php-armadillo/stubs/impl/SpCxDMat.php

<?php

namespace Arma;

class SpCxDMat extends SpMat
{
    /**
     * Construct a complex sparse matrix out of two non-complex sparse matrices.
     *
     * @param SpDMat $real
     * @param SpDMat $imag
     * @return SpCxDMat
     */
    static function fromMats($real, $imag) {
        return new SpCxDMat;
    }
}