php操作数组

问题描述

问 题

$Data1 = [
     [ 'time'=> 1440491658, 'a'=> 1 ] ,
     [ 'time'=> 1440491668, 'a'=> 3 ],
     [ 'time'=> 1440491668, 'b'=> 5 ],
     [ 'time'=> 1440491668, 'c'=> 7 ],
     [ 'time'=> 1440491668, 'd'=> 12 ], 
     [ 'time'=> 1440491678, 'a'=> 11 ],
     [ 'time'=> 1440491678, 'b'=> 88 ],
     [ 'time'=> 1440491678, 'c'=> 13 ],
     [ 'time'=> 1440491678, 'd'=> 100 ],
     [ 'time'=> 1440491688, 'a'=> 11 ],
     [ 'time'=> 1440491688, 'b'=> 69 ],
     [ 'time'=> 1440491688, 'c'=> 12 ],
     [ 'time'=> 1440491688, 'd'=> 73 ],
     ];

 $Data2 = [
     [ 'time'=> 1440491658, 'a'=> 1 ],
     [ 'time'=> 1440491668, 'a'=> 3,'b'=>5,'c'=>7,'d'=>12 ],
     [ 'time'=> 1440491678, 'a'=> 11,'b'=>88,'c'=>13,'d'=>100 ],
     [ 'time'=> 1440491688, 'a'=> 11,'b'=>69,'c'=>12,'d'=>73 ],
     ];
     
    //如何将data1转换成data2的格式？？

解决方案

foreach ($Data1 as $data) {
    foreach ($data as $key => $value) {
        if($key == 'time') {
            $index = $value;
        }
        $tmp[$index][$key]  = $value;
    }
}

var_dump(array_values($tmp));

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