Eliminating array elements not containing string

[anderson_catchme]

So I'm trying to unset array elements that don't contain "thumbnail" in the filename. Seems simple, but it's not working.

 

function generateImage3 ($category, $imageornot, $Imagepointer) {
    if($imageornot == 1){
    $var = get_cwd_uploads().'\\'.$Imagepointer; // get_cwd_uploads() is a custom function
    $scanned_directory = array_diff(scandir($var), array('..', '.'));
    foreach($scanned_directory as $elements){
    $pos = strpos($elements, 'thumbnail');
    if($pos === FALSE){
            unset($scanned_directory[key($elements)]);
        }
    }

// irrelevant code

 

Any help appreciated.

[anderson_catchme]

Nevermind, solved it. Mods you may delete this.

[requinix]

We don't really like deleting stuff. What we would like is if you shared what you had to do to fix your problem.

 

And while I'm here, next time please actually describe the problem ("it's not working" doesn't mean much) and use

 tags around your code.

Edited September 3, 2014 by requinix

[AbraCadaver]

You want to use the key from the foreach.  Also you want to use !== false because it exists:

foreach($scanned_directory as $key => $elements){
    $pos = strpos($elements, 'thumbnail');
    if($pos !== FALSE){
        unset($scanned_directory[$key]);
    }
}

However this is much simpler (replaces all of your code):

$files = preg_grep("/thumbnail/", glob("$var/*.*"), PREG_GREP_INVERT);