字符串中截取连续出现数字最长一组

public function tes()
{
    $a = 'abcd12345ed125ss123456789988888';

    $pattern = '/[D]+/';
    $numberStrs = preg_split($pattern, $a, null, PREG_SPLIT_NO_EMPTY);
    dump($numberStrs);

    function lengthSort($a, $b)
    {
        if (strlen($a) == strlen($b)) return 0;
        return (strlen($a) < strlen($b)) ? -1 : 1;
    }
//
    usort($numberStrs, 'lengthSort');
    $longestStr = end($numberStrs);
    var_dump($longestStr);
}
数组排序
$v['date']为要排序的字段

foreach($newsw as $key=>$val){
    $new_array= array();
    $sort_array = array();
    foreach($val as $k=>$v){
        $sort_array[$k] = $v['date'];
    }
    asort($sort_array);
    reset($sort_array);

    foreach($sort_array as $k=>$v){
        $new_array[$k] = $newsw[$key][$k];
    }
    $newsw[$key] = $new_array;
}