How to determine how many decimals there are in php

How to determine how many decimals there are in php: 1. Use the "strlen(substr($num, strrpos($num, '.') 1))" statement to determine; 2. Use "strlen(array_pop( explode('.',$num)))" statement.

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

php determines a number Methods for how many decimals there are

Method 1: Use strrpos(), substr(), strlen() functions

<?php
function getLen($num)
{

         $pos = strrpos($num, &#39;.&#39;);
         $ext = substr($num, $pos+1);
	 $len=strlen($ext);
         return $len;
}
$num=3.14254;
echo getLen($num);
?>

Output results:

5

Method 2: Use the explode(), array_pop(), strlen() functions

<?php
function getLen($num)
{
         $arr = explode(&#39;.&#39;,$num);
	 $str=array_pop($arr);
	 $len=strlen($str);
         return $len;
}
$num=25.365;
echo getLen($num);
?>

Output result:

3

Recommended learning: "PHP Video Tutorial"

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