Question

php如何操作数组遍历追加数据

规则：用数组1中的id匹配数组2中的uid
如果数组2中的uid和数组1中的uid相同的话
那就让数组2中的信息显示在数组1中uid相同的下面(独立的一个数组内)
数组1每个子数组下面都要显示3条数组2的信息
uid和uid相同的优先显示
uid和uid相同大于3条的话就只显示3条
小于3条时用其余的从小到达显示补全
求大神们解答

数组1
$arr1 = array(
array('uid'=>1,'times'=>'2014-02-25','counts'=>'19'),
array('uid'=>2,'times'=>'2014-02-26','counts'=>'17'),
array('uid'=>3,'times'=>'2014-02-27','counts'=>'6')
);

数组2
$arr2 = array(
array('id'=>1,'uid'=>1,'times'=>'2014-02-25','counts'=>'19'),
array('id'=>2,'uid'=>1,'times'=>'2014-02-26','counts'=>'17'),
array('id'=>3,'uid'=>1,'times'=>'2014-02-27','counts'=>'16'),
array('id'=>4,'uid'=>3,'times'=>'2014-02-28','counts'=>'18'),
array('id'=>5,'uid'=>1,'times'=>'2014-02-28','counts'=>'15'),
array('id'=>6,'uid'=>4,'times'=>'2014-02-28','counts'=>'14'),
array('id'=>7,('uid'=>4,'times'=>'2014-02-28','counts'=>'13'),
array('id'=>8,'uid'=>1,'times'=>'2014-02-28','counts'=>'12'),
array('id'=>9,'uid'=>1,'times'=>'2014-02-28','counts'=>'11'),
array('id'=>10,'uid'=>3,'times'=>'2014-02-28','counts'=>'10')
);

最后生成一个这样的数组
Array
(
[0] => Array
(
[arr1] => Array
(
array('id'=>1,'times'=>'2014-02-25','counts'=>'19'),
)

[arr2] => Array
(
array('id'=>1,'uid'=>1,'times'=>'2014-02-25','counts'=>'19'),
array('id'=>2,'uid'=>1,'times'=>'2014-02-26','counts'=>'17'),
array('id'=>3,'uid'=>1,'times'=>'2014-02-27','counts'=>'16'),
)

)
[1] => Array
(
[arr1] => Array
(
array('id'=>2,'times'=>'2014-02-26','counts'=>'17'),
)

[arr2] => Array
(
array('id'=>5,'uid'=>1,'times'=>'2014-02-28','counts'=>'15'),
array('id'=>8,'uid'=>1,'times'=>'2014-02-28','counts'=>'12'),
array('id'=>9,'uid'=>1,'times'=>'2014-02-28','counts'=>'11'),

)

)
[2] => Array
(
[arr1] => Array
(
array('id'=>3,'times'=>'2014-02-27','counts'=>'6')
)

[arr2] => Array
(
array('id'=>4,'uid'=>3,'times'=>'2014-02-28','counts'=>'18'),
array('id'=>10,'uid'=>3,'times'=>'2014-02-28','counts'=>'10'),
array('id'=>6,'uid'=>4,'times'=>'2014-02-28','counts'=>'14'),

)

)
)

Answer 1

可以遍历两次$a, 第一次取出所有的父级栏目，放入$newarr中，第二次将子栏目放入对应
的父级栏目数组中, 最后使用$newarr就行
不过这是建立在只有二级栏目的基础上，如果有三级栏目的话就还要麻烦些了

$newarr = array();
foreach ($a as $key => $value)
{
if($value['fID'] == 0)
{
$cid = $value['cID'];
$newarr[$cid] = $value;
unset($a[$key]);
}
}

foreach ($a as $key => $value)
{
if($value['fID'] != 0)
{
$fid = $value['fID'];
$newarr[$fid]['zilanmu'][] = $value;
}
}