PHP floor (), round (), Ceil ()

//Down rounding: Gets the nearest integer less than $val
Echo  Floor(4.3);//4Echo  Floor(9.999);//9Echo  Floor(-3.14);//-4Echo  Floor(-0.1);//-1//Rounding, second parameter is precision (can be negative)Echo round(0.1);//0Echo round(-3.6);//-4Echo round(-1.95583, 2);//-1.96Echo round(1.95583, 2);//1.96Echo round(1241757,-3);//1242000Rounding up: Gets the most recent integer greater than $valEcho Ceil(-0.1);//0Echo Ceil(0.1);//1Echo Ceil(5.1);//6Echo Ceil(-3.1);//-3


Note: The result values returned by the above three functions are float float type, so be careful with the accuracy problem. 

PHP floor (), round (), Ceil ()