PHP多维数组操作

Question

我有一个数组AllUsers，格式如下：

Array AllUsers
(
    [0] => Array
         (
             [0] => Array
                  (
                      [0] => Tim
                      [1] => [e-mail]
                  )
             [1] => Array
                  (
                      [0] => John
                      [1] => [e-mail]
                  )
         )
    [1] => Array
         (
             [0] => Array
                  (
                      [0] => Mike
                      [1] => [e-mail]
                  )
             [1] => Array
                  (
                      [0] => Aron
                      [1] => [e-mail]
                  )
         )
)

我有另一个数组FilteredUsers，如下：

Array FilteredUsers
(
    [0] => Array
         (
             [0] => John
             [1] => [e-mail]
         )
    [1] => Array
         (
             [0] => Mike
             [1] => [e-mail]
         )
    [2] => Array
         (
             [0] => Mike
             [1] => [e-mail]
         )
)

现在我想要的是将FilteredUsers[]中的每个元素添加到AllUsers[]中，使得：

1. FilteredUsers[0]应该被添加到Batch AllUsers[1]中，因为Batch AllUsers[0]中已经有一个名为John的数组元素。
2. 类似地，FilteredUsers[1]应该被添加到Batch AllUsers[0]中。
3. 任何一个Batch（如AllUsers[0]，AllUsers[1]）都不能超过3个元素。如果所有Batches都满了，则应创建一个新的Batch，但必须将FilteredUsers[]中的每个元素都安排到某个Batch中。

因此，更新后的AllUsers数组应该像这样：

Array AllUsers
(
    [0] => Array
         (
             [0] => Array
                  (
                      [0] => Tim
                      [1] => [e-mail]
                  )
             [1] => Array
                  (
                      [0] => John
                      [1] => [e-mail]
                  )
             [2] => Array
                  (
                      [0] => Mike
                      [1] => [e-mail]
                  )
         )
    [1] => Array
         (
             [0] => Array
                  (
                      [0] => Mike
                      [1] => [e-mail]
                  )
             [1] => Array
                  (
                      [0] => Aron
                      [1] => [e-mail]
                  )
             [2] => Array
                  (
                      [0] => John
                      [1] => [e-mail]
                  )
         )
    [2] => Array
         (
             [0] => Array
                  (
                      [0] => Mike
                      [1] => [e-mail]
                  )
         )
)

- skos

---

只是好奇，为什么你需要3个一组？你可以轻松地使用for($i = 0; $i <= count($AllUsers), $i += 3){}。 - Vlad Preda

Answer 1

这是可行的代码：

我还为您创建了一个代码pastebin，网址为：http://codepad.org/iyZUpYxc。

<?php

//PHP Multidimensional Array Manipulation

$allUsers = array();
$allUsers[] = array(array('name'=>'Tim', 'email'=>'[e-mail]'), array('name'=>'John','email'=>'[e-mail]'));
$allUsers[] = array(array('name'=>'Mike', 'email'=>'[e-mail]'), array('name'=>'Aron','email'=>'[e-mail]'));

$filteredUsers = array();
$filteredUsers[] = array('name'=>'John', 'email'=>'[e-mail]');
$filteredUsers[] = array('name'=>'Mike', 'email'=>'[e-mail]');
$filteredUsers[] = array('name'=>'Mike', 'email'=>'[e-mail]');

//RULE: one batch cannot have duplicate user names

//print_r($allUsers);
//print_r($filteredUsers);

foreach ($filteredUsers as $filteredUser) {
  //$filteredUser is a single dimensional arrray.

  $filteredUserAdded = 0;
  foreach ($allUsers as &$allUser) {
     //$allUser is a muldimentional array.

     //Check whether the current batch contains $filteredUser['name'] value
     $intersect = array_uintersect(array($filteredUser), $allUser, 'compareName');
     if (empty($intersect) && count($allUser) < 3) {
         //We can add filtereduser here
         $allUser[] = $filteredUser; 
         $filteredUserAdded = 1;
     }

  } // end foreach $allUsers

  if ($filteredUserAdded == 0) {
      //This filtered user was not added in any existing batch.
      //Hence add it in a new batch
      $allUsers[] = array($filteredUser);       
  }
} // end foreach $filteredUsers


//function to compare the 'name' column value of two arrays
function compareName($array1, $array2)
{
   return strcmp($array1['name'], $array2['name']);
}

//Note: http://in1.php.net/array_uintersect is the key used here for comparison

print_r($allUsers);
print_r($filteredUsers);

?>

注意：您在上面的输出中错过了数组 ( [0] => John [1] => [e-mail] )。但是我的代码也正确地输出了它。谢谢。

- Jirilmon

Answer 2

接受挑战！！！

##### BORROWED FROM OMG
//PHP Multidimensional Array Manipulation

$allUsers = array();
$allUsers[] = array(array('name'=>'Tim', 'email'=>'[e-mail]'), array('name'=>'John','email'=>'[e-mail]'));
$allUsers[] = array(array('name'=>'Mike', 'email'=>'[e-mail]'), array('name'=>'Aron','email'=>'[e-mail]'));

$filteredUsers = array();
$filteredUsers[] = array('name'=>'John', 'email'=>'[e-mail]');
$filteredUsers[] = array('name'=>'Mike', 'email'=>'[e-mail]');
$filteredUsers[] = array('name'=>'Mike', 'email'=>'[e-mail]');

# using PHP's unique continue statement!    

# loop through filtered users
foreach($filteredUsers as $fUser) {
     #loop through all users batches
     foreach($allUsers as $key=>$aUsers) {
        # is it full?
        if(isset($aUsers[2]))continue;
        # any user with same name?
        foreach($aUsers as $aUser)
            if($aUser['name']==$fUser['name'])continue 2;
        # push in current batch
        $allUsers[$key][]=$fUser;
        continue 2;
    }
    # new batch needed
    $allUsers[]=$fUser;
}
var_dump($allUsers);

如果你不知道，continue 接受一个“参数”，表示要向上冒泡的控制流数量。

可以在 这里 找到可工作的代码。

- Khez