php implements number formatting, function to add commas to every three digits of numbers, the specific code is as follows :
function num_format($num){ if(!is_numeric($num)){ return false; } $num = explode('.',$num);//把整数和小数分开 $rl = $num[1];//小数部分的值 $j = strlen($num[0]) % 3;//整数有多少位 $sl = substr($num[0], 0, $j);//前面不满三位的数取出来 $sr = substr($num[0], $j);//后面的满三位的数取出来 $i = 0; while($i <= strlen($sr)){ $rvalue = $rvalue.','.substr($sr, $i, 3);//三位三位取出再合并,按逗号隔开 $i = $i + 3; } $rvalue = $sl.$rvalue; $rvalue = substr($rvalue,0,strlen($rvalue)-1);//去掉最后一个逗号 $rvalue = explode(',',$rvalue);//分解成数组 if($rvalue[0]==0){ array_shift($rvalue);//如果第一个元素为0,删除第一个元素 } $rv = $rvalue[0];//前面不满三位的数 for($i = 1; $i < count($rvalue); $i++){ $rv = $rv.','.$rvalue[$i]; } if(!empty($rl)){ $rvalue = $rv.'.'.$rl;//小数不为空,整数和小数合并 }else{ $rvalue = $rv;//小数为空,只有整数 } return $rvalue; }
In addition, you can use the system's own function string number_format ( float number [, int decimals [, string dec_point, string thousands_sep]] ):
Example:
echo number_format('169856420');
The output will be: 169,856,420
echo number_format('1000000',2);
The output will be: 1,000,000.00
echo number_format('1000000',2,',','.');
The output will be: 1.000.000,00
The above is the PHP code to add commas to every three digits of a number. At first, when you saw the question, you may have no idea, and so did the editor. I hope this article can give you some inspiration.