How to convert php to 2 digits

How to convert php into a 2-digit number: 1. Create a php sample file; 2. Define the "function reverse_format($num,$precision=2){...}" method; 3. Pass " round($num,$precision);" only needs to retain 2 decimal places.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

How to convert php to 2 digits?

Formatting numbers in PHP, retaining 2 digits or specified digits

The code is as follows:

/** * 数字格式化 * @param $num 要格式划的数字 * @param $precision 保留小数点位数 */ function reverse_format($num,$precision=2) { $_num = round($num,$precision); //保留$precision位小数 if($precision==0) return $_num; $arr = explode('.',$_num); //拆分数字 $cnt = count($arr); if($cnt==1) { $len = 0; }else{ $len = strlen($arr[1]); } //由后补0组成的字符串 $_str = ''; for($i=0;$i<$precision-$len;$i++) { $_str .= '0'; } if($cnt==1) { $_str1 = ''; }else{ $_str1 = $arr[1]; } //拼接为最后的字符串 $result = $arr[0].".".$_str1.$_str; return $result; }

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