Flattening Multidimensional array to unique values

[Chuy08]

If I have a multidimensiona l array like the following:

Array
$records =Array
0 =[Product] 30 year, [Rate]6.0;
1 =[Product] 30 year, [Rate]6.0;
2 =[Product] Pay Option, [Rate]1.0;
3 =[Product] Pay Option, [Rate]1.0;

How could I flatten this to achieve an array that only has unique Product
values, basically removing $records['1] and $records['3'] in this example?



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[Rik]

Re: Flattening Multidimensiona l array to unique values

On Mon, 12 Feb 2007 18:43:26 +0100, Chuy08 <chuy08@yahoo.c omwrote:

If I have a multidimensiona l array like the following:
>
Array
$records =Array
0 =[Product] 30 year, [Rate]6.0;
1 =[Product] 30 year, [Rate]6.0;
2 =[Product] Pay Option, [Rate]1.0;
3 =[Product] Pay Option, [Rate]1.0;
>
How could I flatten this to achieve an array that only has unique Product
values, basically removing $records['1] and $records['3'] in this
example?

Why does you example not contain a multidimensiona l array? This one is
handled just fine by array_unique(). ..

You probably mean:
$records = array(
array('product' ='30 year','rate'=6. 0),
array('product' ='30 year','rate'=6. 0),
array('product' ='Pay option','rate'= 1.0),
array('product' ='Pay option','rate'= 1.0));

Quite some overhead, but workable (even preserves keys):
<?php
function array_unique_mu lti($array){
$copy = $array;
array_walk($arr ay,create_funct ion('&$v,$k','$ v = serialize($v);' ));
$array = array_unique($a rray);
return array_intersect _key($copy,$arr ay);
}
?>

Be carefull not to have unserializable content in the array.
--
Rik Wasmus