PHP计算显示平均温度、五个最低及最高温度

<?php   $month_temp = "78, 60, 62, 68, 71, 68, 73, 85, 66, 64, 76, 63, 81, 76, 73,   68, 72, 73, 75, 65, 74, 63, 67, 65, 64, 68, 73, 75, 79, 73";   $temp_array = explode(',', $month_temp);   $tot_temp

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