Split array of strings on first space and make new array grouping by first word

Question

I have the following array:

$phones = array(
  [0] => Apple iPhone 4
  [1] => Apple iPhone 5
  [2] => Samsung Galaxy S6
)

What I'd like to do is split this array up, separating the brand from the model of phone, so in the end I can build an array that would give me this:

$phone_array = array (
  'Apple' => array (
      'iPhone 4', 'iPhone 5'
  ),
  'Samsung' => array (
      'Galaxy S6',
  )
)

So far, I have the following unfinished code:

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

But this isn't working correctly at all.

First of all i dont think you can do stripos in if statement, cause its returning mixed type, not bool (lets say its in 0 position then it will be false, like in your example) 2nd problem is that even if you find 'Samsung' you still need to find 'Galaxy' with your code — Buzka91
– Buzka91, Commented Jul 10, 2015 at 8:35

Sougata Bose · Accepted Answer · 2015-07-10 08:33:13Z

3

Try with -

$phones = array(
  'Apple iPhone 4',
  'Apple iPhone 5',
  'Samsung Galaxy S6'
);

$new = array();

foreach($phones as $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"
  }
}

answered Jul 10, 2015 at 8:33

Sougata Bose

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Comments

Viral · Accepted Answer · 2015-07-10 09:07:41Z

3

Could be simpler,

$phones = ['Apple iPhone 4','Apple iPhone 5','Samsung Galaxy S6'];

$final = [];

foreach($phones as $phone)
{
    $brand_name = strtok($phone, " ");
    $final[$brand_name][] = trim(strstr($phone, " "));
}

Dump of $final,

array (size=2)
  'Apple' => 
    array (size=2)
      0 => string 'iPhone 4' (length=8)
      1 => string 'iPhone 5' (length=8)
  'Samsung' => 
    array (size=1)
      0 => string 'Galaxy S6' (length=9)

answered Jul 10, 2015 at 9:07

Viral

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Comments

mickmackusa · Accepted Answer · 2022-07-31 08:19:42Z

0

You only need to call one function while looping if you limit the space-splitting to 1 explosion. For concise syntax in the loop body, use array destructuring to push data into the grouped result array.

Code: (Demo)

$result = [];
foreach ($phones as $item) {
    [$key, $result[$key][]] = explode(' ', $item, 2);
}
var_export($result);

Or array_reduce() if you prefer functional code styling. (Demo)

var_export(
    array_reduce(
        $phones,
        function($result, $item) {
            [
                $key,
                $result[$key][]
            ] = explode(' ', $item, 2);
            return $result;
        },
    )
);

answered Jul 31, 2022 at 8:19

mickmackusa♦

49.2k13 gold badges98 silver badges165 bronze badges

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