Recursive function for multidimensional arrayunpack

[MrXHellboy]

Hi all,

 

Ok, simple question...

 

just imagine a multidimensional array,

array(array(1,2,3,array(4,5,6, array(7,8,9))));

 

how to build a recursive function that will unpack all the arrays into 1 array.

 

Somehow, none of my tries has worked out properly

 

Cheers

[seanlim]

<?php
function array_unpack($array)
{
$new_array = array();
foreach($array as $key=>$val)
	if(is_array($val)) 
		$new_array = array_merge($new_array, array_unpack($val));
	else
		$new_array[] = $val;
return $new_array;
}
var_dump(array_unpack(array(array(1,2,3,array(4,5,6, array(7,8,9))))));

?>

[MrXHellboy]

Thx! Any other possibility for this ? I want to use the keys as well, and add a prefix to the key accordingly.... Array_merge does not support key options in this way as far as i know.

 

So:

array(array('Key' => 1,2,3,array(4,5,6, array('Key' => 7,8,9))))

 

the second key 'Key' must get a prefix.... is not really possible with array_merge ?!

 

Cheers

[seanlim]

the second key 'Key' must get a prefix....

 

can you clarify, prefixed with what exactly?

[MrXHellboy]

Lets say, 'prefix' for example. Doesn't really matter, as long as they all will be in the new array.

[seanlim]

this?

function array_unpack($array, $str="")
{
$new_array = array();
foreach($array as $key=>$val)
{
	if(is_array($val)) 
		$new_array = array_merge($new_array, array_unpack($val, $str.$key."."));
	else if(is_int($key))
			$new_array[] = $val;
	else
			$new_array[$str.$key] = $val;
}
return $new_array;
}

[MrXHellboy]

Unfortunately no.

 

Your first snippet was Ok. Everything was cool!

 

But now, the second  index 'key' needs to become prefix_key because there was already an index called 'key'.

 

[MrXHellboy]

And 1 thing more.

 

Why doesn't need

$new_array = array_merge($new_array, array_unpack($val, $str.$key."."));

 

brackets and

$new_array[] = $val;

 

does ?

 

It seems like you are overwriting this variable each time, but it doesnt... So what the big deal there

[seanlim]

array_merge returns the the merged array, so we assign the entire array back into $array_new

 

in the second statement, we are appending $val to the next integer key in $new_array