如何求这个数组的最大值。。。最小值，
Array ( [0] => Array ( [0] => 1377045490 ) [1] => Array ( [0] => 1377045490 ) [2] => Array ( [0] => 1377045490 ) [3] => Array ( [0] => 1377046853 ) [4] => Array ( [0] => 1377046853 ) [5] => Array ( [0] => 1377046853 ) [6] => Array ( [0] => 1377046853 ) [7] => Array ( [0] => 1377046853 ) [8] => Array ( [0] => 1377046853 ) [9] => Array ( [0] => 1377046853 ) [10] => Array ( [0] => 1377046853 ) [11] => Array ( [0] => 1377046853 ) [12] => Array ( [0] => 1377046853 ) [13] => Array ( [0] => 1377046853 ) [14] => Array ( [0] => 1377046853 ) [15] => Array ( [0] => 1376960477 ) [16] => Array ( [0] => 1376960477 ) [17] => Array ( [0] => 1376960477 ) [18] => Array ( [0] => 1376960477 ) [19] => Array ( [0] => 1376960477 ) [20] => Array ( [0] => 1376960477 ) [21] => Array ( [0] => 1376960477 ) [22] => Array ( [0] => 1376960477 ) [23] => Array ( [0] => 1376960477 ) [24] => Array ( [0] => 1376960477 ) [25] => Array ( [0] => 1376960477 ) [26] => Array ( [0] => 1376960477 ) [27] => Array ( [0] => 1376960477 ) [28] => Array ( [0] => 1376960477 ) [29] => Array ( [0] => 1376960477 ) [30] => Array ( [0] => 1376960477 ) [31] => Array ( [0] => 1376881355 ) [32] => Array ( [0] => 1376881355 ) [33] => Array ( [0] => 1376881355 ) [34] => Array ( [0] => 1376874046 ) [35] => Array ( [0] => 1376874046 ) [36] => Array ( [0] => 1376874046 ) [37] => Array ( [0] => 1376874046 ) [38] => Array ( [0] => 1376874046 ) [39] => Array ( [0] => 1376874046 ) )
