Convert associative array into indexed

Question

Ive seen a few examples by using array_values, but cant quite make out how to get it to work...

I have an associative array thats passed via POST, I need to convert it into a indexed array...

My print_r($_POST) gives me this... I need all of this put into an indexed array :)

Array (
    [fieldnames] => 36771X21X198|36771X21X199|36771X21X200|36771X21X201|36771X21X202 
    [36771X21X198] => 3434343
    [display36771X21X198] => on
    [36771X21X199] => 5656565
    [display36771X21X199] => on 
    [36771X21X200] => 89898989 
    [display36771X21X200] => on 
    [36771X21X201] => 90909090 
    [display36771X21X201] => on 
    [36771X21X202] => 12121212 
    [display36771X21X202] => on 
    [move] => movesubmit 
    [move2] => ONLINE Submit 
    [thisstep] => 1 
    [sid] => 36771 
    [token] => 1234567890
)

It would be easier to provide an answer if you showed an example of what you're wanting to achieve — Phil, Oct 25 '11 at 11:55
Also, terminology check: all PHP arrays are associative. There are a few names in use for those where the indexes are consecutive integers; "numerically indexed" is a good choice. — Jon, Oct 25 '11 at 11:58
`array_values()` does exactly what you describe. How can you not `make out how to get it to work`? What is the problem you are having with it? — DaveRandom, Oct 25 '11 at 12:00
+1 guys. I can't figure out why you would like to turn this into a "numerically indexed" array. A lot of data goes missing right there. Try to explain better — OptimusCrime, Oct 25 '11 at 12:07

ghbarratt · Accepted Answer · 2016-05-19T20:32:19.737

Observe this amazing way to convert your $_POST into a numerically indexed array:

$numerical = array_values($_POST);

but what if you want to preserve your keys? Perhaps you want something like this?

$numerical = array();
$sep = ':';

foreach($_POST as $k=>$v)
{
  $numerical[] = $k.$sep.$v;
}

$numerical will then have:

Array
(
    [0] => fieldnames:36771X21X198|36771X21X199|36771X21X200|36771X21X201|36771X21X202
    [1] => 36771X21X198:3434343
    [2] => display36771X21X198:on
    [3] => 36771X21X199:5656565
    [4] => display36771X21X199:on
    [5] => 36771X21X200:89898989
    [6] => display36771X21X200:on
    [7] => 36771X21X201:90909090
    [8] => display36771X21X201:on
    [9] => 36771X21X202:12121212
    [10] => display36771X21X202:on
    [11] => move:movesubmit
    [12] => move2:ONLINE Submit
    [13] => thisstep:1
    [14] => sid:36771
    [15] => token:1234567890
)

or, for my final example:

$fieldnames_original = explode('|', $_POST['fieldnames']);
$fieldnames_actual = array();
$values = array();

foreach($_POST as $k=>$v)
{
  if($k!='fieldnames')
  {
    $fieldnames_actual[] = $k;
    $values[] = $v;
  }
}

which will set 3 arrays:

$fieldnames_original:

Array
(
    [0] => 36771X21X198
    [1] => 36771X21X199
    [2] => 36771X21X200
    [3] => 36771X21X201
    [4] => 36771X21X202
)

$fieldnames_actual:

Array
(
    [0] => 36771X21X198
    [1] => display36771X21X198
    [2] => 36771X21X199
    [3] => display36771X21X199
    [4] => 36771X21X200
    [5] => display36771X21X200
    [6] => 36771X21X201
    [7] => display36771X21X201
    [8] => 36771X21X202
    [9] => display36771X21X202
    [10] => move
    [11] => move2
    [12] => thisstep
    [13] => sid
    [14] => token
)

and $values:

Array
(
    [0] => 3434343
    [1] => on
    [2] => 5656565
    [3] => on
    [4] => 89898989
    [5] => on
    [6] => 90909090
    [7] => on
    [8] => 12121212
    [9] => on
    [10] => movesubmit
    [11] => ONLINE Submit
    [12] => 1
    [13] => 36771
    [14] => 1234567890
)

Would something like this work: `$numbered = (array) array_merge($one, $two, $three);` — Kelvin Shadewing, Feb 12 '16 at 18:06
@NabeelKhan I think you are on to something there. PHP will keep the associative array associative, even if typecasted as "array". I will adjust my answer. Thanks — ghbarratt, May 19 '16 at 20:31

score 1 · Answer 2 · edited Jul 10 '14 at 07:17

1

function

function array_default_key($array) {
   $arrayTemp = array();
    $i = 0;
    foreach ($array as $key => $val) {
         $arrayTemp[$i] = $val;
          $i++;
     }
      return $arrayTemp;
}

Pass the associative array as a parameter and it will convert into the default index of the array. For example: we have Array('2014-04-30'=>43,'2014-04-29'=>41) after the call to the function the array will be Array(0=>43,1=>41).

edited Jul 10 '14 at 07:17

Illidanek

996
1
18
32

answered Jul 09 '14 at 10:15

1

Could you provide a description or brief explanation of how your code solves the problem? – Illidanek Jul 09 '14 at 10:29
just pass associative array as parameter and it convert into default index of array. For example: we have Array('2014-04-30'=>43,'2014-04-29'=>41) after call function array will be Array(0=>43,1=>41) – Jul 10 '14 at 05:05

score 0 · Answer 3 · answered Jan 05 '21 at 04:56

Recursive assoc to indexed converter tested on a small array.

function assoc2indexedMulti($arr) {

    // initialize destination indexed array
    $indArr = array();

    // loop through source
    foreach($arr as $val) {

        // if the element is array call the recursion
        if(is_array($val)) {

            $indArr[] = assoc2indexedMulti($val);

        // else add the value to destination array
        } else {

            $indArr[] = $val;
        }
    }

    return $indArr;
}

Convert associative array into indexed

3 Answers3

Linked