Arrays utilities

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Checks if an array is a list

Starting from PHP 8.1 to determine if an array is a list you can use the array_is_list function, for older versions of PHP you can use the Inphinit\Utility\Arrays::indexed method, the variable is passed by reference, example:

use Inphinit\Utility\Arrays;

$list = [0 => 'foo', 1 => 'bar'];
$assoc = [0 => 'a', 1 => 'bar', 'foo' => 'bar'];

var_dump(Arrays::indexed($list)); // Returns true

var_dump(Arrays::indexed($assoc)); // Returns false

Checks if an array is associative

Starting from PHP 8.1 to determine if an array is a list you can use the if (array_is_list($array) === false), for older versions of PHP you can use the Inphinit\Utility\Arrays::associative method, the variable is passed by reference, example:

$list = [0 => 'foo', 1 => 'bar'];
$assoc = [0 => 'a', 1 => 'bar', 'foo' => 'bar'];

var_dump(Arrays::associative($list)); // Returns false

var_dump(Arrays::associative($assoc)); // Returns true

Sort recursive arrays by keys

Recursively sort an array by key in ascending order:

use Inphinit\Utility\Arrays;

$multidimentional = [
  'Foo' => 1,
  'bar' => 2,
  'Baz' => 3,
  'moo' => [
    10 => 100,
    20 => 200,
    30 => 300,
    5 => 50,
    1 => [
      'saitama' => 'one punch',
      'netero' => 'human evolution',
      'allmight' => 'symbol of Peace',
      'meruem' => 'this is why I was born'
    ]
  ]
];

Arrays::ksort($multidimentional); // same SORT_REGULAR
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_NUMERIC);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_STRING);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_LOCALE_STRING);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_NATURAL);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_FLAG_CASE);
print_r($multidimentional);

To sort in descending order you can set the third parameter to true, example:

use Inphinit\Utility\Arrays;

Arrays::ksort($multidimentional, SORT_REGULAR, true);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_NUMERIC, true);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_STRING, true);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_LOCALE_STRING, true);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_NATURAL, true);
print_r($multidimentional);

Arrays::ksort($multidimentional, SORT_FLAG_CASE, true);
print_r($multidimentional);

For flags details see: https://www.php.net/manual/en/function.ksort.php