Php Data Integration and master challenges-php Tutorial

Php Array merging experts challenge to combine the following arrays into an Array (& nbsp; [0] & gt; Array & nbsp; (& nbsp; [id] & gt; default & nbsp; [name] & gt; aaa & nbsp; [tel] & gt; bbb & nbs php array merging master challenge
Merge the following array into an array
Array
(
[0] => Array
(
[Id] => default
[Name] => aaa
[Tel] => bbb
[Age] => ccc
)

[1] => Array
(
[Id] => 11
[Name] => aaa
[Tel] => bbb
[Age] => ccc
)

[2] => Array
(
[Id] => 22
[Name] => aaa
[Tel] => bbb
[Age] => ccc
)

[3] => Array
(
[Id] => 33
[Name] => aaa
[Tel] => bbb
[Age] => ccc
)

[4] => Array
(
[Id] => 44
[Name] => new
[Tel] => eee
[Age] => fff
)

[5] => Array
(
[Id] => 66
[Name] => new
[Tel] => eee
[Age] => fff
)

)


Merge the preceding array into the following array

Array
(
[0] => Array
(
[Id] => array (
[0] => default
[1] => 11
[2] => 22
[3] => 33
)
[Name] => aaa
[Tel] => bbb
[Age] => ccc
)

[1] => Array
(
[Id] => array (
[0] => 44,
[1] => 66
)
[Name] => new
[Tel] => eee
[Age] => fff
)

)

------ Solution --------------------

PHP code

$ar = array (  0 =>   array (    'id' => 'default',    'name' => 'aaa',    'tel' => 'bbb',    'age' => 'ccc',  ),  1 =>   array (    'id' => '11',    'name' => 'aaa',    'tel' => 'bbb',    'age' => 'ccc',  ),  2 =>   array (    'id' => '22',    'name' => 'aaa',    'tel' => 'bbb',    'age' => 'ccc',  ),  3 =>   array (    'id' => '33',    'name' => 'aaa',    'tel' => 'bbb',    'age' => 'ccc',  ),  4 =>   array (    'id' => '44',    'name' => 'new',    'tel' => 'eee',    'age' => 'fff',  ),  5 =>   array (    'id' => '66',    'name' => 'new',    'tel' => 'eee',    'age' => 'fff',  ),);$res = array();foreach($ar as $r) {  $k = "$r[name]--$r[tel]--$r[age]";  if(! isset($res[$k])) {    $res[$k] = $r;    $res[$k]['id'] = array();  }  $res[$k]['id'][] = $r['id'];}$res = array_values($res);print_r($res);