Check array keys

Question

Next, I have a value saved array in the variable $chaves as the example below:

array(2) {
   [0] => array(1) {
      ["chave"] => string(1) "1"
   }
   [1] => array(1) {
      ["chave"] => string(1) "3"
   }
}

I made a bow:

foreach ($chaves as $chave) {
    if (in_array($row['chave'], $chave)) {
       echo 'ok, é igual';
    } else {
       echo 'ok, não é igual';
    }
}

However, it is printing like "ok, it’s equal ok, it’s not equal", but it should print: "ok, it’s not equal" when the value is different and "ok, it’s equal" when the value is equal.

The idea is to show that it is the same when the key values are equal.

Answer 1

If the idea is to check a key from an external collection and if it is equal to the value, you can do so:

foreach ($chaves as $key => $chave) {
    if ($row['chave'] == $key) {
       echo 'ok, é igual';
    } else {
       echo 'ok, não é igual';
    }
}

If it is to check that the collection key itself is equal to the value, it would be so:

  foreach ($chaves as $key => $chave) {
        if ($key == $chave) {
           echo 'ok, é igual';
        } else {
           echo 'ok, não é igual';
        }
    }

Now if you want to check the key inside an array, without needing the loop, this is so:

if (array_key_exists($row['chave'], $chaves)) {
  echo 'ok, é igual';
} else {
  echo 'ok, não é igual';
}