PHP保留兩位小數顯示

<?php

$num = '10.4567';

//第一種：利用round()對浮點數進行四舍五入
echo round($num,2).PHP_EOL; //10.46

//第二種：利用sprintf格式化字符串
$format_num = sprintf('%.2f',$num);
echo $format_num.PHP_EOL; //10.46

//第三種：利用千位分組來格式化數字的函數number_format()
echo number_format($num, 2).PHP_EOL; //10.46
//或者如下
echo number_format($num, 2, '.', ''); //10.46