php浮点数取整

test.php

<?php
echo 'ceil(1.2):'.ceil(1.2)."\n";
echo 'ceil(1.6):'.ceil(1.6)."\n";
echo 'floor(1.2):'.floor(1.2)."\n";
echo 'floor(1.6):'.floor(1.6)."\n";
echo 'round(1.2):'.round(1.2)."\n";
echo 'round(1.6):'.round(1.6)."\n";die;

运行结果如下：