Excel公式转换为PHP编辑：如何在PHP中使用^

Question

I have an Excel formula

=180*((B10/B9)*(((B10/B9)^2+((B12/B9)*2)^2)^-0,5)*BOOGTAN((((B10/B9)^2+((B12/B9)*2)^2)^-0,5))+((B10/B9)/WORTEL(1+((B12/B9)*2)^2))/(B10/B9)*BOOGTAN((B10/B9)/WORTEL(1+((B12/B9)*2)^2)))/(2*PI())

Which I converted to PHP

$straling = 180*(($gevelhoogte/$gevelbreedte)*((($gevelhoogte/$gevelbreedte)^2+(($afstand/$gevelbreedte)*2)^2)^-0.5)*atan(((($gevelhoogte/$gevelbreedte)^2+(($afstand/$gevelbreedte)*2)^2)^-0.5))+(($gevelhoogte/$gevelbreedte)/sqrt(1+(($afstand/$gevelbreedte)*2)^2))/($gevelhoogte/$gevelbreedte)*atan(($gevelhoogte/$gevelbreedte)/sqrt(1+(($afstand/$gevelbreedte)*2)^2)))/(2*PI());

But now, for some reason the outcome isn't equal. I expect it has somethingto do with (( vs )).

Can someone please help here?

Answer 1

You can't use ^ in PHP, as the ^ operator is the bitwise XOR operator in PHP. In order to use "to the power of" function, you need to use the pow(x,y) function in PHP, which gives "x to the power of y".

In short, you need to use this formula:

$straling = 180*(($gevelhoogte/$gevelbreedte)*(pow(pow($gevelhoogte/$gevelbreedte,2)+pow(($afstand/$gevelbreedte)*2,2),-0.5))*atan((pow(pow($gevelhoogte/$gevelbreedte,2)+pow(($afstand/$gevelbreedte)*2,2),-0.5)))+(($gevelhoogte/$gevelbreedte)/sqrt(1+pow(($afstand/$gevelbreedte)*2,2)))/($gevelhoogte/$gevelbreedte)*atan(($gevelhoogte/$gevelbreedte)/sqrt(1+pow(($afstand/$gevelbreedte)*2,2))))/(2*PI());

Answer 2

From your variable names I assume youre Dutch, but I'll keep this in English since other users will able to read then too ;)

Maybe you'll find this PHP library useful! http://phpexcel.codeplex.com/ There is a calculation module in there that will handle a lot of different ExcelFormulas.

Since your formula is quite complex, I am not sure if it will handle correct. But give it a try I'd say.