PHP rounding, rounding, keeping two decimal places, etc. A complete list of number processing methods

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There are four commonly used methods for PHP rounding functions. The four functions are collected below; rounding functions are often used. Let’s briefly summarize them today! In fact, it is very simple, just a few functions~~The main ones are: ceil, floor, round, intval

1. ceil — Enter One-way rounding

Explanation

float ceil (float value)

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

Example: ceil()

<?php
 
echo ceil(4.3); // 5
echo ceil(9.999); // 10
 
?>

2. Floor - Rounding by rounding off method

Explanation

float floor (float value )

Returns the next integer not greater than value, and rounds the decimal part of value. The type returned by floor() is still float because the range of float values ​​is usually larger than that of integer.

Example: floor()

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

3. round - round floating point numbers

Instructions:

float round ( float val [, int precision] )

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

Example: round()

<?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
 
?>

4. intval—convert the variable into an integer type

例子：intval()

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

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