also be some performance issues that I am not aware of, but try the microtime() as suggested above, to test what is the fastest way to go!

good luck!