Removing elements from an array

Anon

Hi!

How do I remove elements from an array ?

The only thing I found in the manual was a set of functions (PHP4 specific of course) that would do the trick but damn, isn't there another way to do it?

Something like:
Remove( 0, $myArray );

or:
$myArray[0] = null;

Funny though, that after two years of daily php-programming I've never removed elements from an array, just added new and searched for old 😉

/ Ronnie

Anon

Create a new array with just the elements you want and assign it to your array. You can do it like this:

function remove($index, &$array) {
$new_array = array();
for ($i = 0; $i < count($array); $i++)
if ($i != $index)
$new_array[] = $array[$i];
$array = $new_array;
}

Removing elements in an associative array would be a bit trickier, but it's the same idea.

Ori

Anon

There must be a easier (read faster) way of doing this!

Imagine handling a custom ADT with thousands of elements inserted and removed...

/ Ronnie

Anon

Hmmm....

I haven't tried it, but wouldn't array_splice do the trick? From the docs, it looks like if you wanted to kill item number 4, say from $myArray, you could do:

array_splice($myArray, 4, 1);

...just a thought...

peace,
nolan