求高手指點，foreach遍曆三維數組時只能遍曆出第一個子級，這是為什麼呢？

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回複討論(解決方案)

三維數組需要三個foreach嵌套遍曆才可以。

但是我第一個父節點下的子節點能遍曆出來啊

不是特別清楚你的資料結構，檢查一下這個條件有沒有滿足
if(is_array($val[$key]))

你的外層迴圈是
foreach($monitorList as $key=>$val)
進入內層迴圈的條件是
if(is_array($val[$key]))
不符合條件時，自然就沒有輸出

你至少應
var_export($monitorList);
貼出結果看看

0 =>   array (    'id' => '6166',    'create_uid' => '1000',    'create_date' => '2015-01-30 09:48:10.000',    'write_uid' => '1000',    'write_date' => '2015-01-30 09:48:10.000',    'name' => 'C#進階編程',    'plan_type' => '102',    'parent_id' => '0',    'date_start' => '2015-01-30 00:00:00.000',    'date_stop' => '2015-01-30 00:00:00.000',    'product_id' => '2',    'product_qty' => '1',    'plan_director' => '',    'status' => '2',    'routing_id' => '2049',    'bom_id' => '1',    'oe_production_id' => '0',    'note' => '',    'curr_id' => NULL,    'oe_ean13' => '9002',    'workcenter_id' => NULL,    'ischild' => 1,    'plan_director_name' => '',    0 =>     array (      0 =>       array (        'id' => '6167',        'create_uid' => '1000',        'create_date' => '2015-01-30 09:48:11.000',        'write_uid' => '1000',        'write_date' => '2015-01-30 09:48:11.000',        'name' => 'C#進階編程_xyd工藝組1',        'plan_type' => '102',        'parent_id' => '6166',        'date_start' => '2015-01-30 00:00:00.000',        'date_stop' => '2015-01-30 00:00:00.000',        'product_id' => '2',        'product_qty' => NULL,        'plan_director' => '',        'status' => '1',        'routing_id' => '1',        'bom_id' => NULL,        'oe_production_id' => NULL,        'note' => 'oo',        'curr_id' => NULL,        'oe_ean13' => NULL,        'workcenter_id' => NULL,      ),      1 =>       array (        'id' => '6168',        'create_uid' => '1000',        'create_date' => '2015-01-30 09:49:20.000',        'write_uid' => '1000',        'write_date' => '2015-01-30 09:49:20.000',        'name' => 'C#進階編程_xyd工藝組2',        'plan_type' => '102',        'parent_id' => '6166',        'date_start' => '2015-01-30 00:00:00.000',        'date_stop' => '2015-01-30 00:00:00.000',        'product_id' => '2',        'product_qty' => NULL,        'plan_director' => '',        'status' => '1',        'routing_id' => '2',        'bom_id' => NULL,        'oe_production_id' => NULL,        'note' => 'pp',        'curr_id' => NULL,        'oe_ean13' => NULL,        'workcenter_id' => NULL,      ),    ),  ),  1 =>   array (    'id' => '6189',    'create_uid' => '1000',    'create_date' => '2015-01-30 14:45:00.000',    'write_uid' => '1000',    'write_date' => '2015-01-30 14:45:00.000',    'name' => 'Java進階編程',    'plan_type' => '102',    'parent_id' => '0',    'date_start' => '2015-01-30 00:00:00.000',    'date_stop' => '2015-01-30 00:00:00.000',    'product_id' => '6',    'product_qty' => '1',    'plan_director' => '',    'status' => '1',    'routing_id' => '2045',    'bom_id' => '6',    'oe_production_id' => '0',    'note' => '',    'curr_id' => NULL,    'oe_ean13' => '9002',    'workcenter_id' => NULL,    'ischild' => 1,    'plan_director_name' => '',    0 =>     array (      0 =>       array (        'id' => '6190',        'create_uid' => '1000',        'create_date' => '2015-01-30 14:45:00.000',        'write_uid' => '1000',        'write_date' => '2015-01-30 14:45:00.000',        'name' => 