Re: [PHP] array conversion

On Thursday 18 February 2010 11:58:28 pm Paul M Foster wrote:
> On Fri, Feb 19, 2010 at 01:20:12PM +0800, Dasn wrote:
> > Hi guys. How to convert an array like:
> >
> > Array
> > (
> >     [0] => key1
> >     [1] => value1
> >     [2] => key2
> >     [3] => value2
> > )
> >
> > to
> >
> >
> > Array
> > (
> >     [key1] => value1
> >     [key2] => value2
> > )
> >
> > Is there a built-in function to do this?
> > Please Cc me. :)
> > Thank you in advance.
> 
> I don't believe so, but rolling your own should not be too hard:
> 
> $a = array($key1, $value1, $key2, $value2);
> $b = array();
> $numitems = count($a);
> 
> for ($i = 0; $i < $numitems; $i++) {
> 	if ($i % 2 == 0) {
> 		$saved_key = $a[$i];
> 	}
> 	elseif ($i % 2 == 1) {
> 		$b[$saved_key] = $a[$i];
> 	}
> }
> 
> Code is crude and untested, but you get the idea.
> 
> Paul

This would be even shorter, I think:

foreach ($items as $i => $value) {
  $temp[$i % 2][] = $value;
}
$done = array_combine($temp[0], $temp[1]);

(Also untested, just off the cuff...)

--Larry Garfield