PHP function encapsulation for adding commas to every three digits-PHP Tutorial-php.cn

PHP function encapsulation for adding commas to every three digits

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Release： 2023-03-18 16:48:01

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This article mainly introduces the function of adding commas every three digits in PHP. Friends who want to know how to add commas every three digits can refer to it. I hope to be helpful.

php implements digital 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; 
 } 
 $num = explode(&#39;.&#39;,$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 = $rvalue.&#39;,&#39;.substr($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 
 $rvalue = explode(&#39;,&#39;,$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 = $rv.&#39;,&#39;.$rvalue[$i]; 
 } 
 if(!empty($rl)){ 
  $rvalue = $rv.&#39;.&#39;.$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; 
}

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In addition, you can Use the function that comes with the system string number_format (float number [, int decimals [, string dec_point, string thousands_sep]] ):

Example:

echo number_format(&#39;169856420&#39;);

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The output will be: 169,856,420

echo number_format(&#39;1000000&#39;,2);

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The output result will be: 1,000,000.00

echo number_format(&#39;1000000&#39;,2,&#39;,&#39;,&#39;.&#39;);

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The output result will be: 1.000.000,00

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