使用PHP的长浮点数

I have the number 2.23456789, I want to get it only 2.23 by using PHP,but I do not know how to do this, anyone help me please,Thanks.

You could use the round(value,precision) function. In your case, use:

round(2.23456789,2);

For further information check the PHP manual: http://php.net/manual/en/function.round.php

You simply want to round the number.

Use phps number_format function.