How to specify the number of characters in item(0)->nodeValue?

Question

PHP

Hello, tell me, in the xml file there is such a value 8.154
Through php I get the value, but how to make it take only 3 characters? Like this 8.1
$rating->item(0)->nodeValue; // get value

Answer 1

round up
php.net/round
Returns a substring
php.net/manual/en/function.substr.php
rounding is better than string trimming.