Re: Deleting elements from the middle of an array

On Mon, Mar 14, 2011 at 09:34:33PM +0100, Peter Lind wrote: > On 14 March 2011 21:31, Paul M Foster <paulf@quillandmouse.com> wrote: > > Here's what I need to do: I have an indexed array, from which I need to > > delete elements in the middle. Once completed, the indexes should be > > numerically in sequence, as they were when I first encountered the > > array. That is: > > > > Before: > > $arr = array(0 => 5, 1 => 6, 2 => 7, 3 => 8, 4 => 9, 5 => 10); > > > > After: > > $arr = array(0 => 5, 1 => 6, 2 => 9, 3 => 10); > > > > > > I've tried: > > > > 1) Using for() with unset(). Elements are deleted, but the indexes are > > no longer sequential. > > > > 2) Using for() with array_splice(). Understandably, deletes certain > > elements but not others. > > > > 3) Using foreach() with referenced array elements. Neither unset() nor > > array_splice() appear to have any effect on the array at all. > > > > 4) while() loop using current() and the like. But these array functions > > return values, not references, so the array isn't actually modified. > > > > 5) array_walk() with unset() array_splice(). No effect on the array. > > > > Anyone know how to do this, or know of a reference on how to? > > > > Remove the elements, then use sort(). I've given a simplified example. The actual target array is multi-dimensional. Sort() won't work in a case like that, as far as I know. Moreover, I don't want the array sorted based on the element values. Paul -- Paul M. Foster http://noferblatz.com http://quillandmouse.com