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--TEST-- stats_stat_powersum() --FILE-- <?php var_dump(stats_stat_powersum(array(1, 2, 4), 2)); var_dump(stats_stat_powersum(array(1, 2, 4), 0)); var_dump(stats_stat_powersum(array(1, 2, 4), -2)); var_dump(stats_stat_powersum(array(1, 0, 4), 1)); var_dump(stats_stat_powersum(array(1, 0, 4), 0)); var_dump(stats_stat_powersum(array(), 1)); ?> --EXPECTF-- float(21) float(3) float(1.3125) float(5) Warning: stats_stat_powersum(): Both value and power are zero in %s on line %d float(2) float(0)