On Thu, 2002-04-25 at 14:01, Kevin Stone wrote:
> About all I would suggest is that you eliminate the unecessary function
> calls substr and explode to optimize your code. I doubt prebuilt PHP
> functions will help you here. This is perfectly valid method for deleting
> elements in an array and it's about as fast as you're ever going to get. :)
But PHP builtins will do exactly this, around 3 times faster, too. :)
<?php
error_reporting(E_ALL);
$listitems = array ('grill', 'world', 'bar', 'foo', 'world', 'foo');
// To delete one value:
$item_to_delete = 'foo';
// To delete multiple values at once:
// $item_to_delete = array('foo', 'world');
$listitems = array_diff($listitems, (array)$item_to_delete);
print_r($listitems);
?>
If you need the array reindexed, just array_values() it when you're
done.
> <?
> $listitems = array ('grill', 'bar', 'foo', 'world');
> $item_to_delete = 'foo';
>
> // Loop through listitems array.
> for ($i=0; $i<count($listitems); $i++)
> {
> // Ignore item to delete.
> if ($listitems[$i] != $item_to_delete)
> {
> // Save all other items in tmplist array.
> $tmplist[] = $listitems[$i];
> }
> }
> $listitems = $tmplist; //new array contains (grill, bar, world)
> ?>
>
> -Kevin
>
> ----- Original Message -----
> From: "Liam Gibbs" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Thursday, April 25, 2002 2:27 PM
> Subject: Re: [PHP] Array function to delete
>
>
> > Thanks for all your help, everyone, but both
> > suggestions (unset and array_slice) pretty much didn't
> > improve on my current way. I was jsut trying to find a
> > faster way, but unset doesn't seem to be working
> > properly (but I'll need to fiddle more) and the
> > array_slice way is just too intensive.
> >
> > for($counter = 0; $counter < count($listitems);
> > $counter++) {
> > if($listitems[$counter] != $item)
> > $newlist .= ",$listitems[$counter]";
> > }
> > $newlist = substr($newlist, 1, strlen($newlist));
> > $listitems = explode("," $newlist);
> >
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>
>
>
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