PHP Multi-Dimensional array search (with array_search)

Question

I am aware of this question, but I have an additional one to search for an array-key. Take a look at this:

array(2) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "Text 1"
    ["types"]=>
    array(3) {
      [0]=>
      string(7) "Level 1"
      [1]=>
      string(14) "something else"
      [2]=>
      string(15) "whatisearchfor1"
    }
  }
  [1]=>
  array(2) {
    ["name"]=>
    string(6) "Text 2"
    ["types"]=>
    array(3) {
      [0]=>
      string(7) "Level 2"
      [1]=>
      string(14) "something else"
      [2]=>
      string(15) "whatisearchfor2"
    }
  }
}

This snippet...

echo array_search("Text 2", array_column($response, "name"));

...gives me a 1 for the second array-key, in which the term was found.

But how do I receive the global array-key (0 or 1), if I search for whatisearchfor2, which is stored in the multi-array "types"?

echo array_search("whatisearchfor2", array_column($response, "types"));

...doesn't work.

you can var_dump(array_column($response,'types')) for get output array this function. — Naumov
– Naumov, Commented Feb 11, 2016 at 13:30

RomanPerekhrest · Accepted Answer · 2016-02-11 19:23:10Z

2

In your case array_column($response, "types") will return an array of arrays. But to get "global array-key (0 or 1), if you search for whatisearchfor2" use the following approach with array_walk:

$key = null; // will contain the needed 'global array-key' if a search was successful
$needle = "whatisearchfor2"; // searched word

// assuming that $arr is your initial array
array_walk($arr, function ($v,$k) use(&$key, $needle){
    if (in_array($needle, $v['types'])){
        $key = $k;
    }
});

var_dump($key);    // outputs: int(1)

edited Feb 11, 2016 at 19:23

answered Feb 11, 2016 at 14:04

RomanPerekhrest

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1 Comment

Sebastian Over a year ago

I also found out, that array_search("whatisearchfor2", array_column(array_column($response, "types"), 0)); is working, too. What is better or more efficient?

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