fetch value from array within array within array

Question

I have trouble understanding arrays. For example, I got the following data.

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
)

And I want to arrange it this way

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)
)

My requirement is to display the data with same label in the same row. This is the code I used but it does not works at all.

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

use this:

$old_array is the source array and $new_array is the rearanged array

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

this should arrange your array the way you want.. and you should rename the old_array and new_array based on your variable names..

ADDED RUNNING PROGRAM for further clarification

here is my running code:

<?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>";
?>

after execution, the output should be:

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
                )

        )

)

the code for rearranging the array is working fine.. please check your $this->data variable through var_dump($this->data) to check the variable's content.. (if the source array doesn't have value, of course the result would have no value either)..

hope this helps..