What is the php division function?

There are 3 PHP division functions, namely: 1. round function, used to round floating point numbers; 2. ceil function, used to round up to the nearest integer; 3. floor function, used Rounded down to the nearest integer.

Recommended: "PHP Video Tutorial"

How to divide and round in php (round, ceil, floor)

When encountering a situation where the result of division needs to be rounded in PHP, the following methods need to be used:

1. round: rounding

round() function rounds floating point numbers.

Syntax: round(x, prec)

Parameters

x is optional. Specifies the number to be rounded.

prec Optional. Specifies the number of digits after the decimal point.

Description: Returns the result of rounding x according to the specified precision prec (the number of decimal digits after the decimal point). prec can also be negative or zero (default).

Tip: PHP cannot handle strings like "12,300.2" correctly by default.

Example:

<?php
echo(round(0.60));
echo(round(0.50));
echo(round(0.49));
echo(round(-4.40));
echo(round(-4.60));
?>

Output:

1
1
0
-4
-5

2. ceil: Round up

ceil() function rounds up to the nearest integer.

Syntax: ceil(x)

Parameters

x is required. Specifies the number to be rounded.

Description: Return the next integer that is not less than x. If x has a decimal part, it will be rounded up by one. The type returned by ceil() is still float because the range of float values ​​is usually larger than that of integer.

Example:

<?php
echo(ceil(0.60);
echo(ceil(0.40);
echo(ceil(5);
echo(ceil(5.1);
echo(ceil(-5.1);
echo(ceil(-5.9));
?>

Output:

1
1
5
6
-5
-5

3. floor: round down

floor() function rounds down to the nearest integer.

Syntax: floor(x)

Parameters

x is required. Specifies the number to be rounded.

Description: Return the next integer not greater than x, and round off the decimal part of x. The type returned by floor() is still float because the range of float values ​​is usually larger than that of integer.

Example:

<?php
echo(floor(0.60));
echo(floor(0.40));
echo(floor(5));
echo(floor(5.1));
echo(floor(-5.1));
echo(floor(-5.9))
?>

Output:

0
0
5
5
-6
-6

The above is the detailed content of What is the php division function?. For more information, please follow other related articles on the PHP Chinese website!