round is available since version 1.0.
Prototype:
number round(number val [, number precision=0])
Parameters
val
the value to be rounded
Description:
Get the rounded value of val to specified precision (number of digits after the decimal point). precision can also be negative or zero (default).
Return value:
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
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); // 5.05
echo round(5.055, 2); // 5.06