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                $num = 10.4567; ### 第一種:利用round()對浮點數進行四舍五入 ``` echo round($num,2); //10.46 ``` ### 第二種:利用sprintf格式化字符串 ``` $format_num = sprintf("%.2f",$num); echo $format_num; //10.46 ``` ### 第三種:利用千位分組來格式化數字的函數number_format() ``` echo number_format($num, 2); //10.46 ``` #### 或者如下 ``` echo number_format($num, 2, '.', ''); //10/46 ```
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