從數組內的數組中獲取值

Question

我在理解數組時遇到麻煩。 例如，我得到了以下數據。

array(
  label=> person1
  start=> 2014-10-10
  end=> 2014-10-11
  class=> annual
)
array(
  label=> person2
  start=> 2014-10-08
  end=> 2014-10-08
  class=> sick
)
array(
  label=> person1
  start=> 2014-10-01
  end=> 2014-10-03
  class=> sick
)
array(
  label=> person3
  start=> 2014-10-20
  end=> 2014-10-20
  class=> annual
)
array(
  label=> person1
  start=> 2014-10-29
  end=> 2014-10-29
  class=> compassionate
)

我想這樣安排

array(
     [person1]=>array(
            array(
                start=> 2014-10-10
                end=> 2014-10-11
                class=> annual),
            array(
                start=> 2014-10-01
                end=> 2014-10-03
                class=> sick),
            array(
                 start=> 2014-10-29
                 end=> 2014-10-29
                 class=> compassionate), 
            ),
      [person2]=>array(
                 start=> 2014-10-08
                 end=> 2014-10-08
                 class=> sick),
      [person3]=>array(
                 start=> 2014-10-20
                 end=> 2014-10-20
                 class=> annual)
)

我的要求是在同一行中顯示帶有相同標簽的數據。 這是我使用的代碼，但是根本不起作用。

var $blocks = array();
var $data = array();
var $blocksByLabel = array();

global $blocksByLabel;
global $blocks;

foreach($this->data as $d) {
     foreach ($this->blocks as $block) {
         $label = $block->$d['label'];
              if (!array_key_exists($d['label'], $blocksByLabel)){
                    $blocksByLabel[$block->label] = array();
               }
array_push($blocksByLabel[$block->label], $blocks);
         }


  $this->blocks[] = array(
    'label' => $d['label'],
    'start' => $start = strtotime($d['start']),
    'end'   => $end   = strtotime($d['end']),
    'class' => @$d['class']
  );

Answer 1

用這個：

$old_array是源數組，而$new_array是重新排列的數組

foreach($old_array as $r) {
  $new_array[$r['label']][] = array("start" => $r['start'],
                                    "end"   => $r['end'],
                                    "class" => $r['class']);
}

這應該按照您想要的方式排列數組。並且您應該根據變量名重命名old_array和new_array。

附加的運行程序，以進一步說明

這是我的運行代碼：

<?php
  $old_array[] = array("label" => "person1", "start" => "2014-10-10", "end" => "2014-10-11", "class" => "anual");
  $old_array[] = array("label" => "person2", "start" => "2014-10-08", "end" => "2014-10-08", "class" => "sick");
  $old_array[] = array("label" => "person1", "start" => "2014-10-01", "end" => "2014-10-03", "class" => "sick");
  $old_array[] = array("label" => "person3", "start" => "2014-10-20", "end" => "2014-10-20", "class" => "anual");
  $old_array[] = array("label" => "person1", "start" => "2014-10-29", "end" => "2014-10-29", "class" => "compassionate");

  foreach($old_array as $r) {
    $new_array[$r['label']][] = array("start" => $r['start'],
                                "end" => $r['end'],
                                "class" => $r['class']);
  }

  echo "<pre>";
  print_r($new_array);
  echo "</pre>";
?>

執行后，輸出應為：

Array
(
    [person1] => Array
        (
            [0] => Array
                (
                    [start] => 2014-10-10
                    [end] => 2014-10-11
                    [class] => anual
                )

            [1] => Array
                (
                    [start] => 2014-10-01
                    [end] => 2014-10-03
                    [class] => sick
                )

            [2] => Array
                (
                    [start] => 2014-10-29
                    [end] => 2014-10-29
                    [class] => compassionate
                )

        )

    [person2] => Array
        (
            [0] => Array
                (
                    [start] => 2014-10-08
                    [end] => 2014-10-08
                    [class] => sick
                )

        )

    [person3] => Array
        (
            [0] => Array
                (
                    [start] => 2014-10-20
                    [end] => 2014-10-20
                    [class] => anual
                )

        )

)

為重新安排數組的代碼工作正常。請檢查您的$this->data通過可變var_dump($this->data)來檢查變量的內容。（如果源陣列不具有價值，當然結果也將沒有任何價值）。

希望這可以幫助..