Content with Style - Comments on php: array_filter and callback function

Content with Style - Comment #1 on php: array_filter and callback function

Thu, 20 Apr 2006 15:06:02 +0000

thanx-a-lot, pascal. a few days ago i had quite a bit of troublewhen i tried to define a class-based callback function for array_filter.

is this definition also working in php5?

Content with Style - Comment #2 on php: array_filter and callback function

Fri, 21 Apr 2006 01:33:59 +0000

Glad I could help. This should do:

$arr = array_filter($arr, array("self", "filter"));

Content with Style - Comment #3 on php: array_filter and callback function

Sat, 04 Nov 2006 14:16:22 +0000

Hi there. I’m currently working with an big array, and i have to filter some info out of it. This tutorial really helps, but i neat some more info.

The array is very multidimentional, like this:
$array[‘id’][‘category’][‘element’] = value.

So i want to filter out all the ID’s wich don’t have the good Value in [‘category’][‘element’], how can i do this?

couse the callback function only has $var, i cant give all the $ID’s:
function filter($var)
{
return($var[’$id’] == ’$askedvalue’);
}

would work, but how can i add $id/$askedvalue in the array_filter($array, ‘callbackfunction’)?

Content with Style - Comment #4 on php: array_filter and callback function

Mon, 06 Nov 2006 11:06:15 +0000

How about setting the variables as class members or globals?

Content with Style - Comment #5 on php: array_filter and callback function

Sun, 06 Jan 2008 10:12:38 +0000

Hi thanks for this tut, I really need it, but I’m having trouble understanding the array filter. I need to make a loop from an array which calls in a simple flat file database for a site menu, the database contains the site menu link names i.e. my web page, and I need the array to filter that data stripping the spaces to return mywebpage.txt (where the actual page is) as well as pull in the link name, all within an li tag so the “my web page” shows up as the link name and the mywebpage.txt shows up as the link. Here’s my function

function filter_str($string, $page=’’)
{
if ($page == ‘’)
$filter = ereg_replace(’[^a-zA-Z0-9_]’, ‘’, $string);

else
$filter = ereg_replace(”[^a-zA-Z0-9_$page]”, ‘’, $string);

return $filter;
}

$page = filter_str($page);

and my array loop

$array = file(“menudata.txt”);//holds menu link names

foreach($array as $page) {

echo “li a href=”index.php?page=$page”{$page}/a/li>”;

(i had to take the link lesser/greater tags out in this post to get them to show up.)

for the life of me I cannot figure out how to make it work.
Thanks for any help you have time to provide.

Karen