/*     * 获取连续数字拼接     * $arr = array(            'dev' => array(1, 2, 3, 4, 10, 20, 21, 22),            'dev2' => array(1, 2, 3, 50),            'dev3' => array(1)        );    *结果:            [dev] => devs1-2        [dev2] => dev2s1    */    public function getContinuouStr($arr){        $ret = array();        foreach ($arr as $agent => $server_arr) {            $count = count($server_arr);    //个数            $start = $server_arr[0];    //连续段的起始值            $pre = $start;  //上一个数            $_ret = array();            $_ret = array($start => 0);            for($i = 1; $i < $count; $i ++) {                $cur = $server_arr[$i];                if($cur - $pre == 1) {  //是连续                    $_ret[$start] = $cur;                } else {    //不连续                    $start = $cur;                    $_ret[$start] = 0;                }                $pre = $cur;            }            $ret[$agent] = $_ret;        }         $ret2 = array();        foreach ($ret as $agent => $server_arr) {            $str = '';            foreach ($server_arr as $k => $val) {                if($val > 0) {                    $str .= $agent . 's' . $k . '-' . $val . '&';                } else {                    $str .= $agent . 's' . $k . '&';                }            }            $str = rtrim($str, '&');            $ret2[$agent] = $str;        }         return $ret2;    }