rounding down in php

[giantpanda]

I've look all over the intraweb for a php tutorial that might have some idea about what i need.
I wan't to know if it's possible to round down to the nearest interval of 20 in just php.

anyone know how

[ListenToMyMusic]

yes
<?
echo round(3.123456789012345678905, 20)
?>

makes
3.12345678901234567891

or

echo round(123456789012345678901, -20)

makes

100000000000000000000

whichever you need

or to always round down use this

<?php
function round_down($value)
{
if(is_float($value))
{
$exploded = explode(".",$value);
return $exploded[0];
}
else
{
die("Only float values can be entered.");
}
}
?>

that should help, I may be wrong, so ask others to confirm

[henke37]

floor and ceil forces the rounding direction to be up and down.