John Campbell wrote:
> In php 5.3 we should be able to:
>
> function flatten($arr) {
> $result = array();
> array_walk_recursive($arr,function($k,$v) use (&$result) {$result[] = $v});
> return $result;
> }
>
> Shows the power of closures & lambdas.
That's pretty slick!
> Of course that code is of no use to you.
>
> Try:
>
> function flatten($arr) {
> $result = array_values($arr);
> $i = 0;
> while($i < count($result) )
> is_array($result[$i]) ?
> array_splice($result,$i,1,array_values($result[$i])) :
> $i++;
> return $result;
> }
It took me a minute to figure out what you're doing there, very neat
approach to handling the sub-arrays!
If you want to retain the keys, you could do something like:
function flatten($input,$separator = '_')
{
if (!is_array($input)) {
return false;
}
_flatten($input,$output = array(),$separator);
return $output;
}
function _flatten(&$input,&$output,$sep,$prefix = '')
{
foreach ($input as $k => $v) {
$new_k = $prefix ? $prefix . $sep . $k : $k;
if (is_array($v)) {
_flatten($v,$output,$sep,$new_k);
} else {
$output[$new_k] = $v;
}
}
}
Dan
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