<pre name="code" class="php">

<?php 
//需求：根據date欄位的值將每天的type的pv、uv的資料放到一個維度裡，目標陣列仍為二維陣列

//原始陣列
$resource_array=array
(
    '0' => Array
        (
            'type' => 'hot_list',
            'date' => '2016-07-18',
            'pv' => 2,
            'uv' => 2,
        ),

    '1' => Array
        (
            'type' => 'trailer_list',
            'date' => '2016-07-18',
            'pv' => 3,
            'uv' => 2,
        ),

    '2' => Array
		(
            'type' => 'portal',
            'date' => '2016-07-17',
            'pv' => 3,
            'uv' => 2,
        ),
	'3' => Array
		(
            'type' => 'trailer_list',
            'date' => '2016-07-17',
            'pv' => 3,
            'uv' => 2,
        ),
	'4' => Array
		(
            'type' => 'main',
            'date' => '2016-07-16',
            'pv' => 3,
            'uv' => 2,
        ),
	'5' => Array
		(
            'type' => 'play',
            'date' => '2016-07-16',
            'pv' => 3,
            'uv' => 2,
        ),
	'6' => Array
		(
            'type' => 'portal',
            'date' => '2016-07-15',
            'pv' => 3,
            'uv' => 2,
        ),
	'7' => Array
		(
            'type' => 'trailer_list',
            'date' => '2016-07-15',
            'pv' => 3,
            'uv' => 2,
        )
);
//宣告變數，存放原始陣列的時間值用於比較
$temp_time = '';
$target_array = array();
foreach($resource_array as $v){
		//第一次執行或者出現時間相同的元素
		if($temp_time == '' || $temp_time == $v['date']){
			if(is_null($target_array[$v['date']]['date'])){
				$target_array[$v['date']]['date'] = $temp_time;
			}
		}else{
		//出現不同的日期值需要給目標陣列建新的索引值
				$target_array[$v['date']]['date'] = $v['date'];
		}
		$temp_time = $v['date'];
		$target_array[$v['date']][$v['type'].'_pv'] = $v['pv'];
		$target_array[$v['date']][$v['type'].'_uv'] = $v['uv'];
			
	
	
}
var_dump($target_array);


//需要的結果
$target_array = array(

	0=>array(
		'date'=>'2016-07-18',
		'trailer_list_pv'=>3,
		'trailer_list_uv'=>2,
		'portal_pv'=>3,
		'portal_uv'=>2,
	),
	1=>array(
		'date'=>'2016-07-17',
		'trailer_list_pv'=>3,
		'trailer_list_uv'=>2,
		'portal_pv'=>3,
		'portal_uv'=>2,
	),
	2=>array(
		'date'=>'2016-07-16',
		'main_pv'=>3,
		'main_uv'=>2,
		'play_pv'=>3,
		'play_uv'=>2,
	),
	3=>array(
		'date'=>'2016-07-15',
		'trailer_list_pv'=>3,
		'trailer_list_uv'=>2,
		'portal_pv'=>3,
		'portal_uv'=>2,
	)

)

?> 
 

工作中碰到的問題，方便以後查閱，大神勿噴