php添加带逗号千位符

1 $num = "1234567890.11";
2   
3 $num = preg_replace('/(?<=[0-9])(?=(?:[0-9]{3})+(?![0-9]))/', ',', $num);
4   
5 echo $num;

转载于:https://www.cnblogs.com/zwkuang/archive/2012/11/02/2751782.html