正则表达式：设为“零或一次出现”条件，但仅适用于最后一次匹配

Question

I have this string:

key1:val1;key2:val2;key3:val3

It could be written like this too:

key1:val1;key2:val2;key3:val3;

I want to preg_match_all both of strings above so it will return same array like this:

MATCHES 1

Array
(
    [0] => key1
    [1] => key2
    [2] => key3
)

MATCHES 2

Array
(
    [0] => val1
    [1] => val2
    [2] => val3
)

Right now, I'm using this regex:

(.*?):(.*?);

Unfortunately, it don't work for the first string. I tried using regex below before, but the result was worse:

(.*?):(.*?);?

Here is my experiment so far: https://3v4l.org/5HAco . If there is a pure PHP function to solve this problem, I can accept it too.

Answer 1

$text = "key1:val1;key2:val2;key3:val3";

preg_match_all("/(.*?):(.*?)(?:;|$)/",$text,$matches);
print_r($matches);


$text = "key1:val1;key2:val2;key3:val3;";

preg_match_all("/(.*?):(.*?)(?:;|$)/",$text,$matches);
print_r($matches);

Output:

Array
(
    [0] => Array
        (
            [0] => key1:val1;
            [1] => key2:val2;
            [2] => key3:val3
        )

    [1] => Array
        (
            [0] => key1
            [1] => key2
            [2] => key3
        )

    [2] => Array
        (
            [0] => val1
            [1] => val2
            [2] => val3
        )

)
Array
(
    [0] => Array
        (
            [0] => key1:val1;
            [1] => key2:val2;
            [2] => key3:val3;
        )

    [1] => Array
        (
            [0] => key1
            [1] => key2
            [2] => key3
        )

    [2] => Array
        (
            [0] => val1
            [1] => val2
            [2] => val3
        )

)