求一个算法

[phperJoe]

怎么把数组中deal_id相同的数组拿出来，放在一个数组里面，例如：

array(
[0]=>array
(
[0] => Array
(
[id] => 1099
[deal_id] => 297
[user_id] => 854
[user_name] => jquery123
[money] => 100
[create_time] => 1395116590
[is_repay] => 0
[cate_id] => 7
[profit] => 103.62
)
[1] => Array
(
[id] => 1100
[deal_id] => 297
[user_id] => 854
[user_name] => jquery123
[money] => 100
[create_time] => 1395117228
[is_repay] => 0
[cate_id] => 7
[profit] => 103.62
)

)
[1] => Array
(
[id] => 1101
[deal_id] => 298
[user_id] => 854
[user_name] => jquery123
[money] => 100
[create_time] => 1395117490
[is_repay] => 0
[cate_id] => 7
[profit] => 103.62
)
)



问题：
Array
(
[0] => Array
(
[id] => 1099
[deal_id] => 297
[user_id] => 854
[user_name] => jquery123
[money] => 100
[create_time] => 1395116590
[is_repay] => 0
[cate_id] => 7
[profit] => 103.62
)

[1] => Array
(
[id] => 1100
[deal_id] => 297
[user_id] => 854
[user_name] => jquery123
[money] => 100
[create_time] => 1395117228
[is_repay] => 0
[cate_id] => 7
[profit] => 103.62
)

[2] => Array
(
[id] => 1101
[deal_id] => 298
[user_id] => 854
[user_name] => jquery123
[money] => 100
[create_time] => 1395117490
[is_repay] => 0
[cate_id] => 7
[profit] => 103.62
)

)


想了很长时间没想出来，望望大神指教

[xuzuning]

你的目的是什么？ 是把 数组1 变成 数组2的样子 还是从 数组1 或 数组2 中抽取 [deal_id] == 297 的成员到结果数组？

[phperJoe]

把问题底下的那个大数组变成上面那个大数组的形式

[phperJoe]

就是将数组中deal_id相等的数组合并到一个大数组中，问题就是这样，谢谢

[嘻哈大咖秀]

$arr = Array
(
    '0' => Array
        (
            'id' => 1099,
            'deal_id' => 297,
            "'user_id'" => 854,
            "'user_name'" => 'jquery123',
            "money" => 100,
            "create_time" => 1395116590,
            "is_repay" => 0,
            "cate_id" => 7,
            "profit" => 103.62
        ),

    "1" => Array
        (
            "id" => 1100,
            "deal_id" => 297,
            "user_id" => 854,
            "user_name" => 'jquery123',
            "money" => 100,
            "create_time" => 1395117228,
            "is_repay" => 0,
            "cate_id" => 7,
            "profit" => 103.62
        ),

    "2" => Array
        (
            "id" => 1101,
            "deal_id" => 298,
            "user_id" => 854,
            "user_name" => 'jquery123',
            "money" => 100,
            "create_time" => 1395117490,
            "is_repay" => 0,
            "cate_id" => 7,
            "profit" => 103.62
        )
);
$input = array();
$index = array();//用于存放deal_id 进行判断
foreach ($arr as $key => $value) {
	if(!in_array($value['deal_id'], $index)){
		array_push($index, $value['deal_id']);
		array_push($input,$value);
	}else{
		$index = array_search($value['deal_id'], $index);
		array_push($input[$index], $value);
	}
}
var_dump($index,$input);

[xuzuning]

$ar = array (
  array (
    'id' => '1099',
    'deal_id' => '297',
    'user_id' => '854',
    'user_name' => 'jquery123',
    'money' => '100',
    'create_time' => '1395116590',
    'is_repay' => '0',
    'cate_id' => '7',
    'profit' => '103.62',
  ),
  array (
    'id' => '1100',
    'deal_id' => '297',
    'user_id' => '854',
    'user_name' => 'jquery123',
    'money' => '100',
    'create_time' => '1395117228',
    'is_repay' => '0',
    'cate_id' => '7',
    'profit' => '103.62',
  ),
  array (
    'id' => '1101',
    'deal_id' => '298',
    'user_id' => '854',
    'user_name' => 'jquery123',
    'money' => '100',
    'create_time' => '1395117490',
    'is_repay' => '0',
    'cate_id' => '7',
    'profit' => '103.62',
  ),
);
$res = array();
foreach($ar as $v) $res[$v['deal_id']][] = $v;
array_walk($res, function(&$r) {
  if(count($r) == 1) $r = current($r);
});
$res = array_values($res);
print_r($res);

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [id] => 1099
                    [deal_id] => 297
                    [user_id] => 854
                    [user_name] => jquery123
                    [money] => 100
                    [create_time] => 1395116590
                    [is_repay] => 0
                    [cate_id] => 7
                    [profit] => 103.62
                )

            [1] => Array
                (
                    [id] => 1100
                    [deal_id] => 297
                    [user_id] => 854
                    [user_name] => jquery123
                    [money] => 100
                    [create_time] => 1395117228
                    [is_repay] => 0
                    [cate_id] => 7
                    [profit] => 103.62
                )

        )

    [1] => Array
        (
            [id] => 1101
            [deal_id] => 298
            [user_id] => 854
            [user_name] => jquery123
            [money] => 100
            [create_time] => 1395117490
            [is_repay] => 0
            [cate_id] => 7
            [profit] => 103.62
        )

)

[嘻哈大咖秀]

foreach ($arr as $key => $value) {
	
	if(!in_array($value['deal_id'], $index)){
		
		array_push($index, $value['deal_id']);
		
		$input[count($input)][] = $value;
	}else{
		$index = array_search($value['deal_id'], $index);
		$input[$index][] = $value;
	}
}