php - How to split array element by word inside a foreach loop -

i have following array:

$phones = array(   [0] => apple iphone 4   [1] => apple iphone 5   [2] => samsung galaxy s6 ) 

what i'd split array up, separating brand model of phone, in end can build array give me this:

$phone_array = array (   'apple' => array (       'iphone 4', 'iphone 5'   ),   'samsung' => array (       'galaxy s6',   ) ) 

so far, have following unfinished code:

        $brand_dictionary = "/(samsung|apple|htc|sony|nokia)/i";         foreach($phones $p) {             if(stripos($p,$brand_dictionary)) {                 pr($p);                 die();             }         } 

but isn't working correctly @ all.

try -

$phones = array(   'apple iphone 4',   'apple iphone 5',   'samsung galaxy s6' );  $new = array();  foreach($phones $phone) {   $temp = explode(' ', $phone);   $key = array_shift($temp);   $new[$key][] = implode(' ', $temp);  }  var_dump($new); 

output

array(2) {   ["apple"]=>   array(2) {     [0]=>     string(8) "iphone 4"     [1]=>     string(8) "iphone 5"   }   ["samsung"]=>   array(1) {     [0]=>     string(9) "galaxy s6"   } }