这是一个php版的简单计算器，就一个文件，打开就行，没什么好介绍的。功能不是太多，加、减、乘、除、求余。（其他功能有待下一版本改进吧）。通过ie7和firefox测试。-This is a php version of the simple calculator, on a file, open on the line, nothing to introduce. Function is not too much, plus, minus, multiply, divide, and more than. (Other features to be the next version to improve it). Through ie7 and firefox tests.