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).
Example 1. round() examples <?php
echo round(3.4); // 3
echo round(3.5); // 4
echo round(3.6); // 4
echo round(3.6, 0); // 4
echo round(1.95583, 2); // 1.96
echo round(1241757, -3); // 1242000
echo round(5.045, 2); // 5.04
echo round(5.055, 2); // 5.06
?> |
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| Caution |
When rounding on exact halves round() rounds down on
evens and up on odds. If you want to always force it in one direction
on a .5 (or .05 in your case) add or substract a tiny fuzz factor. The
reason behind rounding half the values down and the other half up is to
avoid the classical banking problem where if you always rounded down
you would be stealing money from your customers, or if you always
rounded up you would end up over time losing money. By averaging it
out through evens and odds you statistically break even.
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Note:
The precision parameter is only
available in PHP 4.
See also ceil(),
floor() and
number_format().
