<prompt> Unaweza kuandika script ya PHP ambayo inazidisha matrix mbili pamoja, matrix inaweza kuwa ya ukubwa wowote, lakini lazima iwe na muundo sahihi na jina linalofaa; script inapaswa pia kujumuisha maelekezo kwa pembejeo ya mtumiaji wa matrix, pamoja na utunzaji sahihi wa makosa kwa pembejeo isiyofaa; kwa kuongezea, matokeo yanapaswa kuonyeshwa katika muundo wazi na rahisi kutafsiriwa.  <response>: Matrices, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, matrix, 