note 69500 deleted from ref.bc by colder
| From: | colder@php.net | Date: | Thu, 07 Sep 2006 23:39:22 +0000 |
| Subject: | note 69500 deleted from ref.bc by colder | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-116883@lists.php.net to get a copy of this message | ||
Note Submitter: jrf at NOSPAM dot jokeaday dot net
Reason: in docs
----
BEWARE !
The bcmath functions do not abide by the normal rounding rules, but 'cut off' your string
at the digit specified by precision.
<?php
$x = '0.00016132';
print bcadd( $x, 0, 4 ); // add 0 to try and round off the number at 4 digits
printf( '%01.4f', round( $x, 4 ) ); // this does work
printf( '%01.4f', $x ); // this works too - round() is not needed as (s)printf will round
automatically
?>
results in:
0.0001 // incorrect
0.0002 // correct
0.0002 // correct