What are the methods for rounding decimals in PHP?

Method: 1. Use intval() function, syntax "intval($num)"; 2. Use ceil() function, syntax "ceil($num)"; 3. Use floor() function, The syntax is "floor($num)"; 4. Use the round() function, the syntax is "round($num)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php decimal rounding Method

#1. Use the intval() function

<?php
header("Content-type:text/html;charset=utf-8"); 
$num = 123.456;
$int = intval($num);
echo &#39;变量 $int 的类型为：&#39;.gettype($int).&#39;<br>&#39;;
var_dump($int);
?>

intval() function is used to obtain The integer value of the variable; this function is often used for data type conversion to convert string and floating-point type variables into integer types.

2. Use the ceil() function - round up, if there is a decimal, add 1 to the integer part

<?php
header("Content-type:text/html;charset=utf-8"); 
$num = 123.456;
$int = ceil($num);
echo &#39;变量 $int 的类型为：&#39;.gettype($int).&#39;<br>&#39;;
var_dump($int);
?>

3. Use the floor() function--round down

<?php
header("Content-type:text/html;charset=utf-8"); 
$num = 123.456;
$int = floor($num);
echo &#39;变量 $int 的类型为：&#39;.gettype($int).&#39;<br>&#39;;
var_dump($int);
?>

4. Use the round() function--round up

<?php
header("Content-type:text/html;charset=utf-8"); 
$num = 123.456;
$int = round($num);
echo &#39;小数值为：&#39;.$num.&#39;<br>&#39;;
echo &#39;取整后值为：&#39;.$int .&#39;<br>&#39;;
var_dump($int);

$num = 123.556;
$int = round($num);
echo &#39;小数值为：&#39;.$num.&#39;<br>&#39;;
echo &#39;取整后值为：&#39;.$int .&#39;<br>&#39;;
var_dump($int);
?>

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