foreach (new DirectoryIterator('.') as $item) {
    echo $item, PHP_EOL;
}

<?php
$orderId = $_GET['orderid'];


$dir = new DirectoryIterator('uploads');
$fileMatches = array();

foreach ($dir as $fileinfo) {

    $filenameId= substr($fileinfo->getFilename(), 0, 9);

    if($filenameId === $orderId){
        //store File ID matches in an array
        $fileMatches[] = $filenameId;
    }
    echo $fileinfo->getFilename() . "<br>";
}
$totalImages = count($fileMatches);
echo '<hr>Total Images found for this ID '.$orderId.' = '.$totalImages;
echo '<hr>New count for image would be = '. ($totalImages+1);

?>

$user_imgs = count(glob('imgs/*'.$user_id.'*')));

$orderId = $_GET['orderid'];

$all_images = glob('uploads/'.$orderId.'*');

foreach($all_images as $i)
    echo $i . '<br/>';

$totalImages = count($all_images);

echo '<hr>Total Images found for this ID '.$orderId.' = '.$totalImages;
echo '<hr>New count for image would be = '. ($totalImages+1);

$orderId = $_GET['orderid'];

$all_images = glob('uploads/'.$orderId.'*');

$pp = $qc = 0;

foreach($all_images as $i) {
    if (strpos($i, '-PP.')!==false)
        $pp++;
    elseif (strpos($i, '-QC.')!==false)
        $qc++;
}

echo '<hr>Total Images found for this ID '.$orderId.' (PP) = '.$pp;
echo '<hr>New count for image would be = '. ($pp+1);

echo '<hr>Total Images found for this ID '.$orderId.' (QC) = '.$qc;
echo '<hr>New count for image would be = '. ($qc+1);

<?php
// note explicitly set here, but in wild it might be int
$_GET['orderid'] = '100002246';

if(! isset($_GET['orderid']) || ( isset($_GET['orderid']) && !is_string($_GET['orderid']))
  || (isset($_GET['orderid']) && is_string($_GET['orderid']) && !preg_match('/^[0-9]+$/', $_GET['orderid']))) {
    // don't run script, this isn't a valid ID
    die("We didn't have a good namen");
  }

foreach (new DirectoryIterator('.') as $fileInfo)
{
    if($fileInfo->isDot()) continue;

    $parts = preg_split('/-/', $fileInfo->getFilename());

    if(count($parts) != 7)
    {
        echo "Cannot parse this file: ", $fileInfo->getFilename(), PHP_EOL;
        continue;
    }

    $associated_parts = array(
        "id"    => (int)$parts[0],
        "count" => (int)$parts[1],
        "date"  => $parts[2] . '-' . $parts[3] . '-' . $parts[4],
        "name"  => $parts[5],
        "ext"   => $parts[6]
    );

    if($associated_parts['id'] == $id)
    {
        $associated_parts['count'] = $associated_parts['count'] + 1;
        $new_file = implode('-', $associated_parts);
        rename($fileInfo->getFilename(), $new_file);
    }
}

foreach (new DirectoryIterator('.') as $fileInfo)
{
    if($fileInfo->isDot()) continue;
    echo $fileInfo->getFileName(), PHP_EOL;
}