round down a decimal

[freakystreak]

A quick one this. How can I round down a decimal number for example: 0.305 to 0.30 with php? Using round($var) just rounds up.

[cpradio]

Read the Manual pages

round(0.305, 2, PHP_ROUND_HALF_DOWN); 

[freakystreak]

thanks but I get an error : Warning: Wrong parameter count for round().

[cpradio]

What version of PHP are you using? You need to be using at least 5.3 for the third parameter to be handled.

[freakystreak]

What version of PHP are you using? You need to be using at least 5.3 for the third parameter to be handled.

Ah 5.2.4, developing on WAMP so I guess I need to update. Is there a way to accomplish this without upgrading?

[cpradio]

The only way I can think of (and this is a hack) is

$value = floor(.305 * 100) / 100; // multiply by 100 so you get 30.5, then use floor() to drop the decimal place, then divide by 100 to get .30 or .3
var_dump($value); 

[freakystreak]

Cheers, will try that now. And.... worked a treat. Many thanks.