代码编辑器：
x
1
2
3
echo number_format("1000000") ,"<br>";4
echo number_format("1000000",2),"<br>";5
echo number_format("1000000",2,",",".");6
echo number_format("1000000") ,"<br>";echo number_format("1000000",2),"<br>";echo number_format("1000000",2,",",".");