'Java進階編程_Java進階編程-次包-工序包1',        'plan_type' => '102',        'parent_id' => '6189',        'date_start' => '2015-01-30 00:00:00.000',        'date_stop' => '2015-01-30 00:00:00.000',        'product_id' => '6',        'product_qty' => NULL,        'plan_director' => '',        'status' => '4',        'routing_id' => '8',        'bom_id' => NULL,        'oe_production_id' => NULL,        'note' => '',        'curr_id' => '3032',        'oe_ean13' => NULL,        'workcenter_id' => NULL,      ),    ),  ),  2 =>   array (    'id' => '6191',    'create_uid' => '1000',    'create_date' => '2015-01-30 14:48:38.000',    'write_uid' => '1000',    'write_date' => '2015-01-30 14:48:38.000',    'name' => 'Java進階編程',    'plan_type' => '102',    'parent_id' => '0',    'date_start' => '2015-01-30 00:00:00.000',    'date_stop' => '2015-01-30 00:00:00.000',    'product_id' => '6',    'product_qty' => '1',    'plan_director' => '',    'status' => '1',    'routing_id' => '2045',    'bom_id' => '6',    'oe_production_id' => '0',    'note' => '',    'curr_id' => NULL,    'oe_ean13' => '9002',    'workcenter_id' => NULL,    'ischild' => 1,    'plan_director_name' => '',    0 =>     array (      0 =>       array (        'id' => '6192',        'create_uid' => '1000',        'create_date' => '2015-01-30 14:48:38.000',        'write_uid' => '1000',        'write_date' => '2015-01-30 14:48:38.000',        'name' => 'Java進階編程_Java進階編程-主包-工序包1',        'plan_type' => '102',        'parent_id' => '6191',        'date_start' => '2015-01-30 00:00:00.000',        'date_stop' => '2015-01-30 00:00:00.000',        'product_id' => '6',        'product_qty' => NULL,        'plan_director' => '',        'status' => '8',        'routing_id' => '7',        'bom_id' => NULL,        'oe_production_id' => NULL,        'note' => '',        'curr_id' => NULL,        'oe_ean13' => NULL,        'workcenter_id' => NULL,      ),    ),  ),  3 =>   array (    'id' => '6193',    'create_uid' => '1000',    'create_date' => '2015-01-30 14:51:45.000',    'write_uid' => '1000',    'write_date' => '2015-01-30 14:51:45.000',    'name' => 'C#進階編程',    'plan_type' => '102',    'parent_id' => '0',    'date_start' => '2015-01-30 00:00:00.000',    'date_stop' => '2015-01-30 00:00:00.000',    'product_id' => '2',    'product_qty' => '1',    'plan_director' => '',    'status' => '1',    'routing_id' => '2043',    'bom_id' => '1',    'oe_production_id' => '0',    'note' => '',    'curr_id' => NULL,    'oe_ean13' => '9002',    'workcenter_id' => NULL,    'ischild' => 1,    'plan_director_name' => '',    0 =>     array (      0 =>       array (        'id' => '6194',        'create_uid' => '1000',        'create_date' => '2015-01-30 14:51:45.000',        'write_uid' => '1000',        'write_date' => '2015-01-30 14:51:45.000',        'name' => 'C#進階編程_C#進階編程-主包',        'plan_type' => '102',        'parent_id' => '6193',        'date_start' => '2015-01-30 00:00:00.000',        'date_stop' => '2015-01-30 00:00:00.000',        'product_id' => '2',        'product_qty' => NULL,        'plan_director' => '',        'status' => '2',        'routing_id' => '5',        'bom_id' => NULL,        'oe_production_id' => NULL,        'note' => '',        'curr_id' => NULL,        'oe_ean13' => NULL,        'workcenter_id' => NULL,      ),    ),  ),  4 =>   array (    'id' => '6195',    'create_uid' => '1000',    