獲取字符串中數字的正則表達式

<?php
    $patterns = "/\d+/"; //第一種
    //$patterns = "/\d/";   //第二種
    $strs="left:0px;top:202px;width:90px;height:30px";
    preg_match_all($patterns,$strs,$arr);
    print_r($arr);

/***運行結果*/

//第一種
Array
(
    [0] => Array
        (
            [0] => 0
            [1] => 202
            [2] => 90
            [3] => 30
        )
)
//第二種
Array
(
    [0] => Array
        (
            [0] => 0
            [1] => 2
            [2] => 0
            [3] => 2
            [4] => 9
            [5] => 0
            [6] => 3
            [7] => 0
        )
)</pre>