<!-- Collection of code snippets by Arne Vajhøj -->
<!-- posted to eksperten.dk, usenet and other places (2002-now) -->
<?php
$a = array("Designnr:345", "???-444s", "345", "s2002", "FF..2", "r:33", "Dig:334-1dd-Design444", "444[0]");
$a2 = array();
foreach($a as $e) {
    preg_match_all('/\d+/is', $e, $matches);
    for($i = 0; $i < count($matches[0]); $i++) {
        $a2[] = $matches[0][$i];
    }
}
$a3 = array_count_values($a2);
arsort($a3);
foreach($a3 as $k => $v) {
    echo "$k $v\r\n";
}
?>