'create_date' => '2015-01-30 15:12:48.000',    'write_uid' => '1000',    'write_date' => '2015-01-30 15:12:48.000',    'name' => 'C#進階編程',    'plan_type' => '102',    'parent_id' => '0',    'date_start' => '2015-01-30 00:00:00.000',    'date_stop' => '2015-01-30 00:00:00.000',    'product_id' => '2',    'product_qty' => '1',    'plan_director' => '',    'status' => '1',    'routing_id' => '2043',    'bom_id' => '1',    'oe_production_id' => '0',    'note' => 'ld',    'curr_id' => NULL,    'oe_ean13' => '9002',    'workcenter_id' => NULL,    'ischild' => 1,    'plan_director_name' => '',    0 =>     array (      0 =>       array (        'id' => '6196',        'create_uid' => '1000',        'create_date' => '2015-01-30 15:12:48.000',        'write_uid' => '1000',        'write_date' => '2015-01-30 15:12:48.000',        'name' => 'C#進階編程_主包',        'plan_type' => '102',        'parent_id' => '6195',        'date_start' => '2015-01-30 00:00:00.000',        'date_stop' => '2015-01-30 00:00:00.000',        'product_id' => '2',        'product_qty' => NULL,        'plan_director' => '',        'status' => '5',        'routing_id' => '5',        'bom_id' => NULL,        'oe_production_id' => NULL,        'note' => 'ld',        'curr_id' => '2008',        'oe_ean13' => NULL,        'workcenter_id' => NULL,      ),    ),  ),  5 =>   array (    'id' => '6197',    'create_uid' => '1000',    'create_date' => '2015-01-30 15:38:50.000',    'write_uid' => '1000',    'write_date' => '2015-01-30 15:38:50.000',    'name' => 'C#進階編程',    'plan_type' => '102',    'parent_id' => '0',    'date_start' => '2015-01-30 00:00:00.000',    'date_stop' => '2015-01-30 00:00:00.000',    'product_id' => '2',    'product_qty' => '1',    'plan_director' => '',    'status' => '1',    'routing_id' => '2043',    'bom_id' => '1',    'oe_production_id' => '0',    'note' => '',    'curr_id' => NULL,    'oe_ean13' => '9002',    'workcenter_id' => NULL,    'ischild' => 1,    'plan_director_name' => '',    0 =>     array (      0 =>       array (        'id' => '6198',        'create_uid' => '1000',        'create_date' => '2015-01-30 15:38:50.000',        'write_uid' => '1000',        'write_date' => '2015-01-30 15:38:50.000',        'name' => 'C#進階編程_次包1',        'plan_type' => '102',        'parent_id' => '6197',        'date_start' => '2015-01-30 00:00:00.000',        'date_stop' => '2015-01-30 00:00:00.000',        'product_id' => '2',        'product_qty' => NULL,        'plan_director' => '',        'status' => '3',        'routing_id' => '6',        'bom_id' => NULL,        'oe_production_id' => NULL,        'note' => '',        'curr_id' => NULL,        'oe_ean13' => NULL,        'workcenter_id' => NULL,      ),      1 =>       array (        'id' => '6199',        'create_uid' => '1000',        'create_date' => '2015-01-30 15:38:50.000',        'write_uid' => '1000',        'write_date' => '2015-01-30 15:38:50.000',        'name' => 'C#進階編程_主包',        'plan_type' => '102',        'parent_id' => '6197',        'date_start' => '2015-01-30 00:00:00.000',        'date_stop' => '2015-01-30 00:00:00.000',        'product_id' => '2',//富文字框限制字串為10000所以刪了些      ),    ),  ),)

看到這結果就昏了

if (is_array($val)) { //判斷$val的值是否是一個數組，如果是，則進入下層遍曆

??是
if (is_array($val)) 判?是否有下一?

謝謝各位大俠的指點錯誤原因找到了，後台壓資料時沒指定下標，直接$monitorList[$key][]=query($sql);導致前台遍曆出錯。
給個下標就搞定了。

