PHP four ways to take integer functions

PHP takes integer functions commonly used four methods, the following collection of four functions, often used to take the whole function, a small sum today! Actually very simple, is just a few functions ~ ~ mainly: Ceil,floor,round,intval

Ceil-into one method to take the whole
Description
float ceil (float value)
Returns the next integer not less than value, in which value is entered if there is a fractional part. The type returned by Ceil () is still float, because the range of float values is usually larger than the integer.
Example 1. Ceil () example

The code is as follows:

<?php echo ceil (4.3); 5 echo ceil (9.999); Ten?>

floor-and rounding out the whole process
Description
Float floor (float value)
Returns the next integer not less than value, rounding out the fractional part of value. The type returned by floor () is still float, because the range of float values is usually larger than the integer.
Example 1. Floor () example

The code is as follows:

<?php echo floor (4.3); 4 echo Floor (9.999); 9?>

round-rounding of floating-point numbers
Description
Float round (float val [, int precision])
Returns the result of rounding Val based on the specified precision precision (number of digits after decimal point). Precision can also be negative or 0 (the default value).
Example 1. Round () example

The code is as follows:

<?php 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?>

intval-the variable into integer form
Example Intval ()

The code is as follows:

<?php echo intval (4.3); 4 echo intval (4.6); 4?>