The use of rounding round rounding, rounding up, rounding down, and fractional interception in PHP Division operations

This article mainly introduces the PHP division operations rounded rounding, up rounding, down rounding, the use of fractional interception, has a certain reference value, now share to everyone, there is a need for friends can refer to

PHP takes integer functions commonly used in four ways:
1. Direct rounding, discarding decimals, preserving integers: intval ();
2 Rounding and Rounding: round ();
3. Rounding up, there are decimals on the addition of 1:ceil ();
4. Rounding Down: Floor ().

First, intval-the variable into an integer form
Intval If the character type is automatically converted to 0, it is usually used to cast a numeric type, but it is important to note that it is recommended to use (int) if the length is too long.

Intval (5.2);  5intval (5.6);  5intval (' abc '); 0

Second, rounding: round ()
The parameter 1 is rounded according to the specified precision of parameter 2. The parameter 2 can be a negative number or 0 (the default).

Round (5.2);      5round (5.8);      6round (5.88888, 0);   6round (5.83333, 2);   5.83round (5.83353, 3);   5.834round (5201314,-2);  5201300

Three, upward rounding, there are decimals on the addition of 1:ceil ()

Echo (Ceil (0.60);   1echo (Ceil (0.40);   1echo (Ceil (5);      5echo (Ceil (5.1);    6echo (Ceil ( -5.1);   -5echo (Ceil ( -5.9));  -5

Four, downward rounding: Floor ()

echo (Floor (0.60));  0echo (Floor (0.40));     0echo (Floor (5));   5echo (Floor (5.1));  5echo (Floor (-5.1)); -6echo (Floor ( -5.9))//-6