round

 float round ( float $val [, int $precision = 0 [, int $mode = PHP_ROUND_HALF_UP ]] ) 

説明

Returns the rounded value of val to specified precision (number of digits after the decimal point). precision can also be negative or zero (default). Note: PHP doesn't handle strings like "12,300.2" correctly by default. See converting from strings.

戻り値

The rounded value