floor()

(PHP 4, PHP 5, PHP 7)

舍去法取整

说明

返回不大于$value的最接近的整数，舍去小数部分取整。

参数

要取整的数字

返回值

返回不大于$value的最接近的整数，将$value的小数部分舍去取整。floor()返回的类型仍然是float，因为float值的范围通常比integer要大。

范例

Example #1floor()例子

参见

• ceil() 进一法取整
• round() 对浮点数进行四舍五入

I believe this behavior of the floor function was intended. Note that it says "the next lowest integer". -1 is "higher" than -1.6. As in, -1 is logically greater than -1.6. To go lower the floor function would go to -2 which is logically less than -1.6.
Floor isn't trying to give you the number closest to zero, it's giving you the lowest bounding integer of a float.
In reply to Glen who commented:
 Glen
01-Dec-2007 04:22

instead use intval (seems to work v5.1.6): 

I use this function to floor with decimals: 

A correction to the funcion floor_dec from the user "php is the best".
If the number is 0.05999 it returns 0.59 because the zero at left position is deleted.
I just added a '1' and after the floor or ceil call remove with a substr.
Hope it helps.
function floor_dec($number,$precision = 2,$separator = '.') {
 $numberpart=explode($separator,$number);
 $numberpart[1]=substr_replace($numberpart[1],$separator,$precision,0);
 if($numberpart[0]>=0) {
  $numberpart[1]=substr(floor('1'.$numberpart[1]),1);
 } else {
  $numberpart[1]=substr(ceil('1'.$numberpart[1]),1);
 }
 $ceil_number= array($numberpart[0],$numberpart[1]);
 return implode($separator,$ceil_number);
}

But, if you want the number closest to zero, you could use this:

-benrr101

Have solved a "price problem":

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