Check if an array it not a indexed array [duplicate]

Question

I need check if a specific Array is keyed or indexed. For instance:

// Key defined array
array('data-test' => true, 'data-object' => false);

// Indexed array
array('hello', 'world');

I can easily do a foreach with the array keys to check if all is integer. But exists a correct way to check it? A built-in PHP function?

POSSIBLE SOLUTION

// function is_array_index($array_test);
//    $array_test = array('data-test' => true, 'data-object' => false);

foreach(array_keys($array_test) as $array_key) {
    if(!is_numeric($array_key)) {
        return false;
    }
}

return true;

Arkadiusz 'flies' Rzadkowolski · Accepted Answer · 2013-03-04 20:39:24Z

2

function is_indexed($arr) {
  return (bool) count( array_filter( array_keys($arr), 'is_string') );
}

answered Mar 4, 2013 at 20:39

Arkadiusz 'flies' Rzadkowolski

5,8372 gold badges32 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

bitWorking · Accepted Answer · 2013-03-04 20:39:43Z

1

this is from php.net function.is-array:

function is_assoc($array) {
    return (is_array($array) && 0 !== count(array_diff_key($array, array_keys(array_keys($array)))));
}

answered Mar 4, 2013 at 20:39

bitWorking

12.7k1 gold badge34 silver badges38 bronze badges

Comments

James Coyle · Accepted Answer · 2013-03-04 20:41:30Z

1

The function

function isAssoc($arr)
{
    return array_keys($arr) !== range(0, count($arr) - 1);
}

should work.

answered Mar 4, 2013 at 20:41

James Coyle

10.5k2 gold badges42 silver badges49 bronze badges

Comments

BenOfTheNorth · Accepted Answer · 2013-03-04 20:41:15Z

0

You could check for the key [0]:

$arr_str = array('data-test' => true, 'data-object' => false);

$arr_idx = array('hello', 'world');

if(isset($arr_str[0])){ echo 'index'; } else { echo 'string'; }

echo "\n";

if(isset($arr_idx[0])){ echo 'index'; } else { echo 'string'; }

Example: http://codepad.org/bxCum7fU

answered Mar 4, 2013 at 20:41

BenOfTheNorth

2,8621 gold badge23 silver badges47 bronze badges

Collectives™ on Stack Overflow

Check if an array it not a indexed array [duplicate]

4 Answers 4

Comments

Comments

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

Comments

Comments

Comments

Linked

Related