Discrete Fourier Transform

This is a simple Discrete Fourier Transform library implemented in PHP.

require 'DFT.php';
// input discrete values
$Y=[2,3,-1,1];
// instantiate and calculate factors
$DFT=new DFT($Y);
// get Fourier (frquency domain) factors (Complex)
$Factors=$DFT->getFactors();
// get Magnitudes (absolute values) (float)
$Magnitudes=$DFT->getMagnitudes();

As simple as that!