按列对二维数组进行分组，并从分组子数组中删除分组列

Question

鉴于我的数组

array [0]
    fielda: cca
    fieldb: my value b
    fieldc: my value c
    fieldd: my value d

array [1]
    fielda: cca
    fieldb: my value b
    fieldc: my value c
    fieldd: my value d

array [2]
    fielda: cca
    fieldb: my value b
    fieldc: my value c
    fieldd: my value d

array [3]
    fielda: ccb
    fieldb: my value b
    fieldc: my value c
    fieldd: my value d

array [4]
    fielda: ccb
    fieldb: my value b
    fieldc: my value c
    fieldd: my value d

是否有一种简单的方法来重组它，以便 fielda 像这样分组

array [0]
    fielda: cca
        array [0]
            fieldb: my value b
            fieldc: my value c
            fieldd: my value d
        array [1]           
            fieldb: my value b
            fieldc: my value c
            fieldd: my value d
        array [2]                   
            fieldb: my value b
            fieldc: my value c
            fieldd: my value d
        array [3]                   

array [1]
    fielda: ccb
        array [0]
            fieldb: my value b
            fieldc: my value c
            fieldd: my value d
        array [1]           
            fieldb: my value b
            fieldc: my value c
            fieldd: my value d

Answer 1

也许有一种更简单的方法，但这应该适合您：

$new_array = array();
foreach ($array as $values) // $array is your original array
{
    $new_array[array_shift($values)][] = $values;
}
print_r($new_array);

DEMO： http://codepad.org/M26yBLL4

Answer 2

像这样的东西应该有效：

$restructured = array();

foreach( $myarray as $value ){
    $key = $value['fielda'];
    unset($value['fielda']);
    $restructured[$key][] = $value;
}