二維數組，演算法

二維數組，求一個演算法
這個數組是這樣子的，怎麼把這樣的數組，相同employee_id的yeji加起來
Array
(
[0] => Array
(
[employee_id] => 26
[yeji] => 60
)

[1] => Array
(
[employee_id] => 25
[yeji] => 105
)

[2] => Array
(
[employee_id] => 26
[yeji] => 100
)

[3] => Array
(
[employee_id] => 25
[yeji] => 0
)

)

合并後的數組是這樣
Array
(
[0] => Array
(
[employee_id] => 26
[yeji] => 160
)

[1] => Array
(
[employee_id] => 25
[yeji] => 105
)
)
------解決思路----------------------

$ar = array (
  0 => array (
    'employee_id' => '26',
    'yeji' => '60',
  ),
  1 => array (
    'employee_id' => '25',
    'yeji' => '105',
  ),
  2 => array (
    'employee_id' => '26',
    'yeji' => '100',
  ),
  3 => array (
    'employee_id' => '25',
    'yeji' => '0',
  ),
);

$res = array();
foreach($ar as $item) {
  $res[$item['employee_id']]['employee_id'] = $item['employee_id'];
  @$res[$item['employee_id']]['yeji'] += $item['yeji'];
}
print_r(array_values($res));

Array
(
    [0] => Array
        (
            [employee_id] => 26
            [yeji] => 160
        )

    [1] => Array
        (
            [employee_id] => 25
            [yeji] => 105
        )

)

------解決思路----------------------

$arr = array (
  0 => array (
    'employee_id' => '26',
    'yeji' => '60',
  ),
  1 => array (
    'employee_id' => '25',
    'yeji' => '105',
  ),
  2 => array (
    'employee_id' => '26',
    'yeji' => '100',
  ),
  3 => array (
    'employee_id' => '25',
    'yeji' => '0',
  ),
);
$item=array();
foreach($arr as $k=>$v){
    if(!isset($item[$v['employee_id']])){
        $item[$v['employee_id']]['employee_id']=$v['employee_id'];
        $item[$v['employee_id']]['yeji']=$v['yeji'];
    }else{
        $item[$v['employee_id']]['yeji']+=$v['yeji'];
    }
}
print_r($item);

Array
(
    [26] => Array
        (
            [employee_id] => 26
            [yeji] => 160
        )

    [25] => Array
        (
            [employee_id] => 25
            [yeji] => 105
        )

)

------解決思路----------------------

function calcArrSameId($arr=array())
{
foreach ($arr as $key => $value) {
//print_r($value);die;
if(!isset($tmp[$value['employee_id']]))
{
$tmp[$value['employee_id']]['employee_id'] = $value['employee_id'];
$tmp[$value['employee_id']]['yeji'] = $value['yeji'];
}else{
$tmp[$value['employee_id']]['yeji'] += $value['yeji'];
}

}
$list = array_values($tmp);
print_r($list);exit;
}

