stats_dens_chisquare

(PECL stats >= 1.0.0)

stats_dens_chisquare — Probability density function of the chi-square distribution

function stats_dens_chisquare(float $x, float $dfr): float

Returns the probability density at x, where the random variable follows the chi-square distribution of which the degree of freedom is dfr.

The probability density at x or false for failure.