stats_stat_percentile
(PECL stats >= 1.0.0)
stats_stat_percentile — Returns the percentile value
说明
   stats_stat_percentile
    ( array 
  $arr
   , float $perc
   ) : float
   Returns the perc-th percentile value of the array arr.
  
参数
- 
arr
- 
      The input array 
- 
perc
- 
      The percentile 
返回值
Returns the percentile values of the input array.