PHP function to add commas to every three digits of numbers_php tips

PHP implements number formatting, a function that adds commas to every three digits of a number. 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 in numbers. At first, everyone saw that the question had no idea, and so did the editor. I hope this article can give you some inspiration.