php正则提取数字

<?php
//$patterns = "/^(http|https):\/\/(.)*\.(.)*$/";
$patterns = "/\d+/";
$strs="23345swwyuiopbfASWEDD4667";
preg_match_all($patterns,$strs,$arr);
print_r($arr);
?>

Array
(
    [0] => Array
        (
            [0] => 23345
            [1] => 4667
        )

)


<?php
//$patterns = "/^(http|https):\/\/(.)*\.(.)*$/";
$patterns = "/\d/";
$strs="23345swwyuiopbfASWEDD4667";
preg_match_all($patterns,$strs,$arr);
print_r($arr);
?>

Array
(
    [0] => Array
        (
            [0] => 2
            [1] => 3
            [2] => 3
            [3] => 4
            [4] => 5
            [5] => 4
            [6] => 6
            [7] => 6
            [8] => 7
        )

)