php verify whether it is two decimal places

php verifies whether it is two decimal places

1. First create a function fun and receive a parameter num;

2. Then use preg_match within the function to perform regular matching on num;

3. If the final match is successful, num will be two decimal places.

The code is as follows:

<?php

function fun($num) {
	if (preg_match(&#39;/^[0-9]+(.[0-9]{2})$/&#39;, $num)) {
		echo $num, &#39;对<br>&#39;;
	}else{
	    echo $num, &#39;错<br>&#39;;
	}
}

fun(111);
fun(1112.01);
fun(2324.1);
fun(2324.15);
fun(2324.157);
fun(0.57);

Result:

111错
1112.01对
2324.1错
2324.15对
2324.157错
0.57对

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