note 78814 deleted from function.round by danbrown
| From: | danbrown@php.net | Date: | Sun, 17 May 2009 16:17:00 +0000 |
| Subject: | note 78814 deleted from function.round by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-154784@lists.php.net to get a copy of this message | ||
Note Submitter: KingIsulgard
----
[quote]I'm sure its been done before, but here's my example of a round up function.
This function allows you to specify the number of decimal places to round up to.
Eg, when rounding up to 3 decimal places, this function adds 0.0005 to the original value and
performs round(), or for 6 decimal places, adds 0.0000005 and performs round(), etc...
Hopefully some of you will find it useful:
<?php
function roundup ($value, $dp)
{
// Offset to add to $value to cause round() to round up to nearest significant digit for
'$dp' decimal places
$offset = pow (10, -($dp + 1)) * 5;
return round ($value + $offset, $dp);
}
?>
Please post if you have any comments or improvements on this :-) [/quote]
This can be much more efficient:
<?php
function roundup ($value, $dp)
{
return ceil($value*pow(10, $dp))/pow(10, $dp);
}
function rounddown ($value, $dp)
{
return floor($value*pow(10, $dp))/pow(10, $dp);
}
?>
Much cleaner, isn't it ;)?