Four common methods for using integer functions in PHP _ PHP Tutorial

A summary of four common methods for using integer functions in PHP. Ceil-if the sum is obtained by the first method, floatceil (floatvalue) returns the next integer not less than value. if the value has a decimal part, it goes into one. The type returned by ceil () is still floa. Ceil-integer in one method
Description
Float ceil (float value)
Returns the next integer of no less than value. if the value has a decimal part, it is entered in one place. The type returned by ceil () is still float, because the float value range is usually larger than integer.
Example 1. ceil () example

The code is as follows:

Echo ceil (4.3); // 5
Echo ceil (9.999); // 10
?>

Floor-rounding
Description
Float floor (float value)
Returns the next integer not greater than value and rounds the decimal part of value. The return type of floor () is still float, because the float value range is usually larger than that of integer.
Example 1. floor () example

The code is as follows:

Echo floor (4.3); // 4
Echo floor (9.999); // 9
?>

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

The code is as follows:

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-convert a variable to an integer type
Example intval ()

The code is as follows:

Echo intval (4.3); // 4
Echo intval (4.6); // 4
?>

Http://www.bkjia.com/PHPjc/325691.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/325691.htmlTechArticleceil-the first method returns an integer not less than the value of float ceil (float value), and the value returns one digit if there is a fractional part. The type returned by ceil () is still floa...