http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html Using array_unique() with multidimensional arrays Comment Feed de Sun, 05 Feb 2012 09:30:31 +0000 mcw[blog] 'Ruby' Alpha 3 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment278 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment278 Peter Rother Mon, 09 Feb 2009 17:45:06 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment400 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment400 Lorem Tue, 24 Feb 2009 15:42:40 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment505 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment505 Jeremy Tue, 10 Mar 2009 21:45:33 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment521 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment521 Dominik Jungowski Fri, 13 Mar 2009 10:57:14 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment1094 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment1094 Frank Mon, 04 May 2009 23:29:53 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment1100 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment1100 Dominik Jungowski Tue, 05 May 2009 08:34:51 +0000
As for the example from the blogpost: I have just tested it once more and it worked as it should.

btw. the bug report was closed ("was never intended to work with multi-dimensional arrays") but at least the documentation has been updated ]]> http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment1857 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment1857 Dominik Jungowski Fri, 12 Jun 2009 15:46:32 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment7308 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment7308 zeromatrix Sun, 15 Nov 2009 01:05:05 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment8664 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment8664 Thu, 17 Dec 2009 07:43:24 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment10886 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment10886 Mukul Fri, 12 Feb 2010 13:12:29 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment11726 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment11726 John Flynn Mon, 01 Mar 2010 20:03:27 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment13870 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment13870 Christian Fri, 30 Apr 2010 15:04:47 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment13874 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment13874 Christian Fri, 30 Apr 2010 17:03:16 +0000
Not sure if it's a function limit or some other server/PHP limitation.

Christian ]]> http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment13877 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment13877 Dominik Jungowski Fri, 30 Apr 2010 19:51:27 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment13925 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment13925 Christian Sun, 02 May 2010 11:11:27 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment14238 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment14238 Fri, 14 May 2010 10:30:12 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment14252 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment14252 Dominik Jungowski Fri, 14 May 2010 16:18:37 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment15705 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment15705 KingIsulgard Wed, 14 Jul 2010 14:43:58 +0000
I wrote this code. It has the option to preserve keys, but default is non preserving keys. It is an optional parameter.

function arrayUnique($array, $preserveKeys = false) {
$newArray = array();
$newKeys = array();

// Add items to new array and remove doubles
foreach($array as $key => $item) {
$newArray[serialize($item)] = $item;
$newKeys[] = $key;
}

// Set keys
if($preserveKeys) {
array_combine($newKeys, $newArray);
} else {
$newArray = array_values($newArray);
}

return $newArray;
} ]]> http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment17340 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment17340 Achin Sharma Mon, 23 Aug 2010 14:28:10 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment18664 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment18664 Dominik Jungowski Wed, 15 Sep 2010 08:31:17 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment20123 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment20123 Christo Wed, 29 Sep 2010 22:52:00 +0000 Thank you
>_< ]]> http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment21946 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment21946 Yuriy Tue, 26 Oct 2010 12:37:09 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment28139 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment28139 Bernie Wed, 26 Jan 2011 07:52:48 +0000
I need to deal with a two-dimensional array of integers (array(x,2)), where some of the tuples are identical (and hence need to be removed).

While trying to debug the problem, I found that "serialize()" did not return the same string for identical tuples - the md5-idea is therfore doomed to fail.

I wonder about the "serialize()"-effect, though. It suggests, that the tuples concerned are actually not identical. But from the unserialized object this is not observable… ]]> http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment43657 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment43657 yi Mon, 05 Sep 2011 10:30:32 +0000 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment69986 http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment69986 carlos Wed, 18 Jan 2012 23:27:58 +0000