(PECL stats >= 1.0.0)
stats_stat_percentile — Returns the percentile value
stats_stat_percentile ( array $arr , float $perc ) : float
Returns the perc-th percentile value of the array arr.
arr
The input array
perc
The percentile
Returns the percentile values of the input array.
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https://www.php.net/manual/en/function.stats-stat-percentile.php