php - extract a 1-dimension array out of an associative array

Question

I have an array as below and I want to get all the values in front of 'id', in a seperated array. Like: arry('12', '10', '11', '9')

 array
      3 => 
        array
          'occurance' => int 4
          'id' => string '12' (length=2)
      1 => 
        array
          'occurance' => int 3
          'id' => string '10' (length=2)
      2 => 
        array
          'occurance' => int 2
          'id' => string '11' (length=2)
      0 => 
        array
          'occurance' => int 1
          'id' => string '9' (length=1)

Baba · Accepted Answer · 2012-10-05 11:42:01Z

7

You can use array_map

$values = array(
        3 => array('occurance' => 4,'id' => '12'),
        1 => array('occurance' => 3,'id' => '10'),
        2 => array('occurance' => 2,'id' => '11'),
        0 => array('occurance' => 1,'id' => '9'));

$values = array_map(function($var){ return $var['id']; }, $values);
var_dump($values);

Output

array
  3 => string '12' (length=2)
  1 => string '10' (length=2)
  2 => string '11' (length=2)
  0 => string '9' (length=1)

answered Oct 5, 2012 at 11:42

Baba

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Comments

Mihai Iorga · Accepted Answer · 2012-10-05 11:34:58Z

2

Use a foreach loop and put id in another array:

$newArray = array()
foreach($array as $val){
    $newArray[] = $val['id'];
}

answered Oct 5, 2012 at 11:34

Mihai Iorga

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Comments

Jav_Rock · Accepted Answer · 2012-10-05 11:39:05Z

1

Try this:

foreach($YourArray as $ar)
{
    $FinalArray[] = $ar['id'];
}

print_r($FinalArray);

edited Oct 5, 2012 at 11:39

Jav_Rock

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answered Oct 5, 2012 at 11:35

Mohit Mehta

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Comments

Gendos-ua · Accepted Answer · 2016-11-11 22:01:31Z

1

Since PHP 5.5 you can use array_column.

$idArray = array_column($multiArray, 'id');

answered Nov 11, 2016 at 22:01

Gendos-ua

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Comments

geekman · Accepted Answer · 2012-10-05 11:38:47Z

0

foreach($array as $key=>$value)
{
if(array_key_exists('id',$value))
$arr2[]=$value['id'];
}

answered Oct 5, 2012 at 11:38

geekman

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