(PECL stats >= 1.0.0)
stats_dens_laplace — Probability density function of the Laplace distribution
$x
   , float $ave
   , float $stdev
   ) : float
   Returns the probability density at x, where the
   random variable follows the Laplace distribution of which the location parameter
   is ave and the scale parameter is stdev.
  
xThe value at which the probability density is calculated
aveThe location parameter of the distribution
stdevThe shape parameter of the distribution
   The probability density at x or FALSE for failure.