array_values

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wizglins at gmx dot ch
14-Apr-2006 03:21


In case you want to replace all keys in multiarrays by integers starting at 0, the following function might help.



<?php



function numerieren($array)

{

$array_v = array_values($array);

$count_v = count($array_v);



for ($i=0; $i<$count_v; $i++)

  if (is_array($array_v[$i]))

    $array_v[$i] = numerieren($array_v[$i]);

return $array_v;

}



?>

Yassin Ezbakhe <yassin88 at gmail dot com>
01-Sep-2005 07:28


<?php

/**********************************************

 *

 *   PURPOSE: Flatten a deep multidimensional array into a list of its

 *   scalar values

 *

 *   array array_values_recursive (array array)

 *

 *   WARNING: Array keys will be lost

 *

 *********************************************/



function array_values_recursive($array)

{

    $arrayValues = array();



    foreach ($array as $value)

    {

        if (is_scalar($value) OR is_resource($value))

        {

             $arrayValues[] = $value;

        }

        elseif (is_array($value))

        {

             $arrayValues = array_merge($arrayValues, array_values_recursive($value));

        }

    }



    return $arrayValues;

}

?>



This function is an improved and faster version of the one posted by <27-Apr-2004 09:47>

kars at kde dot nl
24-May-2005 06:08


Also, objects in the array that were added by reference are handled correctly as well:



class Foo {

        var $n;



        function Foo ($n) {

                $this->n = $n;

        }

}



$a = new Foo(1);

$b = new Foo(2);

$c = new Foo(3);

$l = array(&$a, &$b, &$c); // add by reference

$m = array_values($l);



$a->n = 5;



echo $m[0]->n;



This prints "5" as you would expect.

28-Apr-2004 09:47


<?php 

/**

   flatten an arbitrarily deep multidimensional array 

   into a list of its scalar values

   (may be inefficient for large structures)

   (will infinite recurse on self-referential structures)

   (could be extended to handle objects)

*/

function array_values_recursive($ary)

{

   $lst = array();

   foreach( array_keys($ary) as $k ){

      $v = $ary[$k];

      if (is_scalar($v)) {

         $lst[] = $v;

      } elseif (is_array($v)) {

         $lst = array_merge( $lst,

            array_values_recursive($v)

         );

      }

   }

   return $lst;

}

?>



code till dawn!  -mark meves!

cyberphant0m AT earthlink DOT net
28-Feb-2004 01:24


That may be true, however I doubt that anyone should have that big of an array. If they do then they probably are doing some intense computing in which case, they may want to opt for the power of C++.

nopy at users dot sourceforge dot net
24-Oct-2003 06:36


Just a warning that re-indexing an array by array_values() may cause you to reach the memory limit unexpectly.





For example, if your PHP momory_limits is 8MB,


 and says there's a BIG array $bigArray which allocate 5MB of memory.





Doing this will cause PHP exceeds the momory limits:





<?php


  $bigArray = array_values( $bigArray );


?>





It's because array_values() does not re-index $bigArray directly,


it just re-index it into another array, and assign to itself later.

04-Nov-2002 11:48


also useful to use for list(), if the array for input is the result of a function that only returns associative arrays:



list($var1, $var2, $var3) = array_values(myfunc("only returns assoc arrays"));

mailseppel at gmx dot de
04-Oct-2002 07:10


Remember, that the following way of fetching data from a mySql-Table will do exactly the thing as carl described before: An array, which data may be accessed both by numerical and DB-ID-based Indexes:



<?php

$row = mysql_fetch_array($db_result, $db_link);

?>



Hope I haven't misunderstood anything here.. :)

carl at thep.lu.se
30-Jan-2002 07:59


Indeed you can, and that's what's so great about it. I have, for instance, a function that returns the results of a database query as an array. I want to keep the order that the entries were returned in, but at the same time I want to be able to access them _either_ by the position _or_ by some other index (such as some sort of ID in the database, gotten from elsewhere). In this case, I can make the function return an array from id to [array of values], and by a simple call to array_values() this is transformed into an array indexed from 0 to count()-1. Useful.

richard at phpguru dot org
20-Dec-2001 04:56


If you have a numerically indexed array with some keys missing, ie 1, 2, 4, 5 and you want to reindex it so it's 1,2,3,4 *without changing the positions of the values* (ie sort()) then you can use this function to do it.

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